diff --git a/scripts/networks.js b/scripts/networks.js
index 517892f094..d63072f920 100644
--- a/scripts/networks.js
+++ b/scripts/networks.js
@@ -17,6 +17,7 @@ async function fetchData() {
         badgeURL
       }
       testnet
+      internal
       opStack
       defaultExplorer {
         url
diff --git a/src/core/types/chains.ts b/src/core/types/chains.ts
index 9b7dcd8f6d..f416f0874e 100644
--- a/src/core/types/chains.ts
+++ b/src/core/types/chains.ts
@@ -263,6 +263,7 @@ export interface BackendNetwork {
     badgeURL: string;
   };
   testnet: boolean;
+  internal: boolean;
   opStack: boolean;
   defaultExplorer: {
     url: string;
diff --git a/src/core/utils/backendNetworks.ts b/src/core/utils/backendNetworks.ts
index 740943eab9..a993ce2fe3 100644
--- a/src/core/utils/backendNetworks.ts
+++ b/src/core/utils/backendNetworks.ts
@@ -3,6 +3,8 @@ import { mainnet } from 'viem/chains';
 
 import { BackendNetwork } from '../types/chains';
 
+const INTERNAL_BUILD = process.env.INTERNAL_BUILD === 'true';
+
 const proxyBackendNetworkRpcEndpoint = (endpoint: string) => {
   return `${endpoint}${process.env.RPC_PROXY_API_KEY}`;
 };
@@ -47,5 +49,8 @@ export function transformBackendNetworksToChains(
   if (!networks) {
     return [];
   }
-  return networks.map((network) => transformBackendNetworkToChain(network));
+  // include all networks for internal builds, otherwise filter out flagged as internal
+  return networks
+    .filter((network) => !network.internal || INTERNAL_BUILD)
+    .map((network) => transformBackendNetworkToChain(network));
 }