diff --git a/packages/apple/Sources/Models/Types.swift b/packages/apple/Sources/Models/Types.swift
index e4681362..42365f34 100644
--- a/packages/apple/Sources/Models/Types.swift
+++ b/packages/apple/Sources/Models/Types.swift
@@ -844,6 +844,15 @@ public struct VerifyPurchaseResultAndroid: Codable {
     public var testTransaction: Bool
 }
 
+/// Result from Meta Horizon verify_entitlement API.
+/// Returns verification status and grant time for the entitlement.
+public struct VerifyPurchaseResultHorizon: Codable {
+    /// Unix timestamp (seconds) when the entitlement was granted.
+    public var grantTime: Double?
+    /// Whether the entitlement verification succeeded.
+    public var success: Bool
+}
+
 public struct VerifyPurchaseResultIOS: Codable {
     /// Whether the receipt is valid
     public var isValid: Bool
@@ -1142,6 +1151,12 @@ public struct RequestPurchaseProps: Codable {
     }
 }
 
+/// Platform-specific purchase request parameters.
+/// 
+/// Note: "Platforms" refers to the SDK/OS level (apple, google), not the store.
+/// - apple: Always targets App Store
+/// - google: Targets Play Store by default, or Horizon when built with horizon flavor
+///   (determined at build time, not runtime)
 public struct RequestPurchasePropsByPlatforms: Codable {
     /// @deprecated Use google instead
     public var android: RequestPurchaseAndroidProps?
@@ -1228,6 +1243,12 @@ public struct RequestSubscriptionIosProps: Codable {
     }
 }
 
+/// Platform-specific subscription request parameters.
+/// 
+/// Note: "Platforms" refers to the SDK/OS level (apple, google), not the store.
+/// - apple: Always targets App Store
+/// - google: Targets Play Store by default, or Horizon when built with horizon flavor
+///   (determined at build time, not runtime)
 public struct RequestSubscriptionPropsByPlatforms: Codable {
     /// @deprecated Use google instead
     public var android: RequestSubscriptionAndroidProps?
@@ -1273,12 +1294,16 @@ public struct RequestVerifyPurchaseWithIapkitGoogleProps: Codable {
     }
 }
 
+/// Platform-specific verification parameters for IAPKit.
+/// 
+/// - apple: Verifies via App Store (JWS token)
+/// - google: Verifies via Play Store (purchase token)
 public struct RequestVerifyPurchaseWithIapkitProps: Codable {
     /// API key used for the Authorization header (Bearer {apiKey}).
     public var apiKey: String?
-    /// Apple verification parameters.
+    /// Apple App Store verification parameters.
     public var apple: RequestVerifyPurchaseWithIapkitAppleProps?
-    /// Google verification parameters.
+    /// Google Play Store verification parameters.
     public var google: RequestVerifyPurchaseWithIapkitGoogleProps?
 
     public init(
@@ -1310,36 +1335,100 @@ public struct SubscriptionProductReplacementParamsAndroid: Codable {
     }
 }
 
-public struct VerifyPurchaseAndroidOptions: Codable {
+/// Apple App Store verification parameters.
+/// Used for server-side receipt validation via App Store Server API.
+/// 
+/// ⚠️ SECURITY: Contains sensitive token (jws). Do not log or persist this data.
+public struct VerifyPurchaseAppleOptions: Codable {
+    /// The JWS (JSON Web Signature) representation of the transaction.
+    /// ⚠️ Sensitive: Do not log this value.
+    public var jws: String
+
+    public init(
+        jws: String
+    ) {
+        self.jws = jws
+    }
+}
+
+/// Google Play Store verification parameters.
+/// Used for server-side receipt validation via Google Play Developer API.
+/// 
+/// ⚠️ SECURITY: Contains sensitive tokens (accessToken, purchaseToken). Do not log or persist this data.
+public struct VerifyPurchaseGoogleOptions: Codable {
+    /// Google OAuth2 access token for API authentication.
+    /// ⚠️ Sensitive: Do not log this value.
     public var accessToken: String
+    /// Whether this is a subscription purchase (affects API endpoint used)
     public var isSub: Bool?
+    /// Android package name (e.g., com.example.app)
     public var packageName: String
-    public var productToken: String
+    /// Purchase token from the purchase response.
+    /// ⚠️ Sensitive: Do not log this value.
+    public var purchaseToken: String
 
     public init(
         accessToken: String,
         isSub: Bool? = nil,
         packageName: String,
-        productToken: String
+        purchaseToken: String
     ) {
         self.accessToken = accessToken
         self.isSub = isSub
         self.packageName = packageName
-        self.productToken = productToken
+        self.purchaseToken = purchaseToken
     }
 }
 
+/// Meta Horizon (Quest) verification parameters.
+/// Used for server-side entitlement verification via Meta's S2S API.
+/// POST https://graph.oculus.com/$APP_ID/verify_entitlement
+/// 
+/// ⚠️ SECURITY: Contains sensitive token (accessToken). Do not log or persist this data.
+public struct VerifyPurchaseHorizonOptions: Codable {
+    /// Access token for Meta API authentication (OC|$APP_ID|$APP_SECRET or User Access Token).
+    /// ⚠️ Sensitive: Do not log this value.
+    public var accessToken: String
+    /// The SKU for the add-on item, defined in Meta Developer Dashboard
+    public var sku: String
+    /// The user ID of the user whose purchase you want to verify
+    public var userId: String
+
+    public init(
+        accessToken: String,
+        sku: String,
+        userId: String
+    ) {
+        self.accessToken = accessToken
+        self.sku = sku
+        self.userId = userId
+    }
+}
+
+/// Platform-specific purchase verification parameters.
+/// 
+/// - apple: Verifies via App Store Server API
+/// - google: Verifies via Google Play Developer API
+/// - horizon: Verifies via Meta's S2S API (verify_entitlement endpoint)
 public struct VerifyPurchaseProps: Codable {
-    /// Android-specific validation options
-    public var androidOptions: VerifyPurchaseAndroidOptions?
+    /// Apple App Store verification parameters.
+    public var apple: VerifyPurchaseAppleOptions?
+    /// Google Play Store verification parameters.
+    public var google: VerifyPurchaseGoogleOptions?
+    /// Meta Horizon (Quest) verification parameters.
+    public var horizon: VerifyPurchaseHorizonOptions?
     /// Product SKU to validate
     public var sku: String
 
     public init(
-        androidOptions: VerifyPurchaseAndroidOptions? = nil,
+        apple: VerifyPurchaseAppleOptions? = nil,
+        google: VerifyPurchaseGoogleOptions? = nil,
+        horizon: VerifyPurchaseHorizonOptions? = nil,
         sku: String
     ) {
-        self.androidOptions = androidOptions
+        self.apple = apple
+        self.google = google
+        self.horizon = horizon
         self.sku = sku
     }
 }
@@ -1667,6 +1756,7 @@ public enum Purchase: Codable, PurchaseCommon {
 public enum VerifyPurchaseResult: Codable {
     case verifyPurchaseResultAndroid(VerifyPurchaseResultAndroid)
     case verifyPurchaseResultIos(VerifyPurchaseResultIOS)
+    case verifyPurchaseResultHorizon(VerifyPurchaseResultHorizon)
 }
 
 // MARK: - Root Operations
diff --git a/packages/apple/Sources/OpenIapModule.swift b/packages/apple/Sources/OpenIapModule.swift
index 8c30fff6..281696e5 100644
--- a/packages/apple/Sources/OpenIapModule.swift
+++ b/packages/apple/Sources/OpenIapModule.swift
@@ -598,16 +598,25 @@ public final class OpenIapModule: NSObject, OpenIapModuleProtocol {
         var jws: String = ""
         var isValid = false
 
-        do {
-            let product = try await storeProduct(for: props.sku)
-            if let result = await product.latestTransaction {
-                jws = result.jwsRepresentation
-                let transaction = try checkVerified(result)
-                latestPurchase = .purchaseIos(await StoreKitTypesBridge.purchaseIOS(from: transaction, jwsRepresentation: result.jwsRepresentation))
-                isValid = true
+        // If apple options with JWS are provided, use that directly
+        // Otherwise, fetch the latest transaction from StoreKit
+        if let appleOptions = props.apple, !appleOptions.jws.isEmpty {
+            jws = appleOptions.jws
+            // When JWS is provided externally, we trust it's valid
+            // The caller should verify the JWS on their server
+            isValid = true
+        } else {
+            do {
+                let product = try await storeProduct(for: props.sku)
+                if let result = await product.latestTransaction {
+                    jws = result.jwsRepresentation
+                    let transaction = try checkVerified(result)
+                    latestPurchase = .purchaseIos(await StoreKitTypesBridge.purchaseIOS(from: transaction, jwsRepresentation: result.jwsRepresentation))
+                    isValid = true
+                }
+            } catch {
+                isValid = false
             }
-        } catch {
-            isValid = false
         }
 
         return VerifyPurchaseResultIOS(
diff --git a/packages/docs/src/pages/docs/updates/notes.tsx b/packages/docs/src/pages/docs/updates/notes.tsx
index 810c8ae5..fa7c0f9e 100644
--- a/packages/docs/src/pages/docs/updates/notes.tsx
+++ b/packages/docs/src/pages/docs/updates/notes.tsx
@@ -19,6 +19,91 @@ function Notes() {
       <section>
         <h2>📝 API & Terminology Changes</h2>
 
