diff --git a/src/main.tsx b/src/main.tsx
index 83e2b7f..29457a3 100644
--- a/src/main.tsx
+++ b/src/main.tsx
@@ -5,16 +5,25 @@ import { getDefaultConfig } from '@rainbow-me/rainbowkit';
 import ReactDOM from 'react-dom/client';
 import { BrowserRouter } from 'react-router-dom';
 import { baseSepolia, optimismSepolia } from 'viem/chains';
-import { WagmiProvider } from 'wagmi';
+import { http, WagmiProvider } from 'wagmi';
 
 import App from './App';
 
+if (!import.meta.env.VITE_PROJECT_ID) {
+  throw new Error('VITE_PROJECT_ID environment variable is required');
+}
 const projectID = import.meta.env.VITE_PROJECT_ID;
 
+export const SUPPORTED_CHAINS = [baseSepolia, optimismSepolia];
+
 const config = getDefaultConfig({
   appName: 'Identity on chain platform',
   projectId: projectID,
   chains: [optimismSepolia, baseSepolia],
+  transports: SUPPORTED_CHAINS.reduce(
+    (obj, chain) => ({ ...obj, [chain.id]: http() }),
+    {}
+  ),
   ssr: false,
 });
 
diff --git a/src/services/eas/index.ts b/src/services/eas/index.ts
index fa678bf..4886341 100644
--- a/src/services/eas/index.ts
+++ b/src/services/eas/index.ts
@@ -1,5 +1,3 @@
-import { GraphQLClient } from 'graphql-request';
-
 export const easBaseUrl = import.meta.env.VITE_API_GRAPHQL_URL;
 
 export const chainIdToGraphQLEndpoint: { [key: number]: string } = {
@@ -19,9 +17,3 @@ export const chainIdToGraphQLEndpoint: { [key: number]: string } = {
 };
 
 export const ATTESTER_ADDRESS = import.meta.env.VITE_EAS_ATTESTER_ADDRESS;
-
-if (!easBaseUrl) {
-  throw new Error('VITE_API_GRAPHQL_URL is not defined');
-}
-
-export const graphQLClient = new GraphQLClient(easBaseUrl);