diff --git a/packages/core/src/network/config/chainConfigs.ts b/packages/core/src/network/config/chainConfigs.ts
index f19ee3927..8f2178c4c 100644
--- a/packages/core/src/network/config/chainConfigs.ts
+++ b/packages/core/src/network/config/chainConfigs.ts
@@ -75,7 +75,7 @@ const baseSepolia: ChainConfig = {
 
 export const happyChainSepolia: ChainConfig = {
   ...happyChainDef,
-  indexerUrl: "http://localhost:3001", // ## [happyTODO :: deploy indexer and then add the URL here] ##
+  indexerUrl: "https://primodium-indexer.happy.tech/",
 };
 
 export type ChainConfig = MUDChain & { indexerUrl?: string };