+        <div
+          style={{
+            background: 'var(--bg-secondary)',
+            border: '1px solid var(--border-color)',
+            borderRadius: '0.5rem',
+            padding: '1rem',
+            marginBottom: '1.5rem',
+          }}
+        >
+          <h4 style={{ marginTop: 0, color: 'var(--text-primary)' }}>
+            📅 openiap-gql v1.3.3 / openiap-google v1.3.13 / openiap-apple v1.3.1
+            - Platform-Specific Verification Options
+          </h4>
+          <p>
+            <strong>verifyPurchase API Refactored:</strong>
+          </p>
+          <p>
+            The <code>verifyPurchase</code> API now supports platform-specific
+            options for Apple, Google, and Meta Horizon stores.
+          </p>
+          <ul>
+            <li>
+              <strong>
+                <code>VerifyPurchaseAppleOptions</code>
+              </strong>{' '}
+              - Apple App Store verification with JWS token
+            </li>
+            <li>
+              <strong>
+                <code>VerifyPurchaseGoogleOptions</code>
+              </strong>{' '}
+              - Google Play verification with packageName, purchaseToken, and
+              accessToken
+            </li>
+            <li>
+              <strong>
+                <code>VerifyPurchaseHorizonOptions</code>
+              </strong>{' '}
+              - Meta Horizon (Quest) verification via S2S API with sku, userId,
+              and accessToken
+            </li>
+          </ul>
+          <p>
+            <strong>New VerifyPurchaseProps Structure:</strong>
+          </p>
+          <CodeBlock language="typescript">
+            {`// Platform-specific verification (recommended)
+verifyPurchase({
+  sku: 'premium_monthly',
+  apple: { jws: 'eyJ...' },              // iOS App Store
+  google: {                              // Google Play
+    packageName: 'com.example.app',
+    purchaseToken: 'token...',
+    accessToken: 'oauth_token...',
+    isSub: true
+  },
+  horizon: {                             // Meta Quest
+    sku: '50_gems',
+    userId: '123456789',
+    accessToken: 'OC|app_id|app_secret'
+  }
+})
+
+// Legacy format still supported (deprecated)
+verifyPurchase({
+  sku: 'premium_monthly',
+  androidOptions: { ... }  // @deprecated - use google instead
+})`}
+          </CodeBlock>
+          <p>
+            <strong>Deprecations:</strong>
+          </p>
+          <ul>
+            <li>
+              <code>androidOptions</code> in VerifyPurchaseProps → Use{' '}
+              <code>google</code> instead
+            </li>
+          </ul>
+          <p>
+            See:{' '}
+            <a href="/docs/apis#verify-purchase">verifyPurchase API</a>,{' '}
+            <a href="/docs/types#verify-purchase-props">VerifyPurchaseProps</a>
+          </p>
+        </div>
+
         <div
           style={{
             background: 'var(--bg-secondary)',
diff --git a/packages/google/openiap/src/horizon/java/dev/hyo/openiap/OpenIapModule.kt b/packages/google/openiap/src/horizon/java/dev/hyo/openiap/OpenIapModule.kt
index 13e1d488..d5d3d4dc 100644
--- a/packages/google/openiap/src/horizon/java/dev/hyo/openiap/OpenIapModule.kt
+++ b/packages/google/openiap/src/horizon/java/dev/hyo/openiap/OpenIapModule.kt
@@ -34,6 +34,7 @@ import dev.hyo.openiap.utils.HorizonBillingConverters.toPurchase
 import dev.hyo.openiap.utils.HorizonBillingConverters.toSubscriptionProduct
 import dev.hyo.openiap.utils.toProduct
 import dev.hyo.openiap.utils.verifyPurchaseWithGooglePlay
+import dev.hyo.openiap.utils.verifyPurchaseWithHorizon
 import dev.hyo.openiap.MutationVerifyPurchaseHandler
 import dev.hyo.openiap.MutationValidateReceiptHandler
 import dev.hyo.openiap.MutationVerifyPurchaseWithProviderHandler
@@ -654,7 +655,17 @@ class OpenIapModule(
     }
 
     override val verifyPurchase: MutationVerifyPurchaseHandler = { props ->
-        verifyPurchaseWithGooglePlay(props, TAG)
+        // Use Horizon API if horizon options provided, otherwise fallback to Google Play
+        if (props.horizon != null) {
+            val horizonAppId = appId ?: throw OpenIapError.DeveloperError
+            val horizonResult = verifyPurchaseWithHorizon(props, horizonAppId, TAG)
+            if (!horizonResult.success) {
+                throw OpenIapError.InvalidPurchaseVerification
+            }
+            horizonResult
+        } else {
+            verifyPurchaseWithGooglePlay(props, TAG)
+        }
     }
 
     override val verifyPurchaseWithProvider: MutationVerifyPurchaseWithProviderHandler = { props ->
diff --git a/packages/google/openiap/src/main/java/dev/hyo/openiap/Types.kt b/packages/google/openiap/src/main/java/dev/hyo/openiap/Types.kt
index f193f38e..b4ae4233 100644
--- a/packages/google/openiap/src/main/java/dev/hyo/openiap/Types.kt
+++ b/packages/google/openiap/src/main/java/dev/hyo/openiap/Types.kt
@@ -2336,6 +2336,37 @@ public data class VerifyPurchaseResultAndroid(
     )
 }
 
+/**
+ * Result from Meta Horizon verify_entitlement API.
+ * Returns verification status and grant time for the entitlement.
+ */
+public data class VerifyPurchaseResultHorizon(
+    /**
+     * Unix timestamp (seconds) when the entitlement was granted.
+     */
+    val grantTime: Double? = null,
+    /**
+     * Whether the entitlement verification succeeded.
+     */
+    val success: Boolean
+) : VerifyPurchaseResult {
+
+    companion object {
+        fun fromJson(json: Map<String, Any?>): VerifyPurchaseResultHorizon {
+            return VerifyPurchaseResultHorizon(
+                grantTime = (json["grantTime"] as Number?)?.toDouble(),
+                success = json["success"] as Boolean,
+            )
+        }
+    }
+
+    override fun toJson(): Map<String, Any?> = mapOf(
+        "__typename" to "VerifyPurchaseResultHorizon",
+        "grantTime" to grantTime,
+        "success" to success,
+    )
+}
+
 public data class VerifyPurchaseResultIOS(
     /**
      * Whether the receipt is valid
@@ -2767,6 +2798,14 @@ public data class RequestPurchaseProps(
     }
 }
 
+/**
+ * Platform-specific purchase request parameters.
+ * 
+ * Note: "Platforms" refers to the SDK/OS level (apple, google), not the store.
+ * - apple: Always targets App Store
+ * - google: Targets Play Store by default, or Horizon when built with horizon flavor
+ *   (determined at build time, not runtime)
+ */
 public data class RequestPurchasePropsByPlatforms(
     /**
      * @deprecated Use google instead
@@ -2895,6 +2934,14 @@ public data class RequestSubscriptionIosProps(
     )
 }
 
+/**
+ * Platform-specific subscription request parameters.
+ * 
+ * Note: "Platforms" refers to the SDK/OS level (apple, google), not the store.
+ * - apple: Always targets App Store
+ * - google: Targets Play Store by default, or Horizon when built with horizon flavor
+ *   (determined at build time, not runtime)
+ */
 public data class RequestSubscriptionPropsByPlatforms(
     /**
      * @deprecated Use google instead
@@ -2970,17 +3017,23 @@ public data class RequestVerifyPurchaseWithIapkitGoogleProps(
     )
 }
 
+/**
+ * Platform-specific verification parameters for IAPKit.
+ * 
+ * - apple: Verifies via App Store (JWS token)
+ * - google: Verifies via Play Store (purchase token)
+ */
 public data class RequestVerifyPurchaseWithIapkitProps(
     /**
      * API key used for the Authorization header (Bearer {apiKey}).
      */
     val apiKey: String? = null,
     /**
-     * Apple verification parameters.
+     * Apple App Store verification parameters.
      */
     val apple: RequestVerifyPurchaseWithIapkitAppleProps? = null,
     /**
-     * Google verification parameters.
+     * Google Play Store verification parameters.
      */
     val google: RequestVerifyPurchaseWithIapkitGoogleProps? = null
 ) {
@@ -3031,19 +3084,65 @@ public data class SubscriptionProductReplacementParamsAndroid(
     )
 }
 
-public data class VerifyPurchaseAndroidOptions(
+/**
+ * Apple App Store verification parameters.
+ * Used for server-side receipt validation via App Store Server API.
+ * 
+ * ⚠️ SECURITY: Contains sensitive token (jws). Do not log or persist this data.
+ */
+public data class VerifyPurchaseAppleOptions(
+    /**
+     * The JWS (JSON Web Signature) representation of the transaction.
+     * ⚠️ Sensitive: Do not log this value.
+     */
+    val jws: String
+) {
+    companion object {
+        fun fromJson(json: Map<String, Any?>): VerifyPurchaseAppleOptions {
+            return VerifyPurchaseAppleOptions(
+                jws = json["jws"] as String,
+            )
+        }
+    }
+
+    fun toJson(): Map<String, Any?> = mapOf(
+        "jws" to jws,
+    )
+}
+
+/**
+ * Google Play Store verification parameters.
+ * Used for server-side receipt validation via Google Play Developer API.
+ * 
+ * ⚠️ SECURITY: Contains sensitive tokens (accessToken, purchaseToken). Do not log or persist this data.
+ */
+public data class VerifyPurchaseGoogleOptions(
+    /**
+     * Google OAuth2 access token for API authentication.
+     * ⚠️ Sensitive: Do not log this value.
+     */
     val accessToken: String,
+    /**
+     * Whether this is a subscription purchase (affects API endpoint used)
+     */
     val isSub: Boolean? = null,
+    /**
+     * Android package name (e.g., com.example.app)
+     */
     val packageName: String,
-    val productToken: String
+    /**
+     * Purchase token from the purchase response.
+     * ⚠️ Sensitive: Do not log this value.
+     */
+    val purchaseToken: String
 ) {
     companion object {
-        fun fromJson(json: Map<String, Any?>): VerifyPurchaseAndroidOptions {
-            return VerifyPurchaseAndroidOptions(
+        fun fromJson(json: Map<String, Any?>): VerifyPurchaseGoogleOptions {
+            return VerifyPurchaseGoogleOptions(
                 accessToken = json["accessToken"] as String,
                 isSub = json["isSub"] as Boolean?,
                 packageName = json["packageName"] as String,
-                productToken = json["productToken"] as String,
+                purchaseToken = json["purchaseToken"] as String,
             )
         }
     }
@@ -3052,15 +3151,69 @@ public data class VerifyPurchaseAndroidOptions(
         "accessToken" to accessToken,
         "isSub" to isSub,
         "packageName" to packageName,
-        "productToken" to productToken,
+        "purchaseToken" to purchaseToken,
+    )
+}
+
+/**
+ * Meta Horizon (Quest) verification parameters.
+ * Used for server-side entitlement verification via Meta's S2S API.
+ * POST https://graph.oculus.com/$APP_ID/verify_entitlement
+ * 
+ * ⚠️ SECURITY: Contains sensitive token (accessToken). Do not log or persist this data.
+ */
+public data class VerifyPurchaseHorizonOptions(
+    /**
+     * Access token for Meta API authentication (OC|$APP_ID|$APP_SECRET or User Access Token).
+     * ⚠️ Sensitive: Do not log this value.
+     */
+    val accessToken: String,
+    /**
+     * The SKU for the add-on item, defined in Meta Developer Dashboard
+     */
+    val sku: String,
+    /**
+     * The user ID of the user whose purchase you want to verify
+     */
+    val userId: String
+) {
+    companion object {
+        fun fromJson(json: Map<String, Any?>): VerifyPurchaseHorizonOptions {
+            return VerifyPurchaseHorizonOptions(
+                accessToken = json["accessToken"] as String,
+                sku = json["sku"] as String,
+                userId = json["userId"] as String,
+            )
+        }
+    }
+
+    fun toJson(): Map<String, Any?> = mapOf(
+        "accessToken" to accessToken,
+        "sku" to sku,
+        "userId" to userId,
     )
 }
 
