diff --git a/.changeset/slimy-paws-rescue.md b/.changeset/slimy-paws-rescue.md
new file mode 100644
index 0000000..66edaa2
--- /dev/null
+++ b/.changeset/slimy-paws-rescue.md
@@ -0,0 +1,5 @@
+---
+'@abstract-foundation/agw-client': patch
+---
+
+Add new valid chain id
diff --git a/packages/agw-client/src/actions/signTransaction.ts b/packages/agw-client/src/actions/signTransaction.ts
index 74d6338..ab7d25e 100644
--- a/packages/agw-client/src/actions/signTransaction.ts
+++ b/packages/agw-client/src/actions/signTransaction.ts
@@ -23,7 +23,7 @@ import {
   type AssertEip712RequestParameters,
 } from '../eip712.js';
 import { AccountNotFoundError } from '../errors/account.js';
-import { validChains } from '../exports/index.js';
+import { VALID_CHAINS } from '../utils.js';
 import { transformHexValues } from '../utils.js';
 
 export async function signTransaction<
@@ -69,7 +69,7 @@ export async function signTransaction<
     ...(transaction as AssertEip712RequestParameters),
   });
 
-  if (!chain || validChains[chain.id] === undefined) {
+  if (!chain || VALID_CHAINS[chain.id] === undefined) {
     throw new BaseError('Invalid chain specified');
   }
 
diff --git a/packages/agw-client/src/utils.ts b/packages/agw-client/src/utils.ts
index 1e97ecd..29a1a46 100644
--- a/packages/agw-client/src/utils.ts
+++ b/packages/agw-client/src/utils.ts
@@ -24,6 +24,7 @@ import { type Call } from './types/call.js';
 // TODO: support Abstract mainnet
 export const VALID_CHAINS: Record<number, Chain> = {
   [abstractTestnet.id]: abstractTestnet,
+  [2741]: { id: 2741 } as Chain,
 };
 
 export function convertBigIntToString(value: any): any {
diff --git a/packages/agw-react/src/abstractWalletConnector.ts b/packages/agw-react/src/abstractWalletConnector.ts
index b289c6f..c45ef4d 100644
--- a/packages/agw-react/src/abstractWalletConnector.ts
+++ b/packages/agw-react/src/abstractWalletConnector.ts
@@ -12,7 +12,6 @@ import {
   http,
   type Transport,
 } from 'viem';
-import { abstractTestnet } from 'viem/chains';
 
 import { AGW_APP_ID, ICON_URL } from './constants.js';
 
@@ -64,14 +63,16 @@ function abstractWalletConnector(
 
   return (params) => {
     const chains = [...params.chains];
-    const chainIndex = chains.findIndex(
-      (chain) => chain.id === abstractTestnet.id,
-    ); // TODO: add mainnet
-    const hasChain = chainIndex !== -1;
     let defaultChain = params.chains[0];
-    if (hasChain) {
-      const removedChains = chains.splice(chainIndex, 1);
-      defaultChain = removedChains[0] ?? defaultChain;
+    const validChainIds = Object.keys(validChains).map(Number).sort();
+    for (const chainId of validChainIds) {
+      const chainIndex = chains.findIndex((chain) => chain.id === chainId);
+      const hasChain = chainIndex !== -1;
+      if (hasChain) {
+        const removedChains = chains.splice(chainIndex, 1);
+        defaultChain = removedChains[0] ?? defaultChain;
+        break;
+      }
     }
 
     const connector = toPrivyWalletConnector({