diff --git a/src/helpers/etherscan.ts b/src/helpers/etherscan.ts
index 1947d70..218a331 100644
--- a/src/helpers/etherscan.ts
+++ b/src/helpers/etherscan.ts
@@ -54,6 +54,10 @@ export const getTxsBlockRangeEtherscan = async (
   const endpoint = endpoints[chain];
   const apiKey = apiKeys[chain];
   let res;
+  if (!endpoint) {
+    console.error(`WARNING: No Etherscan endpoint found for chain ${chain}.`);
+    return [];
+  }
   if (!apiKey) {
     res = (
       await retry(