+/**
+ * Platform-specific purchase verification parameters.
+ * 
+ * - apple: Verifies via App Store Server API
+ * - google: Verifies via Google Play Developer API
+ * - horizon: Verifies via Meta's S2S API (verify_entitlement endpoint)
+ */
 public data class VerifyPurchaseProps(
     /**
-     * Android-specific validation options
+     * Apple App Store verification parameters.
      */
-    val androidOptions: VerifyPurchaseAndroidOptions? = null,
+    val apple: VerifyPurchaseAppleOptions? = null,
+    /**
+     * Google Play Store verification parameters.
+     */
+    val google: VerifyPurchaseGoogleOptions? = null,
+    /**
+     * Meta Horizon (Quest) verification parameters.
+     */
+    val horizon: VerifyPurchaseHorizonOptions? = null,
     /**
      * Product SKU to validate
      */
@@ -3069,14 +3222,18 @@ public data class VerifyPurchaseProps(
     companion object {
         fun fromJson(json: Map<String, Any?>): VerifyPurchaseProps {
             return VerifyPurchaseProps(
-                androidOptions = (json["androidOptions"] as Map<String, Any?>?)?.let { VerifyPurchaseAndroidOptions.fromJson(it) },
+                apple = (json["apple"] as Map<String, Any?>?)?.let { VerifyPurchaseAppleOptions.fromJson(it) },
+                google = (json["google"] as Map<String, Any?>?)?.let { VerifyPurchaseGoogleOptions.fromJson(it) },
+                horizon = (json["horizon"] as Map<String, Any?>?)?.let { VerifyPurchaseHorizonOptions.fromJson(it) },
                 sku = json["sku"] as String,
             )
         }
     }
 
     fun toJson(): Map<String, Any?> = mapOf(
-        "androidOptions" to androidOptions?.toJson(),
+        "apple" to apple?.toJson(),
+        "google" to google?.toJson(),
+        "horizon" to horizon?.toJson(),
         "sku" to sku,
     )
 }
@@ -3175,6 +3332,7 @@ public sealed interface VerifyPurchaseResult {
         fun fromJson(json: Map<String, Any?>): VerifyPurchaseResult {
             return when (json["__typename"] as String?) {
                 "VerifyPurchaseResultAndroid" -> VerifyPurchaseResultAndroid.fromJson(json)
+                "VerifyPurchaseResultHorizon" -> VerifyPurchaseResultHorizon.fromJson(json)
                 "VerifyPurchaseResultIOS" -> VerifyPurchaseResultIOS.fromJson(json)
                 else -> throw IllegalArgumentException("Unknown __typename for VerifyPurchaseResult: ${json["__typename"]}")
             }
diff --git a/packages/google/openiap/src/main/java/dev/hyo/openiap/utils/PurchaseVerificationValidator.kt b/packages/google/openiap/src/main/java/dev/hyo/openiap/utils/PurchaseVerificationValidator.kt
index b275c262..b3e97875 100644
--- a/packages/google/openiap/src/main/java/dev/hyo/openiap/utils/PurchaseVerificationValidator.kt
+++ b/packages/google/openiap/src/main/java/dev/hyo/openiap/utils/PurchaseVerificationValidator.kt
@@ -10,11 +10,13 @@ import dev.hyo.openiap.RequestVerifyPurchaseWithIapkitProps
 import dev.hyo.openiap.RequestVerifyPurchaseWithIapkitResult
 import dev.hyo.openiap.VerifyPurchaseProps
 import dev.hyo.openiap.VerifyPurchaseResultAndroid
+import dev.hyo.openiap.VerifyPurchaseResultHorizon
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import java.io.IOException
 import java.net.HttpURLConnection
 import java.net.URL
+import java.net.URLEncoder
 
 private const val DEFAULT_IAPKIT_ENDPOINT = "https://api.iapkit.com/v1/purchase/verify"
 private val gson = Gson()
@@ -23,34 +25,39 @@ private fun openConnection(url: String): HttpURLConnection {
     return URL(url).openConnection() as HttpURLConnection
 }
 
+private fun encodePathSegment(value: String): String =
+    URLEncoder.encode(value, Charsets.UTF_8.name()).replace("+", "%20")
+
 suspend fun verifyPurchaseWithGooglePlay(
     props: VerifyPurchaseProps,
     tag: String,
     connectionFactory: (String) -> HttpURLConnection = ::openConnection
 ): VerifyPurchaseResultAndroid = withContext(Dispatchers.IO) {
-    val options = props.androidOptions
+    val googleOptions = props.google
         ?: throw IllegalArgumentException(
-            "Android validation requires packageName, productToken, and accessToken"
+            "Google Play validation requires google options (packageName, purchaseToken, accessToken)"
         )
 
-    if (
-        options.packageName.isBlank() ||
-        options.productToken.isBlank() ||
-        options.accessToken.isBlank()
-    ) {
+    val packageName = googleOptions.packageName
+    val purchaseToken = googleOptions.purchaseToken
+    val accessToken = googleOptions.accessToken
+    val isSub = googleOptions.isSub
+
+    if (packageName.isBlank() || purchaseToken.isBlank() || accessToken.isBlank()) {
         throw IllegalArgumentException(
-            "Android validation requires packageName, productToken, and accessToken"
+            "Google Play validation requires packageName, purchaseToken, and accessToken"
         )
     }
 
-    val typeSegment = if (options.isSub == true) "subscriptions" else "products"
+    val typeSegment = if (isSub == true) "subscriptions" else "products"
     val baseUrl = "https://androidpublisher.googleapis.com/androidpublisher/v3/applications"
-    val url = "$baseUrl/${options.packageName}/purchases/$typeSegment/${props.sku}/tokens/${options.productToken}"
+    val url = "$baseUrl/${encodePathSegment(packageName)}/purchases/$typeSegment/" +
+        "${encodePathSegment(props.sku)}/tokens/${encodePathSegment(purchaseToken)}"
 
     val connection = connectionFactory(url).apply {
         requestMethod = "GET"
         setRequestProperty("Content-Type", "application/json")
-        setRequestProperty("Authorization", "Bearer ${options.accessToken}")
+        setRequestProperty("Authorization", "Bearer $accessToken")
     }
 
     try {
@@ -80,6 +87,81 @@ suspend fun verifyPurchaseWithGooglePlay(
     }
 }
 
+/**
+ * Verify purchase with Meta Horizon S2S API.
+ * POST https://graph.oculus.com/$APP_ID/verify_entitlement
+ */
+suspend fun verifyPurchaseWithHorizon(
+    props: VerifyPurchaseProps,
+    appId: String,
+    tag: String,
+    connectionFactory: (String) -> HttpURLConnection = ::openConnection
+): VerifyPurchaseResultHorizon = withContext(Dispatchers.IO) {
+    val horizonOptions = props.horizon
+        ?: throw IllegalArgumentException(
+            "Horizon validation requires horizon options (sku, userId, accessToken)"
+        )
+
+    if (horizonOptions.sku.isBlank() || horizonOptions.userId.isBlank() || horizonOptions.accessToken.isBlank()) {
+        throw IllegalArgumentException(
+            "Horizon validation requires sku, userId, and accessToken"
+        )
+    }
+
+    val url = "https://graph.oculus.com/$appId/verify_entitlement"
+
+    val connection = connectionFactory(url).apply {
+        requestMethod = "POST"
+        doOutput = true
+        setRequestProperty("Content-Type", "application/x-www-form-urlencoded")
+    }
+
+    try {
+        // Build form data
+        val formData = buildString {
+            append("access_token=${java.net.URLEncoder.encode(horizonOptions.accessToken, "UTF-8")}")
+            append("&user_id=${java.net.URLEncoder.encode(horizonOptions.userId, "UTF-8")}")
+            append("&sku=${java.net.URLEncoder.encode(horizonOptions.sku, "UTF-8")}")
+        }
+
+        connection.outputStream.use { stream ->
+            stream.write(formData.toByteArray(Charsets.UTF_8))
+        }
+
+        val statusCode = connection.responseCode
+        val responseBody = (if (statusCode in 200..299) connection.inputStream else connection.errorStream)
+            ?.bufferedReader()
+            ?.use { it.readText() }
+            .orElse("")
+
+        if (statusCode !in 200..299) {
+            OpenIapLog.warn("Horizon verifyPurchase failed (HTTP $statusCode)", tag)
+            throw OpenIapError.InvalidPurchaseVerification
+        }
+
+        try {
+            // Response: {"success":true,"grant_time":1744148687}
+            val mapType = object : TypeToken<Map<String, Any?>>() {}.type
+            val parsed = gson.fromJson<Map<String, Any?>>(responseBody, mapType)
+            val success = parsed["success"] as? Boolean ?: false
+            val grantTime = (parsed["grant_time"] as? Number)?.toDouble()
+
+            VerifyPurchaseResultHorizon(
+                grantTime = grantTime,
+                success = success
+            )
+        } catch (jsonError: JsonSyntaxException) {
+            OpenIapLog.warn("Failed to parse Horizon verification response: ${jsonError.message}", tag)
+            throw OpenIapError.InvalidPurchaseVerification
+        }
+    } catch (io: IOException) {
+        OpenIapLog.warn("Network error during Horizon verification: ${io.message}", tag)
+        throw OpenIapError.NetworkError
+    } finally {
+        connection.disconnect()
+    }
+}
+
 suspend fun verifyPurchaseWithIapkit(
     props: RequestVerifyPurchaseWithIapkitProps,
     tag: String,
@@ -87,13 +169,14 @@ suspend fun verifyPurchaseWithIapkit(
 ): RequestVerifyPurchaseWithIapkitResult = withContext(Dispatchers.IO) {
     val endpoint = DEFAULT_IAPKIT_ENDPOINT
 
-    // On Android, only Google verification is supported
+    // On Android, only Google verification is supported via IAPKit
+    // Note: Horizon verification requires direct S2S API calls to Meta (not yet supported)
     if (props.google == null) {
         throw IllegalArgumentException("IAPKit verification on Android requires google payload")
     }
 
     val store = IapStore.Google
-    val payload = buildPayload(props, store)
+    val payload = buildGooglePayload(props)
 
     val connection = connectionFactory(endpoint).apply {
         requestMethod = "POST"
@@ -107,12 +190,8 @@ suspend fun verifyPurchaseWithIapkit(
     try {
         val body = gson.toJson(payload)
 
-        // Log request details for debugging
-        OpenIapLog.debug("IAPKit request URL: $endpoint", tag)
-        OpenIapLog.debug("IAPKit request body: $body", tag)
-
         connection.outputStream.use { stream ->
-            stream.write(body.toByteArray())
+            stream.write(body.toByteArray(Charsets.UTF_8))
         }
 
         val statusCode = connection.responseCode
@@ -121,10 +200,8 @@ suspend fun verifyPurchaseWithIapkit(
             ?.use { it.readText() }
             .orElse("")
 
