diff --git a/.changeset/wallet-support-matrix.md b/.changeset/wallet-support-matrix.md
new file mode 100644
index 0000000..c599900
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+++ b/.changeset/wallet-support-matrix.md
@@ -0,0 +1,5 @@
+---
+"@satoshai/kit": patch
+---
+
+Add wallet support matrix to README documenting which RPC methods each wallet supports
diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -317,6 +317,29 @@ All 6 wallets work with both headless (`connect('xverse')`) and modal (`connect(
 | WalletConnect | `wallet-connect` |
 | OKX | `okx` |
 
+### Wallet Support Matrix
+
+| Hook | Xverse | Leather | Asigna | Fordefi | WalletConnect | OKX |
+|------|--------|---------|--------|---------|---------------|-----|
+| `useConnect` | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
+| `useSignMessage` | ✓ | ✓ | ? | ? | ~ | ✓ |
+| `useSignStructuredMessage` | ✓ | ✓ | ? | ? | ~ | ✗ |
+| `useSignTransaction` | ✓ | ✓ | ? | ? | ~ | ✗ |
+| `useWriteContract` | ✓ | ✓ | ✓ | ✓ | ~ | ✓ |
+| `useTransferSTX` | ✓ | ✓ | ✓ | ✓ | ~ | ✓ |
+
+✓ Confirmed supported | ✗ Unsupported (throws error) | ? Unverified | ~ Depends on the connected wallet
+
+**Notes:**
+
+- **OKX** uses a proprietary API (`window.okxwallet.stacks`) instead of the standard `@stacks/connect` RPC. `useSignStructuredMessage` and `useSignTransaction` are explicitly unsupported and will throw.
+- **Asigna** is a multisig wallet. Transaction-based hooks (`useWriteContract`, `useTransferSTX`) work, but message signing hooks may be limited since there is no multisig message signature standard on Stacks.
+- **Fordefi** supports transactions and contract calls on Stacks, but their [supported blockchains](https://docs.fordefi.com/docs/supported-blockchains) page does not list Stacks under message signing capabilities.
+- **WalletConnect** is a relay protocol — all methods are forwarded, but actual support depends on the wallet on the other end.
+- **Xverse** and **Leather** implement the full [SIP-030](https://github.com/janniks/sips/blob/main/sips/sip-030/sip-030-wallet-interface.md) interface.
+
+This matrix was compiled from wallet documentation as of March 2026. Sources: [Xverse Sats Connect docs](https://docs.xverse.app/sats-connect/stacks-methods), [Leather developer docs](https://leather.gitbook.io/developers), [Asigna docs](https://asigna.gitbook.io/asigna), [Fordefi docs](https://docs.fordefi.com/docs/supported-blockchains), [@stacks/connect WalletConnect source](https://github.com/stx-labs/connect/tree/main/packages/connect/src/walletconnect).
+
 ## Peer Dependencies
 
 - `react` ^18 or ^19