diff --git a/packages/node/src/indexer/api.service.ts b/packages/node/src/indexer/api.service.ts
index ab772344c0..ff570d26fc 100644
--- a/packages/node/src/indexer/api.service.ts
+++ b/packages/node/src/indexer/api.service.ts
@@ -17,10 +17,16 @@ import { SubqueryProject } from '../configure/SubqueryProject';
 import { ApiAt } from './types';
 import { HttpProvider } from './x-provider/http';
 
+// eslint-disable-next-line @typescript-eslint/no-var-requires
+const { version: packageVersion } = require('../../package.json');
+
 const NOT_SUPPORT = (name: string) => () => {
   throw new Error(`${name}() is not supported`);
 };
 
+// https://github.com/polkadot-js/api/blob/12750bc83d8d7f01957896a80a7ba948ba3690b7/packages/rpc-provider/src/ws/index.ts#L43
+const RETRY_DELAY = 2_500;
+
 const logger = getLogger('api');
 
 @Injectable()
@@ -28,7 +34,6 @@ export class ApiService implements OnApplicationShutdown {
   private api: ApiPromise;
   private currentBlockHash: string;
   private currentBlockNumber: number;
-  private currentRuntimeVersion: RuntimeVersion;
   private apiOption: ApiOptions;
   networkMeta: NetworkMetadataPayload;
 
@@ -53,10 +58,14 @@ export class ApiService implements OnApplicationShutdown {
 
     let provider: WsProvider | HttpProvider;
     let throwOnConnect = false;
+
+    const headers = {
+      'User-Agent': `SubQuery-Node ${packageVersion}`,
+    };
     if (network.endpoint.startsWith('ws')) {
-      provider = new WsProvider(network.endpoint);
+      provider = new WsProvider(network.endpoint, RETRY_DELAY, headers);
     } else if (network.endpoint.startsWith('http')) {
-      provider = new HttpProvider(network.endpoint);
+      provider = new HttpProvider(network.endpoint, headers);
       throwOnConnect = true;
     }