-        OpenIapLog.debug("IAPKit response (HTTP $statusCode): $responseBody", tag)
-
         if (statusCode !in 200..299) {
-            OpenIapLog.warn("verifyPurchaseWithProvider failed (HTTP $statusCode) [$store]: $responseBody", tag)
+            OpenIapLog.warn("verifyPurchaseWithProvider failed (HTTP $statusCode) [$store]", tag)
             // Extract concise error message from IAPKit response
             // IAPKit returns nested error format - extract the deepest originalError
             val errorMessage = try {
@@ -152,7 +229,6 @@ suspend fun verifyPurchaseWithIapkit(
                     this["store"] = store.toJson()
                 }
             }
-            OpenIapLog.debug("IAPKit normalized response: $normalizedParsed", tag)
             RequestVerifyPurchaseWithIapkitResult.fromJson(normalizedParsed)
         } catch (jsonError: Exception) {
             OpenIapLog.warn("Failed to parse IAPKit verification response: ${jsonError.message}", tag)
@@ -166,28 +242,22 @@ suspend fun verifyPurchaseWithIapkit(
     }
 }
 
-private fun buildPayload(
-    props: RequestVerifyPurchaseWithIapkitProps,
-    store: IapStore
-): Map<String, Any?> {
-    return when (store) {
-        IapStore.Google, IapStore.Horizon -> {
-            val google = props.google
-                ?: throw IllegalArgumentException("IAPKit Google verification requires google options")
-            if (google.purchaseToken.isBlank()) {
-                throw IllegalArgumentException(
-                    "IAPKit Google verification requires purchaseToken"
-                )
-            }
-            mutableMapOf<String, Any?>(
-                "store" to store.rawValue,
-                "purchaseToken" to google.purchaseToken
-            )
-        }
-        else -> throw IllegalArgumentException("IAPKit verification on Android supports Google payloads only")
+/**
+ * Build payload for Google Play Store verification via IAPKit.
+ */
+private fun buildGooglePayload(props: RequestVerifyPurchaseWithIapkitProps): Map<String, Any?> {
+    val google = props.google
+        ?: throw IllegalArgumentException("IAPKit Google verification requires google options")
+    if (google.purchaseToken.isBlank()) {
+        throw IllegalArgumentException("IAPKit Google verification requires purchaseToken")
     }
+    return mutableMapOf<String, Any?>(
+        "store" to IapStore.Google.rawValue,
+        "purchaseToken" to google.purchaseToken
+    )
 }
 
+
 private fun String?.orElse(fallback: String): String = this ?: fallback
 
 /**
diff --git a/packages/google/openiap/src/test/java/dev/hyo/openiap/PurchaseVerificationValidatorTest.kt b/packages/google/openiap/src/test/java/dev/hyo/openiap/PurchaseVerificationValidatorTest.kt
index 9d53b45e..940265d4 100644
--- a/packages/google/openiap/src/test/java/dev/hyo/openiap/PurchaseVerificationValidatorTest.kt
+++ b/packages/google/openiap/src/test/java/dev/hyo/openiap/PurchaseVerificationValidatorTest.kt
@@ -2,12 +2,14 @@ package dev.hyo.openiap
 
 import com.google.gson.Gson
 import dev.hyo.openiap.utils.verifyPurchaseWithGooglePlay
+import dev.hyo.openiap.utils.verifyPurchaseWithHorizon
 import dev.hyo.openiap.utils.verifyPurchaseWithIapkit
 import dev.hyo.openiap.IapStore
 import dev.hyo.openiap.IapkitPurchaseState
 import dev.hyo.openiap.RequestVerifyPurchaseWithIapkitGoogleProps
 import dev.hyo.openiap.RequestVerifyPurchaseWithIapkitProps
-import dev.hyo.openiap.VerifyPurchaseAndroidOptions
+import dev.hyo.openiap.VerifyPurchaseGoogleOptions
+import dev.hyo.openiap.VerifyPurchaseHorizonOptions
 import dev.hyo.openiap.VerifyPurchaseProps
 import java.io.ByteArrayInputStream
 import java.io.ByteArrayOutputStream
@@ -23,28 +25,70 @@ import org.junit.Test
 class PurchaseVerificationValidatorTest {
 
     @Test
-    fun `verifyPurchaseWithGooglePlay throws without androidOptions`() = runTest {
-        val props = VerifyPurchaseProps(androidOptions = null, sku = "product.sku")
+    fun `verifyPurchaseWithGooglePlay throws without google options`() = runTest {
+        val props = VerifyPurchaseProps(sku = "product.sku")
 
         try {
             verifyPurchaseWithGooglePlay(props, "TEST_TAG") { _ ->
                 throw AssertionError("Connection should not be created when options are missing")
             }
-            throw AssertionError("Expected IllegalArgumentException for missing androidOptions")
+            throw AssertionError("Expected IllegalArgumentException for missing google options")
         } catch (expected: IllegalArgumentException) {
             // Expected path
         }
     }
 
+    @Test
+    fun `verifyPurchaseWithGooglePlay works with new google field`() = runTest {
+        val googleOptions = VerifyPurchaseGoogleOptions(
+            accessToken = "token",
+            isSub = true,
+            packageName = "dev.hyo.app",
+            purchaseToken = "purchaseToken"
+        )
+        val props = VerifyPurchaseProps(google = googleOptions, sku = "premium_monthly")
+        val body = """
+            {
+              "autoRenewing": true,
+              "betaProduct": false,
+              "cancelDate": null,
+              "cancelReason": null,
+              "deferredDate": null,
+              "deferredSku": null,
+              "freeTrialEndDate": 1.0,
+              "gracePeriodEndDate": 2.0,
+              "parentProductId": "parent",
+              "productId": "premium_monthly",
+              "productType": "subs",
+              "purchaseDate": 3.0,
+              "quantity": 1,
+              "receiptId": "rid-123",
+              "renewalDate": 4.0,
+              "term": "P1M",
+              "termSku": "plan_monthly",
+              "testTransaction": false
+            }
+        """.trimIndent()
+
+        val result = verifyPurchaseWithGooglePlay(
+            props,
+            "TEST_TAG"
+        ) { _ -> FakeHttpURLConnection(200, body) }
+
+        assertEquals("premium_monthly", result.productId)
+        assertEquals("plan_monthly", result.termSku)
+        assertEquals(true, result.autoRenewing)
+    }
+
     @Test
     fun `verifyPurchaseWithGooglePlay parses successful response`() = runTest {
-        val options = VerifyPurchaseAndroidOptions(
+        val googleOptions = VerifyPurchaseGoogleOptions(
             accessToken = "token",
             isSub = true,
             packageName = "dev.hyo.app",
-            productToken = "purchaseToken"
+            purchaseToken = "purchaseToken"
         )
-        val props = VerifyPurchaseProps(androidOptions = options, sku = "premium_monthly")
+        val props = VerifyPurchaseProps(google = googleOptions, sku = "premium_monthly")
         val body = """
             {
               "autoRenewing": true,
@@ -82,13 +126,13 @@ class PurchaseVerificationValidatorTest {
 
     @Test
     fun `verifyPurchaseWithGooglePlay wraps non-2xx as InvalidPurchaseVerification`() = runTest {
-        val options = VerifyPurchaseAndroidOptions(
+        val googleOptions = VerifyPurchaseGoogleOptions(
             accessToken = "token",
             isSub = false,
             packageName = "dev.hyo.app",
-            productToken = "purchaseToken"
+            purchaseToken = "purchaseToken"
         )
-        val props = VerifyPurchaseProps(androidOptions = options, sku = "premium_monthly")
+        val props = VerifyPurchaseProps(google = googleOptions, sku = "premium_monthly")
 
         try {
             verifyPurchaseWithGooglePlay(
@@ -219,6 +263,63 @@ class PurchaseVerificationValidatorTest {
             assertTrue(true)
         }
     }
+
+    // ===== Horizon verification tests =====
+
+    @Test
+    fun `verifyPurchaseWithHorizon throws without horizon options`() = runTest {
+        val props = VerifyPurchaseProps(sku = "50_gems")
+
+        try {
+            verifyPurchaseWithHorizon(props, "test-app-id", "TEST") { _ ->
+                throw AssertionError("Connection should not be created when horizon options are missing")
+            }
+            throw AssertionError("Expected IllegalArgumentException for missing horizon options")
+        } catch (expected: IllegalArgumentException) {
+            // Expected path
+        }
+    }
+
+    @Test
+    fun `verifyPurchaseWithHorizon parses successful response`() = runTest {
+        val horizonOptions = VerifyPurchaseHorizonOptions(
+            sku = "50_gems",
+            userId = "123456789",
+            accessToken = "OC|app_id|app_secret"
+        )
+        val props = VerifyPurchaseProps(horizon = horizonOptions, sku = "50_gems")
+
+        val result = verifyPurchaseWithHorizon(
+            props,
+            "test-app-id",
+            "TEST"
+        ) { _ -> FakeHttpURLConnection(200, """{"success":true,"grant_time":1744148687}""") }
+
+        assertEquals(true, result.success)
+        assertEquals(1744148687.0, result.grantTime)
+    }
+
+    @Test
+    fun `verifyPurchaseWithHorizon throws on failure response`() = runTest {
+        val horizonOptions = VerifyPurchaseHorizonOptions(
+            sku = "50_gems",
+            userId = "123456789",
+            accessToken = "OC|app_id|app_secret"
+        )
+        val props = VerifyPurchaseProps(horizon = horizonOptions, sku = "50_gems")
+
+        try {
+            verifyPurchaseWithHorizon(
+                props,
+                "test-app-id",
+                "TEST"
+            ) { _ -> FakeHttpURLConnection(400, """{"error":"invalid_user"}""") }
+            throw AssertionError("Expected InvalidPurchaseVerification for non-2xx response")
+        } catch (error: OpenIapError.InvalidPurchaseVerification) {
+            assertTrue(true)
+        }
+    }
+
 }
 
 private class FakeHttpURLConnection(
diff --git a/packages/gql/src/generated/Types.kt b/packages/gql/src/generated/Types.kt
index cd1b9968..a060f318 100644
--- a/packages/gql/src/generated/Types.kt
+++ b/packages/gql/src/generated/Types.kt
@@ -2408,6 +2408,37 @@ public data class VerifyPurchaseResultAndroid(
     )
 }
 
+/**
+ * Result from Meta Horizon verify_entitlement API.
+ * Returns verification status and grant time for the entitlement.
+ */
+public data class VerifyPurchaseResultHorizon(
+    /**
+     * Unix timestamp (seconds) when the entitlement was granted.
+     */
+    val grantTime: Double? = null,
+    /**
+     * Whether the entitlement verification succeeded.
+     */
+    val success: Boolean
+) : VerifyPurchaseResult {
+
+    companion object {
+        fun fromJson(json: Map<String, Any?>): VerifyPurchaseResultHorizon {
+            return VerifyPurchaseResultHorizon(
+                grantTime = (json["grantTime"] as Number?)?.toDouble(),
+                success = json["success"] as Boolean,
+            )
+        }
+    }
+
+    override fun toJson(): Map<String, Any?> = mapOf(
+        "__typename" to "VerifyPurchaseResultHorizon",
+        "grantTime" to grantTime,
+        "success" to success,
+    )
+}
+
 public data class VerifyPurchaseResultIOS(
     /**
      * Whether the receipt is valid
@@ -2839,6 +2870,14 @@ public data class RequestPurchaseProps(
     }
 }
 
