diff --git a/bun.lock b/bun.lock
index e01d116..c3208d9 100644
--- a/bun.lock
+++ b/bun.lock
@@ -4,7 +4,7 @@
     "": {
       "name": "tx-builder",
       "dependencies": {
-        "@mayanfinance/swap-sdk": "^13.2.0",
+        "@mayanfinance/swap-sdk": "^13.3.0",
         "@mysten/sui": "^1.17.0",
         "@solana/spl-token": "^0.4.14",
         "@solana/web3.js": "^1.98.0",
@@ -94,7 +94,7 @@
 
     "@jridgewell/sourcemap-codec": ["@jridgewell/sourcemap-codec@1.5.5", "", {}, "sha512-cYQ9310grqxueWbl+WuIUIaiUaDcj7WOq5fVhEljNVgRfOUhY9fy2zTvfoqWsnebh8Sl70VScFbICvJnLKB0Og=="],
 
-    "@mayanfinance/swap-sdk": ["@mayanfinance/swap-sdk@13.2.0", "", { "dependencies": { "@mysten/sui": "^1.34.0", "@noble/hashes": "1.8.0", "@solana/buffer-layout": "^4 || ^3", "@solana/web3.js": "^1.87.6", "bs58": "^6.0.0", "cross-fetch": "^3.1.5", "ethers": "^6", "js-sha3": "^0.8.0" } }, "sha512-4ugOSZOHjwXZhkyIsDVd9y764BvwHl72+yDTrkNXWlyHnkZTbJUd1U/KyFeA0LpUcAD9ocdsvAP8jFJcLWXSPw=="],
+    "@mayanfinance/swap-sdk": ["@mayanfinance/swap-sdk@13.3.0", "", { "dependencies": { "@mysten/sui": "^1.34.0", "@noble/hashes": "1.8.0", "@solana/buffer-layout": "^4 || ^3", "@solana/web3.js": "^1.87.6", "bs58": "^6.0.0", "cross-fetch": "^3.1.5", "ethers": "^6", "js-sha3": "^0.8.0" } }, "sha512-wBsyJB4tTsVEdBeebBykK9KUiLziQ4hLnXomqB8/JT8MjWTCpN50gimAXK/TrepcHkZznQlMarqNNmbGCL9TZw=="],
 
     "@mysten/bcs": ["@mysten/bcs@1.9.2", "", { "dependencies": { "@mysten/utils": "0.2.0", "@scure/base": "^1.2.6" } }, "sha512-kBk5xrxV9OWR7i+JhL/plQrgQ2/KJhB2pB5gj+w6GXhbMQwS3DPpOvi/zN0Tj84jwPvHMllpEl0QHj6ywN7/eQ=="],
 
diff --git a/package.json b/package.json
index c508ade..8ce1ea8 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "typescript": "^5.0.0"
   },
   "dependencies": {
-    "@mayanfinance/swap-sdk": "^13.2.0",
+    "@mayanfinance/swap-sdk": "^13.3.0",
     "@mysten/sui": "^1.17.0",
     "@solana/spl-token": "^0.4.14",
     "@solana/web3.js": "^1.98.0",
diff --git a/src/server.ts b/src/server.ts
index 77cdd64..a6baff2 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -131,6 +131,7 @@ export function createServer(config: ServerConfig) {
         fullList: query.fullList !== undefined ? query.fullList === 'true' : undefined,
         payload: query.payload as string | undefined,
         monoChain: query.monoChain !== undefined ? query.monoChain === 'true' : undefined,
+        memoHex: query.payload as string | undefined,
       };
 
       // Validate required fields
@@ -166,7 +167,7 @@ export function createServer(config: ServerConfig) {
 
       // Build QuoteOptions from flat request
       const quoteOptions: QuoteOptions = {
-        apiKey: process.env.SWAP_SDK_API_KEY,
+        apiKey: req.headers['x-api-key'] as string | undefined,
       };
       if (body.wormhole !== undefined) quoteOptions.wormhole = body.wormhole;
       if (body.swift !== undefined) quoteOptions.swift = body.swift;
@@ -178,6 +179,7 @@ export function createServer(config: ServerConfig) {
       if (body.fullList !== undefined) quoteOptions.fullList = body.fullList;
       if (body.payload) quoteOptions.payload = body.payload;
       if (body.monoChain !== undefined) quoteOptions.monoChain = body.monoChain;
+      if (body.memoHex) quoteOptions.memoHex = body.memoHex;
 
       // Fetch quotes
       const quotes = await fetchQuote(quoteParams, quoteOptions);
diff --git a/src/types.ts b/src/types.ts
index 1276d6d..f5fd2a6 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -263,6 +263,7 @@ export interface FetchQuoteRequest {
   fullList?: boolean;
   payload?: string;
   monoChain?: boolean;
+  memoHex?: string;
 }
 
 export interface FetchQuoteResponse {