diff --git a/config.json b/config.json
index 644cc0e..66c4fe1 100644
--- a/config.json
+++ b/config.json
@@ -16,6 +16,7 @@
         "MAX_LIMIT_CAP": 5000
     },
     "MAINNET_BALANCE_CHECK_RPC": "https://api.avax.network/ext/C/rpc",
+    "MAINNET_BALANCE_CHECK_CHAIN_ID": 43114,
     "evmchains": [
         {
             "ID": "C",
diff --git a/server.ts b/server.ts
index 286a196..a8e7ba6 100644
--- a/server.ts
+++ b/server.ts
@@ -20,6 +20,7 @@ import {
     NATIVE_CLIENT,
     DEBUG,
     MAINNET_BALANCE_CHECK_RPC,
+    MAINNET_BALANCE_CHECK_CHAIN_ID,
 } from './config.json'
 import { CouponService } from './CouponService/couponService'
 import {
@@ -190,7 +191,7 @@ router.post('/sendToken', captcha.middleware, async (req: any, res: any) => {
 // GET request for fetching all the chain and token configurations
 router.get('/getChainConfigs', (req: any, res: any) => {
     const configs: any = [...evmchains, ...erc20tokens]
-    res.send({ configs, MAINNET_BALANCE_CHECK_RPC })
+    res.send({ configs, MAINNET_BALANCE_CHECK_RPC, MAINNET_BALANCE_CHECK_CHAIN_ID })
 })
 
 // GET request for fetching faucet address for the specified chain