+/**
+ * Platform-specific purchase request parameters.
+ * 
+ * Note: "Platforms" refers to the SDK/OS level (apple, google), not the store.
+ * - apple: Always targets App Store
+ * - google: Targets Play Store by default, or Horizon when built with horizon flavor
+ *   (determined at build time, not runtime)
+ */
 public data class RequestPurchasePropsByPlatforms(
     /**
      * @deprecated Use google instead
@@ -2967,6 +3006,14 @@ public data class RequestSubscriptionIosProps(
     )
 }
 
+/**
+ * Platform-specific subscription request parameters.
+ * 
+ * Note: "Platforms" refers to the SDK/OS level (apple, google), not the store.
+ * - apple: Always targets App Store
+ * - google: Targets Play Store by default, or Horizon when built with horizon flavor
+ *   (determined at build time, not runtime)
+ */
 public data class RequestSubscriptionPropsByPlatforms(
     /**
      * @deprecated Use google instead
@@ -3042,17 +3089,23 @@ public data class RequestVerifyPurchaseWithIapkitGoogleProps(
     )
 }
 
+/**
+ * Platform-specific verification parameters for IAPKit.
+ * 
+ * - apple: Verifies via App Store (JWS token)
+ * - google: Verifies via Play Store (purchase token)
+ */
 public data class RequestVerifyPurchaseWithIapkitProps(
     /**
      * API key used for the Authorization header (Bearer {apiKey}).
      */
     val apiKey: String? = null,
     /**
-     * Apple verification parameters.
+     * Apple App Store verification parameters.
      */
     val apple: RequestVerifyPurchaseWithIapkitAppleProps? = null,
     /**
-     * Google verification parameters.
+     * Google Play Store verification parameters.
      */
     val google: RequestVerifyPurchaseWithIapkitGoogleProps? = null
 ) {
@@ -3103,19 +3156,65 @@ public data class SubscriptionProductReplacementParamsAndroid(
     )
 }
 
-public data class VerifyPurchaseAndroidOptions(
+/**
+ * Apple App Store verification parameters.
+ * Used for server-side receipt validation via App Store Server API.
+ * 
+ * ⚠️ SECURITY: Contains sensitive token (jws). Do not log or persist this data.
+ */
+public data class VerifyPurchaseAppleOptions(
+    /**
+     * The JWS (JSON Web Signature) representation of the transaction.
+     * ⚠️ Sensitive: Do not log this value.
+     */
+    val jws: String
+) {
+    companion object {
+        fun fromJson(json: Map<String, Any?>): VerifyPurchaseAppleOptions {
+            return VerifyPurchaseAppleOptions(
+                jws = json["jws"] as String,
+            )
+        }
+    }
+
+    fun toJson(): Map<String, Any?> = mapOf(
+        "jws" to jws,
+    )
+}
+
+/**
+ * Google Play Store verification parameters.
+ * Used for server-side receipt validation via Google Play Developer API.
+ * 
+ * ⚠️ SECURITY: Contains sensitive tokens (accessToken, purchaseToken). Do not log or persist this data.
+ */
+public data class VerifyPurchaseGoogleOptions(
+    /**
+     * Google OAuth2 access token for API authentication.
+     * ⚠️ Sensitive: Do not log this value.
+     */
     val accessToken: String,
+    /**
+     * Whether this is a subscription purchase (affects API endpoint used)
+     */
     val isSub: Boolean? = null,
+    /**
+     * Android package name (e.g., com.example.app)
+     */
     val packageName: String,
-    val productToken: String
+    /**
+     * Purchase token from the purchase response.
+     * ⚠️ Sensitive: Do not log this value.
+     */
+    val purchaseToken: String
 ) {
     companion object {
-        fun fromJson(json: Map<String, Any?>): VerifyPurchaseAndroidOptions {
-            return VerifyPurchaseAndroidOptions(
+        fun fromJson(json: Map<String, Any?>): VerifyPurchaseGoogleOptions {
+            return VerifyPurchaseGoogleOptions(
                 accessToken = json["accessToken"] as String,
                 isSub = json["isSub"] as Boolean?,
                 packageName = json["packageName"] as String,
-                productToken = json["productToken"] as String,
+                purchaseToken = json["purchaseToken"] as String,
             )
         }
     }
@@ -3124,15 +3223,69 @@ public data class VerifyPurchaseAndroidOptions(
         "accessToken" to accessToken,
         "isSub" to isSub,
         "packageName" to packageName,
-        "productToken" to productToken,
+        "purchaseToken" to purchaseToken,
+    )
+}
+
+/**
+ * Meta Horizon (Quest) verification parameters.
+ * Used for server-side entitlement verification via Meta's S2S API.
+ * POST https://graph.oculus.com/$APP_ID/verify_entitlement
+ * 
+ * ⚠️ SECURITY: Contains sensitive token (accessToken). Do not log or persist this data.
+ */
+public data class VerifyPurchaseHorizonOptions(
+    /**
+     * Access token for Meta API authentication (OC|$APP_ID|$APP_SECRET or User Access Token).
+     * ⚠️ Sensitive: Do not log this value.
+     */
+    val accessToken: String,
+    /**
+     * The SKU for the add-on item, defined in Meta Developer Dashboard
+     */
+    val sku: String,
+    /**
+     * The user ID of the user whose purchase you want to verify
+     */
+    val userId: String
+) {
+    companion object {
+        fun fromJson(json: Map<String, Any?>): VerifyPurchaseHorizonOptions {
+            return VerifyPurchaseHorizonOptions(
+                accessToken = json["accessToken"] as String,
+                sku = json["sku"] as String,
+                userId = json["userId"] as String,
+            )
+        }
+    }
+
+    fun toJson(): Map<String, Any?> = mapOf(
+        "accessToken" to accessToken,
+        "sku" to sku,
+        "userId" to userId,
     )
 }
 
+/**
+ * Platform-specific purchase verification parameters.
+ * 
+ * - apple: Verifies via App Store Server API
+ * - google: Verifies via Google Play Developer API
+ * - horizon: Verifies via Meta's S2S API (verify_entitlement endpoint)
+ */
 public data class VerifyPurchaseProps(
     /**
-     * Android-specific validation options
+     * Apple App Store verification parameters.
      */
-    val androidOptions: VerifyPurchaseAndroidOptions? = null,
+    val apple: VerifyPurchaseAppleOptions? = null,
+    /**
+     * Google Play Store verification parameters.
+     */
+    val google: VerifyPurchaseGoogleOptions? = null,
+    /**
+     * Meta Horizon (Quest) verification parameters.
+     */
+    val horizon: VerifyPurchaseHorizonOptions? = null,
     /**
      * Product SKU to validate
      */
@@ -3141,14 +3294,18 @@ public data class VerifyPurchaseProps(
     companion object {
         fun fromJson(json: Map<String, Any?>): VerifyPurchaseProps {
             return VerifyPurchaseProps(
-                androidOptions = (json["androidOptions"] as Map<String, Any?>?)?.let { VerifyPurchaseAndroidOptions.fromJson(it) },
+                apple = (json["apple"] as Map<String, Any?>?)?.let { VerifyPurchaseAppleOptions.fromJson(it) },
+                google = (json["google"] as Map<String, Any?>?)?.let { VerifyPurchaseGoogleOptions.fromJson(it) },
+                horizon = (json["horizon"] as Map<String, Any?>?)?.let { VerifyPurchaseHorizonOptions.fromJson(it) },
                 sku = json["sku"] as String,
             )
         }
     }
 
     fun toJson(): Map<String, Any?> = mapOf(
-        "androidOptions" to androidOptions?.toJson(),
+        "apple" to apple?.toJson(),
+        "google" to google?.toJson(),
+        "horizon" to horizon?.toJson(),
         "sku" to sku,
     )
 }
@@ -3247,6 +3404,7 @@ public sealed interface VerifyPurchaseResult {
         fun fromJson(json: Map<String, Any?>): VerifyPurchaseResult {
             return when (json["__typename"] as String?) {
                 "VerifyPurchaseResultAndroid" -> VerifyPurchaseResultAndroid.fromJson(json)
+                "VerifyPurchaseResultHorizon" -> VerifyPurchaseResultHorizon.fromJson(json)
                 "VerifyPurchaseResultIOS" -> VerifyPurchaseResultIOS.fromJson(json)
                 else -> throw IllegalArgumentException("Unknown __typename for VerifyPurchaseResult: ${json["__typename"]}")
             }
diff --git a/packages/gql/src/generated/Types.swift b/packages/gql/src/generated/Types.swift
index e4681362..42365f34 100644
--- a/packages/gql/src/generated/Types.swift
+++ b/packages/gql/src/generated/Types.swift
@@ -844,6 +844,15 @@ public struct VerifyPurchaseResultAndroid: Codable {
     public var testTransaction: Bool
 }
 
+/// Result from Meta Horizon verify_entitlement API.
+/// Returns verification status and grant time for the entitlement.
+public struct VerifyPurchaseResultHorizon: Codable {
+    /// Unix timestamp (seconds) when the entitlement was granted.
+    public var grantTime: Double?
+    /// Whether the entitlement verification succeeded.
+    public var success: Bool
+}
+
 public struct VerifyPurchaseResultIOS: Codable {
     /// Whether the receipt is valid
     public var isValid: Bool
@@ -1142,6 +1151,12 @@ public struct RequestPurchaseProps: Codable {
     }
 }
 
+/// Platform-specific purchase request parameters.
+/// 
+/// Note: "Platforms" refers to the SDK/OS level (apple, google), not the store.
+/// - apple: Always targets App Store
+/// - google: Targets Play Store by default, or Horizon when built with horizon flavor
+///   (determined at build time, not runtime)
 public struct RequestPurchasePropsByPlatforms: Codable {
     /// @deprecated Use google instead
     public var android: RequestPurchaseAndroidProps?
@@ -1228,6 +1243,12 @@ public struct RequestSubscriptionIosProps: Codable {
     }
 }
 
+/// Platform-specific subscription request parameters.
+/// 
+/// Note: "Platforms" refers to the SDK/OS level (apple, google), not the store.
+/// - apple: Always targets App Store
+/// - google: Targets Play Store by default, or Horizon when built with horizon flavor
+///   (determined at build time, not runtime)
 public struct RequestSubscriptionPropsByPlatforms: Codable {
     /// @deprecated Use google instead
     public var android: RequestSubscriptionAndroidProps?
@@ -1273,12 +1294,16 @@ public struct RequestVerifyPurchaseWithIapkitGoogleProps: Codable {
     }
 }
 
