diff --git a/packages/keychain/.env.development b/packages/keychain/.env.development
index 2c340ed62..970a36e74 100644
--- a/packages/keychain/.env.development
+++ b/packages/keychain/.env.development
@@ -4,3 +4,5 @@ NEXT_PUBLIC_ADMIN_URL="http://localhost:3002"
 NEXT_PUBLIC_API_URL="http://localhost:8000"
 # NEXT_PUBLIC_ETH_RPC_MAINNET="https://eth-mainnet.g.alchemy.com/v2/OGPRMquXP3K7oTkLrmVZpjCd1DswtYz3"
 # NEXT_PUBLIC_ETH_RPC_SEPOLIA="https://eth-sepolia.g.alchemy.com/v2/mURnclB5pn5elDfyzgTN4W2GR-rOYevI"
+# NEXT_PUBLIC_RPC_MAINNET="http://localhost:8001/x/starknet/mainnet"
+NEXT_PUBLIC_RPC_SEPOLIA="http://localhost:8001/x/starknet/sepolia"
diff --git a/packages/keychain/.env.production b/packages/keychain/.env.production
index c50b04675..734d2a8ec 100644
--- a/packages/keychain/.env.production
+++ b/packages/keychain/.env.production
@@ -4,3 +4,5 @@ NEXT_PUBLIC_ADMIN_URL="https://cartridge.gg"
 NEXT_PUBLIC_API_URL="https://api.cartridge.gg"
 # NEXT_PUBLIC_ETH_RPC_MAINNET="https://eth-mainnet.g.alchemy.com/v2/OGPRMquXP3K7oTkLrmVZpjCd1DswtYz3"
 # NEXT_PUBLIC_ETH_RPC_SEPOLIA="https://eth-sepolia.g.alchemy.com/v2/mURnclB5pn5elDfyzgTN4W2GR-rOYevI"
+# NEXT_PUBLIC_RPC_MAINNET="https://api.cartridge.gg/x/starknet/mainnet"
+NEXT_PUBLIC_RPC_SEPOLIA="https://api.cartridge.gg/x/starknet/sepolia"
diff --git a/packages/keychain/src/hooks/connection.tsx b/packages/keychain/src/hooks/connection.tsx
index 171b8e733..eb83c1443 100644
--- a/packages/keychain/src/hooks/connection.tsx
+++ b/packages/keychain/src/hooks/connection.tsx
@@ -97,7 +97,7 @@ export function ConnectionProvider({ children }: PropsWithChildren) {
     // Set rpc and origin if we're not embedded (eg Slot auth/session)
     if (!isIframe()) {
       setOrigin(urlParams.get("origin") || process.env.NEXT_PUBLIC_ORIGIN);
-      setRpcUrl(urlParams.get("rpc_url"));
+      setRpcUrl(urlParams.get("rpc_url") || process.env.NEXT_PUBLIC_RPC_SEPOLIA);
     }
 
     const prefundParam = urlParams.get("prefunds");