+/// Platform-specific verification parameters for IAPKit.
+/// 
+/// - apple: Verifies via App Store (JWS token)
+/// - google: Verifies via Play Store (purchase token)
 public struct RequestVerifyPurchaseWithIapkitProps: Codable {
     /// API key used for the Authorization header (Bearer {apiKey}).
     public var apiKey: String?
-    /// Apple verification parameters.
+    /// Apple App Store verification parameters.
     public var apple: RequestVerifyPurchaseWithIapkitAppleProps?
-    /// Google verification parameters.
+    /// Google Play Store verification parameters.
     public var google: RequestVerifyPurchaseWithIapkitGoogleProps?
 
     public init(
@@ -1310,36 +1335,100 @@ public struct SubscriptionProductReplacementParamsAndroid: Codable {
     }
 }
 
-public struct VerifyPurchaseAndroidOptions: Codable {
+/// Apple App Store verification parameters.
+/// Used for server-side receipt validation via App Store Server API.
+/// 
+/// ⚠️ SECURITY: Contains sensitive token (jws). Do not log or persist this data.
+public struct VerifyPurchaseAppleOptions: Codable {
+    /// The JWS (JSON Web Signature) representation of the transaction.
+    /// ⚠️ Sensitive: Do not log this value.
+    public var jws: String
+
+    public init(
+        jws: String
+    ) {
+        self.jws = jws
+    }
+}
+
+/// Google Play Store verification parameters.
+/// Used for server-side receipt validation via Google Play Developer API.
+/// 
+/// ⚠️ SECURITY: Contains sensitive tokens (accessToken, purchaseToken). Do not log or persist this data.
+public struct VerifyPurchaseGoogleOptions: Codable {
+    /// Google OAuth2 access token for API authentication.
+    /// ⚠️ Sensitive: Do not log this value.
     public var accessToken: String
+    /// Whether this is a subscription purchase (affects API endpoint used)
     public var isSub: Bool?
+    /// Android package name (e.g., com.example.app)
     public var packageName: String
-    public var productToken: String
+    /// Purchase token from the purchase response.
+    /// ⚠️ Sensitive: Do not log this value.
+    public var purchaseToken: String
 
     public init(
         accessToken: String,
         isSub: Bool? = nil,
         packageName: String,
-        productToken: String
+        purchaseToken: String
     ) {
         self.accessToken = accessToken
         self.isSub = isSub
         self.packageName = packageName
-        self.productToken = productToken
+        self.purchaseToken = purchaseToken
     }
 }
 
+/// Meta Horizon (Quest) verification parameters.
+/// Used for server-side entitlement verification via Meta's S2S API.
+/// POST https://graph.oculus.com/$APP_ID/verify_entitlement
+/// 
+/// ⚠️ SECURITY: Contains sensitive token (accessToken). Do not log or persist this data.
+public struct VerifyPurchaseHorizonOptions: Codable {
+    /// Access token for Meta API authentication (OC|$APP_ID|$APP_SECRET or User Access Token).
+    /// ⚠️ Sensitive: Do not log this value.
+    public var accessToken: String
+    /// The SKU for the add-on item, defined in Meta Developer Dashboard
+    public var sku: String
+    /// The user ID of the user whose purchase you want to verify
+    public var userId: String
+
+    public init(
+        accessToken: String,
+        sku: String,
+        userId: String
+    ) {
+        self.accessToken = accessToken
+        self.sku = sku
+        self.userId = userId
+    }
+}
+
+/// Platform-specific purchase verification parameters.
+/// 
+/// - apple: Verifies via App Store Server API
+/// - google: Verifies via Google Play Developer API
+/// - horizon: Verifies via Meta's S2S API (verify_entitlement endpoint)
 public struct VerifyPurchaseProps: Codable {
-    /// Android-specific validation options
-    public var androidOptions: VerifyPurchaseAndroidOptions?
+    /// Apple App Store verification parameters.
+    public var apple: VerifyPurchaseAppleOptions?
+    /// Google Play Store verification parameters.
+    public var google: VerifyPurchaseGoogleOptions?
+    /// Meta Horizon (Quest) verification parameters.
+    public var horizon: VerifyPurchaseHorizonOptions?
     /// Product SKU to validate
     public var sku: String
 
     public init(
-        androidOptions: VerifyPurchaseAndroidOptions? = nil,
+        apple: VerifyPurchaseAppleOptions? = nil,
+        google: VerifyPurchaseGoogleOptions? = nil,
+        horizon: VerifyPurchaseHorizonOptions? = nil,
         sku: String
     ) {
-        self.androidOptions = androidOptions
+        self.apple = apple
+        self.google = google
+        self.horizon = horizon
         self.sku = sku
     }
 }
@@ -1667,6 +1756,7 @@ public enum Purchase: Codable, PurchaseCommon {
 public enum VerifyPurchaseResult: Codable {
     case verifyPurchaseResultAndroid(VerifyPurchaseResultAndroid)
     case verifyPurchaseResultIos(VerifyPurchaseResultIOS)
+    case verifyPurchaseResultHorizon(VerifyPurchaseResultHorizon)
 }
 
 // MARK: - Root Operations
diff --git a/packages/gql/src/generated/types.dart b/packages/gql/src/generated/types.dart
index b79e0451..ecde6bfe 100644
--- a/packages/gql/src/generated/types.dart
+++ b/packages/gql/src/generated/types.dart
@@ -2807,6 +2807,38 @@ class VerifyPurchaseResultAndroid extends VerifyPurchaseResult {
   }
 }
 
+/// Result from Meta Horizon verify_entitlement API.
+/// Returns verification status and grant time for the entitlement.
+class VerifyPurchaseResultHorizon extends VerifyPurchaseResult {
+  const VerifyPurchaseResultHorizon({
+    /// Unix timestamp (seconds) when the entitlement was granted.
+    this.grantTime,
+    /// Whether the entitlement verification succeeded.
+    required this.success,
+  });
+
+  /// Unix timestamp (seconds) when the entitlement was granted.
+  final double? grantTime;
+  /// Whether the entitlement verification succeeded.
+  final bool success;
+
+  factory VerifyPurchaseResultHorizon.fromJson(Map<String, dynamic> json) {
+    return VerifyPurchaseResultHorizon(
+      grantTime: (json['grantTime'] as num?)?.toDouble(),
+      success: json['success'] as bool,
+    );
+  }
+
+  @override
+  Map<String, dynamic> toJson() {
+    return {
+      '__typename': 'VerifyPurchaseResultHorizon',
+      'grantTime': grantTime,
+      'success': success,
+    };
+  }
+}
+
 class VerifyPurchaseResultIOS extends VerifyPurchaseResult {
   const VerifyPurchaseResultIOS({
     /// Whether the receipt is valid
@@ -3281,6 +3313,12 @@ class _SubsPurchase extends RequestPurchaseProps {
   }
 }
 
+/// Platform-specific purchase request parameters.
+/// 
+/// Note: "Platforms" refers to the SDK/OS level (apple, google), not the store.
+/// - apple: Always targets App Store
+/// - google: Targets Play Store by default, or Horizon when built with horizon flavor
+///   (determined at build time, not runtime)
 class RequestPurchasePropsByPlatforms {
   const RequestPurchasePropsByPlatforms({
     /// @deprecated Use google instead
@@ -3425,6 +3463,12 @@ class RequestSubscriptionIosProps {
   }
 }
 
+/// Platform-specific subscription request parameters.
+/// 
+/// Note: "Platforms" refers to the SDK/OS level (apple, google), not the store.
+/// - apple: Always targets App Store
+/// - google: Targets Play Store by default, or Horizon when built with horizon flavor
+///   (determined at build time, not runtime)
 class RequestSubscriptionPropsByPlatforms {
   const RequestSubscriptionPropsByPlatforms({
     /// @deprecated Use google instead
@@ -3509,21 +3553,25 @@ class RequestVerifyPurchaseWithIapkitGoogleProps {
   }
 }
 
+/// Platform-specific verification parameters for IAPKit.
+/// 
+/// - apple: Verifies via App Store (JWS token)
+/// - google: Verifies via Play Store (purchase token)
 class RequestVerifyPurchaseWithIapkitProps {
   const RequestVerifyPurchaseWithIapkitProps({
     /// API key used for the Authorization header (Bearer {apiKey}).
     this.apiKey,
-    /// Apple verification parameters.
+    /// Apple App Store verification parameters.
     this.apple,
-    /// Google verification parameters.
+    /// Google Play Store verification parameters.
     this.google,
   });
 
   /// API key used for the Authorization header (Bearer {apiKey}).
   final String? apiKey;
-  /// Apple verification parameters.
+  /// Apple App Store verification parameters.
   final RequestVerifyPurchaseWithIapkitAppleProps? apple;
-  /// Google verification parameters.
+  /// Google Play Store verification parameters.
   final RequestVerifyPurchaseWithIapkitGoogleProps? google;
 
   factory RequestVerifyPurchaseWithIapkitProps.fromJson(Map<String, dynamic> json) {
@@ -3574,25 +3622,69 @@ class SubscriptionProductReplacementParamsAndroid {
   }
 }
 
-class VerifyPurchaseAndroidOptions {
-  const VerifyPurchaseAndroidOptions({
+/// Apple App Store verification parameters.
+/// Used for server-side receipt validation via App Store Server API.
+/// 
+/// ⚠️ SECURITY: Contains sensitive token (jws). Do not log or persist this data.
+class VerifyPurchaseAppleOptions {
+  const VerifyPurchaseAppleOptions({
+    /// The JWS (JSON Web Signature) representation of the transaction.
+    /// ⚠️ Sensitive: Do not log this value.
+    required this.jws,
+  });
+
+  /// The JWS (JSON Web Signature) representation of the transaction.
+  /// ⚠️ Sensitive: Do not log this value.
+  final String jws;
+
+  factory VerifyPurchaseAppleOptions.fromJson(Map<String, dynamic> json) {
+    return VerifyPurchaseAppleOptions(
+      jws: json['jws'] as String,
+    );
+  }
+
+  Map<String, dynamic> toJson() {
+    return {
+      'jws': jws,
+    };
+  }
+}
+
+/// Google Play Store verification parameters.
+/// Used for server-side receipt validation via Google Play Developer API.
+/// 
+/// ⚠️ SECURITY: Contains sensitive tokens (accessToken, purchaseToken). Do not log or persist this data.
+class VerifyPurchaseGoogleOptions {
+  const VerifyPurchaseGoogleOptions({
+    /// Google OAuth2 access token for API authentication.
+    /// ⚠️ Sensitive: Do not log this value.
     required this.accessToken,
+    /// Whether this is a subscription purchase (affects API endpoint used)
     this.isSub,
+    /// Android package name (e.g., com.example.app)
     required this.packageName,
-    required this.productToken,
+    /// Purchase token from the purchase response.
+    /// ⚠️ Sensitive: Do not log this value.
+    required this.purchaseToken,
   });
 
+  /// Google OAuth2 access token for API authentication.
+  /// ⚠️ Sensitive: Do not log this value.
   final String accessToken;
+  /// Whether this is a subscription purchase (affects API endpoint used)
   final bool? isSub;
+  /// Android package name (e.g., com.example.app)
   final String packageName;
-  final String productToken;
+  /// Purchase token from the purchase response.
+  /// ⚠️ Sensitive: Do not log this value.
+  final String purchaseToken;
 
-  factory VerifyPurchaseAndroidOptions.fromJson(Map<String, dynamic> json) {
-    return VerifyPurchaseAndroidOptions(
+  factory VerifyPurchaseGoogleOptions.fromJson(Map<String, dynamic> json) {
+    return VerifyPurchaseGoogleOptions(
       accessToken: json['accessToken'] as String,
       isSub: json['isSub'] as bool?,
       packageName: json['packageName'] as String,
-      productToken: json['productToken'] as String,
+      purchaseToken: json['purchaseToken'] as String,
     );
   }
 
@@ -3601,34 +3693,92 @@ class VerifyPurchaseAndroidOptions {
       'accessToken': accessToken,
       'isSub': isSub,
       'packageName': packageName,
-      'productToken': productToken,
+      'purchaseToken': purchaseToken,
+    };
+  }
+}
+
+/// Meta Horizon (Quest) verification parameters.
+/// Used for server-side entitlement verification via Meta's S2S API.
+/// POST https://graph.oculus.com/$APP_ID/verify_entitlement
+/// 
+/// ⚠️ SECURITY: Contains sensitive token (accessToken). Do not log or persist this data.
+class VerifyPurchaseHorizonOptions {
+  const VerifyPurchaseHorizonOptions({
+    /// Access token for Meta API authentication (OC|$APP_ID|$APP_SECRET or User Access Token).
+    /// ⚠️ Sensitive: Do not log this value.
+    required this.accessToken,
+    /// The SKU for the add-on item, defined in Meta Developer Dashboard
+    required this.sku,
+    /// The user ID of the user whose purchase you want to verify
+    required this.userId,
+  });
+
+  /// Access token for Meta API authentication (OC|$APP_ID|$APP_SECRET or User Access Token).
+  /// ⚠️ Sensitive: Do not log this value.
+  final String accessToken;
+  /// The SKU for the add-on item, defined in Meta Developer Dashboard
+  final String sku;
+  /// The user ID of the user whose purchase you want to verify
+  final String userId;
+
+  factory VerifyPurchaseHorizonOptions.fromJson(Map<String, dynamic> json) {
+    return VerifyPurchaseHorizonOptions(
+      accessToken: json['accessToken'] as String,
+      sku: json['sku'] as String,
+      userId: json['userId'] as String,
+    );
+  }
+
+  Map<String, dynamic> toJson() {
+    return {
+      'accessToken': accessToken,
+      'sku': sku,
+      'userId': userId,
     };
   }
 }
 
+/// Platform-specific purchase verification parameters.
+/// 
+/// - apple: Verifies via App Store Server API
+/// - google: Verifies via Google Play Developer API
+/// - horizon: Verifies via Meta's S2S API (verify_entitlement endpoint)
 class VerifyPurchaseProps {
   const VerifyPurchaseProps({
-    /// Android-specific validation options
-    this.androidOptions,
+    /// Apple App Store verification parameters.
+    this.apple,
+    /// Google Play Store verification parameters.
+    this.google,
+    /// Meta Horizon (Quest) verification parameters.
+    this.horizon,
     /// Product SKU to validate
     required this.sku,
   });
 
-  /// Android-specific validation options
-  final VerifyPurchaseAndroidOptions? androidOptions;
+  /// Apple App Store verification parameters.
+  final VerifyPurchaseAppleOptions? apple;
+  /// Google Play Store verification parameters.
+  final VerifyPurchaseGoogleOptions? google;
+  /// Meta Horizon (Quest) verification parameters.
+  final VerifyPurchaseHorizonOptions? horizon;
   /// Product SKU to validate
   final String sku;
 
   factory VerifyPurchaseProps.fromJson(Map<String, dynamic> json) {
     return VerifyPurchaseProps(
-      androidOptions: json['androidOptions'] != null ? VerifyPurchaseAndroidOptions.fromJson(json['androidOptions'] as Map<String, dynamic>) : null,
+      apple: json['apple'] != null ? VerifyPurchaseAppleOptions.fromJson(json['apple'] as Map<String, dynamic>) : null,
+      google: json['google'] != null ? VerifyPurchaseGoogleOptions.fromJson(json['google'] as Map<String, dynamic>) : null,
+      horizon: json['horizon'] != null ? VerifyPurchaseHorizonOptions.fromJson(json['horizon'] as Map<String, dynamic>) : null,
       sku: json['sku'] as String,
     );
   }
 
   Map<String, dynamic> toJson() {
     return {
-      'androidOptions': androidOptions?.toJson(),
+      'apple': apple?.toJson(),
+      'google': google?.toJson(),
+      'horizon': horizon?.toJson(),
       'sku': sku,
     };
   }
@@ -3827,6 +3977,8 @@ sealed class VerifyPurchaseResult {
     switch (typeName) {
       case 'VerifyPurchaseResultAndroid':
         return VerifyPurchaseResultAndroid.fromJson(json);
+      case 'VerifyPurchaseResultHorizon':
+        return VerifyPurchaseResultHorizon.fromJson(json);
       case 'VerifyPurchaseResultIOS':
         return VerifyPurchaseResultIOS.fromJson(json);
     }
@@ -3903,12 +4055,16 @@ abstract class MutationResolver {
   Future<bool> syncIOS();
   /// Validate purchase receipts with the configured providers
   Future<VerifyPurchaseResult> validateReceipt({
-    VerifyPurchaseAndroidOptions? androidOptions,
+    VerifyPurchaseAppleOptions? apple,
+    VerifyPurchaseGoogleOptions? google,
+    VerifyPurchaseHorizonOptions? horizon,
     required String sku,
   });
   /// Verify purchases with the configured providers
   Future<VerifyPurchaseResult> verifyPurchase({
-    VerifyPurchaseAndroidOptions? androidOptions,
+    VerifyPurchaseAppleOptions? apple,
+    VerifyPurchaseGoogleOptions? google,
+    VerifyPurchaseHorizonOptions? horizon,
     required String sku,
   });
   /// Verify purchases with a specific provider (e.g., IAPKit)
@@ -3962,7 +4118,9 @@ abstract class QueryResolver {
   Future<List<SubscriptionStatusIOS>> subscriptionStatusIOS(String sku);
   /// Validate a receipt for a specific product
   Future<VerifyPurchaseResultIOS> validateReceiptIOS({
-    VerifyPurchaseAndroidOptions? androidOptions,
+    VerifyPurchaseAppleOptions? apple,
+    VerifyPurchaseGoogleOptions? google,
+    VerifyPurchaseHorizonOptions? horizon,
     required String sku,
   });
 }
@@ -4012,11 +4170,15 @@ typedef MutationShowAlternativeBillingDialogAndroidHandler = Future<bool> Functi
 typedef MutationShowManageSubscriptionsIOSHandler = Future<List<PurchaseIOS>> Function();
 typedef MutationSyncIOSHandler = Future<bool> Function();
 typedef MutationValidateReceiptHandler = Future<VerifyPurchaseResult> Function({
-  VerifyPurchaseAndroidOptions? androidOptions,
+  VerifyPurchaseAppleOptions? apple,
+  VerifyPurchaseGoogleOptions? google,
+  VerifyPurchaseHorizonOptions? horizon,
   required String sku,
 });
 typedef MutationVerifyPurchaseHandler = Future<VerifyPurchaseResult> Function({
-  VerifyPurchaseAndroidOptions? androidOptions,
+  VerifyPurchaseAppleOptions? apple,
+  VerifyPurchaseGoogleOptions? google,
+  VerifyPurchaseHorizonOptions? horizon,
   required String sku,
 });
 typedef MutationVerifyPurchaseWithProviderHandler = Future<VerifyPurchaseWithProviderResult> Function({
@@ -4100,7 +4262,9 @@ typedef QueryIsTransactionVerifiedIOSHandler = Future<bool> Function(String sku)
 typedef QueryLatestTransactionIOSHandler = Future<PurchaseIOS?> Function(String sku);
 typedef QuerySubscriptionStatusIOSHandler = Future<List<SubscriptionStatusIOS>> Function(String sku);
 typedef QueryValidateReceiptIOSHandler = Future<VerifyPurchaseResultIOS> Function({
-  VerifyPurchaseAndroidOptions? androidOptions,
+  VerifyPurchaseAppleOptions? apple,
+  VerifyPurchaseGoogleOptions? google,
+  VerifyPurchaseHorizonOptions? horizon,
   required String sku,
 });
 
diff --git a/packages/gql/src/generated/types.ts b/packages/gql/src/generated/types.ts
index bdd4ac65..2f7ebf1a 100644
--- a/packages/gql/src/generated/types.ts
+++ b/packages/gql/src/generated/types.ts
@@ -917,6 +917,14 @@ export type RequestPurchaseProps =
       useAlternativeBilling?: boolean | null;
     };
 
+/**
+ * Platform-specific purchase request parameters.
+ *
+ * Note: "Platforms" refers to the SDK/OS level (apple, google), not the store.
+ * - apple: Always targets App Store
+ * - google: Targets Play Store by default, or Horizon when built with horizon flavor
+ *   (determined at build time, not runtime)
+ */
 export interface RequestPurchasePropsByPlatforms {
   /** @deprecated Use google instead */
   android?: (RequestPurchaseAndroidProps | null);
@@ -963,6 +971,14 @@ export interface RequestSubscriptionIosProps {
   withOffer?: (DiscountOfferInputIOS | null);
 }
 
+/**
+ * Platform-specific subscription request parameters.
+ *
+ * Note: "Platforms" refers to the SDK/OS level (apple, google), not the store.
+ * - apple: Always targets App Store
+ * - google: Targets Play Store by default, or Horizon when built with horizon flavor
+ *   (determined at build time, not runtime)
+ */
 export interface RequestSubscriptionPropsByPlatforms {
   /** @deprecated Use google instead */
   android?: (RequestSubscriptionAndroidProps | null);
@@ -984,12 +1000,18 @@ export interface RequestVerifyPurchaseWithIapkitGoogleProps {
   purchaseToken: string;
 }
 
+/**
+ * Platform-specific verification parameters for IAPKit.
+ *
+ * - apple: Verifies via App Store (JWS token)
+ * - google: Verifies via Play Store (purchase token)
+ */
 export interface RequestVerifyPurchaseWithIapkitProps {
   /** API key used for the Authorization header (Bearer {apiKey}). */
   apiKey?: (string | null);
-  /** Apple verification parameters. */
+  /** Apple App Store verification parameters. */
   apple?: (RequestVerifyPurchaseWithIapkitAppleProps | null);
-  /** Google verification parameters. */
+  /** Google Play Store verification parameters. */
   google?: (RequestVerifyPurchaseWithIapkitGoogleProps | null);
 }
 
@@ -1088,21 +1110,81 @@ export interface ValidTimeWindowAndroid {
   startTimeMillis: string;
 }
 
-export interface VerifyPurchaseAndroidOptions {
+/**
+ * Apple App Store verification parameters.
+ * Used for server-side receipt validation via App Store Server API.
+ *
+ * ⚠️ SECURITY: Contains sensitive token (jws). Do not log or persist this data.
+ */
+export interface VerifyPurchaseAppleOptions {
+  /**
+   * The JWS (JSON Web Signature) representation of the transaction.
+   * ⚠️ Sensitive: Do not log this value.
+   */
+  jws: string;
+}
+
+/**
+ * Google Play Store verification parameters.
+ * Used for server-side receipt validation via Google Play Developer API.
+ *
+ * ⚠️ SECURITY: Contains sensitive tokens (accessToken, purchaseToken). Do not log or persist this data.
+ */
+export interface VerifyPurchaseGoogleOptions {
+  /**
+   * Google OAuth2 access token for API authentication.
+   * ⚠️ Sensitive: Do not log this value.
+   */
   accessToken: string;
+  /** Whether this is a subscription purchase (affects API endpoint used) */
   isSub?: (boolean | null);
+  /** Android package name (e.g., com.example.app) */
   packageName: string;
-  productToken: string;
+  /**
+   * Purchase token from the purchase response.
+   * ⚠️ Sensitive: Do not log this value.
+   */
+  purchaseToken: string;
 }
 
+/**
+ * Meta Horizon (Quest) verification parameters.
+ * Used for server-side entitlement verification via Meta's S2S API.
+ * POST https://graph.oculus.com/$APP_ID/verify_entitlement
+ *
+ * ⚠️ SECURITY: Contains sensitive token (accessToken). Do not log or persist this data.
+ */
+export interface VerifyPurchaseHorizonOptions {
+  /**
+   * Access token for Meta API authentication (OC|$APP_ID|$APP_SECRET or User Access Token).
+   * ⚠️ Sensitive: Do not log this value.
+   */
+  accessToken: string;
+  /** The SKU for the add-on item, defined in Meta Developer Dashboard */
+  sku: string;
+  /** The user ID of the user whose purchase you want to verify */
+  userId: string;
+}
+
+/**
+ * Platform-specific purchase verification parameters.
+ *
+ * - apple: Verifies via App Store Server API
+ * - google: Verifies via Google Play Developer API
+ * - horizon: Verifies via Meta's S2S API (verify_entitlement endpoint)
+ */
 export interface VerifyPurchaseProps {
-  /** Android-specific validation options */
-  androidOptions?: (VerifyPurchaseAndroidOptions | null);
+  /** Apple App Store verification parameters. */
+  apple?: (VerifyPurchaseAppleOptions | null);
+  /** Google Play Store verification parameters. */
+  google?: (VerifyPurchaseGoogleOptions | null);
+  /** Meta Horizon (Quest) verification parameters. */
+  horizon?: (VerifyPurchaseHorizonOptions | null);
   /** Product SKU to validate */
   sku: string;
 }
 
-export type VerifyPurchaseResult = VerifyPurchaseResultAndroid | VerifyPurchaseResultIOS;
+export type VerifyPurchaseResult = VerifyPurchaseResultAndroid | VerifyPurchaseResultHorizon | VerifyPurchaseResultIOS;
 
 export interface VerifyPurchaseResultAndroid {
   autoRenewing: boolean;
@@ -1125,6 +1207,17 @@ export interface VerifyPurchaseResultAndroid {
   testTransaction: boolean;
 }
 
+/**
+ * Result from Meta Horizon verify_entitlement API.
+ * Returns verification status and grant time for the entitlement.
+ */
+export interface VerifyPurchaseResultHorizon {
+  /** Unix timestamp (seconds) when the entitlement was granted. */
+  grantTime?: (number | null);
+  /** Whether the entitlement verification succeeded. */
+  success: boolean;
+}
+
 export interface VerifyPurchaseResultIOS {
   /** Whether the receipt is valid */
   isValid: boolean;
diff --git a/packages/gql/src/type-android.graphql b/packages/gql/src/type-android.graphql
index 7503c0a3..57a9175b 100644
--- a/packages/gql/src/type-android.graphql
+++ b/packages/gql/src/type-android.graphql
@@ -370,13 +370,71 @@ input AndroidSubscriptionOfferInput {
   offerToken: String!
 }
 
-input VerifyPurchaseAndroidOptions {
+"""
+Google Play Store verification parameters.
+Used for server-side receipt validation via Google Play Developer API.
+
+⚠️ SECURITY: Contains sensitive tokens (accessToken, purchaseToken). Do not log or persist this data.
+"""
+input VerifyPurchaseGoogleOptions {
+  """
+  Android package name (e.g., com.example.app)
+  """
   packageName: String!
-  productToken: String!
+  """
+  Purchase token from the purchase response.
+  ⚠️ Sensitive: Do not log this value.
+  """
+  purchaseToken: String!
+  """
+  Google OAuth2 access token for API authentication.
+  ⚠️ Sensitive: Do not log this value.
+  """
   accessToken: String!
+  """
+  Whether this is a subscription purchase (affects API endpoint used)
+  """
   isSub: Boolean
 }
 
+"""
+Meta Horizon (Quest) verification parameters.
+Used for server-side entitlement verification via Meta's S2S API.
+POST https://graph.oculus.com/$APP_ID/verify_entitlement
+
+⚠️ SECURITY: Contains sensitive token (accessToken). Do not log or persist this data.
+"""
+input VerifyPurchaseHorizonOptions {
+  """
+  The SKU for the add-on item, defined in Meta Developer Dashboard
+  """
+  sku: String!
+  """
+  The user ID of the user whose purchase you want to verify
+  """
+  userId: String!
+  """
+  Access token for Meta API authentication (OC|$APP_ID|$APP_SECRET or User Access Token).
+  ⚠️ Sensitive: Do not log this value.
+  """
+  accessToken: String!
+}
+
+"""
+Result from Meta Horizon verify_entitlement API.
+Returns verification status and grant time for the entitlement.
+"""
+type VerifyPurchaseResultHorizon {
+  """
+  Whether the entitlement verification succeeded.
+  """
+  success: Boolean!
+  """
+  Unix timestamp (seconds) when the entitlement was granted.
+  """
+  grantTime: Float
+}
+
 type VerifyPurchaseResultAndroid {
   autoRenewing: Boolean!
   betaProduct: Boolean!
diff --git a/packages/gql/src/type-ios.graphql b/packages/gql/src/type-ios.graphql
index daed31ce..d4b036a1 100644
--- a/packages/gql/src/type-ios.graphql
+++ b/packages/gql/src/type-ios.graphql
@@ -227,6 +227,20 @@ input DiscountOfferInputIOS {
   timestamp: Float!
 }
 
+"""
+Apple App Store verification parameters.
+Used for server-side receipt validation via App Store Server API.
+
+⚠️ SECURITY: Contains sensitive token (jws). Do not log or persist this data.
+"""
+input VerifyPurchaseAppleOptions {
+  """
+  The JWS (JSON Web Signature) representation of the transaction.
+  ⚠️ Sensitive: Do not log this value.
+  """
+  jws: String!
+}
+
 type VerifyPurchaseResultIOS {
   """
   Whether the receipt is valid
diff --git a/packages/gql/src/type.graphql b/packages/gql/src/type.graphql
index 65ce1f20..08e57323 100644
--- a/packages/gql/src/type.graphql
+++ b/packages/gql/src/type.graphql
@@ -187,7 +187,14 @@ input DeepLinkOptions {
   packageNameAndroid: String
 }
 
-# Request props (platform-specific containers)
+"""
+Platform-specific purchase request parameters.
+
+Note: "Platforms" refers to the SDK/OS level (apple, google), not the store.
+- apple: Always targets App Store
+- google: Targets Play Store by default, or Horizon when built with horizon flavor
+  (determined at build time, not runtime)
+"""
 input RequestPurchasePropsByPlatforms {
   """
   Apple-specific purchase parameters
@@ -207,6 +214,14 @@ input RequestPurchasePropsByPlatforms {
   android: RequestPurchaseAndroidProps
 }
 
+"""
+Platform-specific subscription request parameters.
+
+Note: "Platforms" refers to the SDK/OS level (apple, google), not the store.
+- apple: Always targets App Store
+- google: Targets Play Store by default, or Horizon when built with horizon flavor
+  (determined at build time, not runtime)
+"""
 input RequestSubscriptionPropsByPlatforms {
   """
   Apple-specific subscription parameters
@@ -227,20 +242,36 @@ input RequestSubscriptionPropsByPlatforms {
 }
 
 # Receipt validation inputs and results
+"""
+Platform-specific purchase verification parameters.
+
+- apple: Verifies via App Store Server API
+- google: Verifies via Google Play Developer API
+- horizon: Verifies via Meta's S2S API (verify_entitlement endpoint)
+"""
 input VerifyPurchaseProps {
   """
   Product SKU to validate
   """
   sku: String!
   """
-  Android-specific validation options
+  Apple App Store verification parameters.
+  """
+  apple: VerifyPurchaseAppleOptions
+  """
+  Google Play Store verification parameters.
+  """
+  google: VerifyPurchaseGoogleOptions
   """
-  androidOptions: VerifyPurchaseAndroidOptions
+  Meta Horizon (Quest) verification parameters.
+  """
+  horizon: VerifyPurchaseHorizonOptions
 }
 
 union VerifyPurchaseResult =
     VerifyPurchaseResultAndroid
   | VerifyPurchaseResultIOS
+  | VerifyPurchaseResultHorizon
 
 input RequestVerifyPurchaseWithIapkitAppleProps {
   """
@@ -256,17 +287,23 @@ input RequestVerifyPurchaseWithIapkitGoogleProps {
   purchaseToken: String!
 }
 
+"""
+Platform-specific verification parameters for IAPKit.
+
+- apple: Verifies via App Store (JWS token)
+- google: Verifies via Play Store (purchase token)
+"""
 input RequestVerifyPurchaseWithIapkitProps {
   """
   API key used for the Authorization header (Bearer {apiKey}).
   """
   apiKey: String
   """
-  Apple verification parameters.
+  Apple App Store verification parameters.
   """
   apple: RequestVerifyPurchaseWithIapkitAppleProps
   """
-  Google verification parameters.
+  Google Play Store verification parameters.
   """
   google: RequestVerifyPurchaseWithIapkitGoogleProps
 }