diff --git a/README.md b/README.md
index 9e90b8a..821a2f7 100644
--- a/README.md
+++ b/README.md
@@ -148,7 +148,7 @@ API keys for the networks this plugin auto-configures via the `L1` and `L2` opti
 
 **L1**
 
-+ [ethereum][101]
++ [ethereum][101] (`gasPrice` and `baseFee` prices require an API key)
 + [polygon][102]
 + [binance][103]
 + [fantom][104]
diff --git a/src/utils/chains.ts b/src/utils/chains.ts
index 0bdd0f4..6e8df9d 100644
--- a/src/utils/chains.ts
+++ b/src/utils/chains.ts
@@ -28,7 +28,7 @@ export function getTokenForChain(options: GasReporterOptions): string {
  * @returns
  */
 export function getGasPriceUrlForChain(options: GasReporterOptions): string {
-  let apiKey = "";
+  let apiKey: string;
 
   if (options.gasPriceApi) return options.gasPriceApi;
 
@@ -44,6 +44,10 @@ export function getGasPriceUrlForChain(options: GasReporterOptions): string {
 
   if (!L1[options.L1!]) throw new Error();
 
+  apiKey = (options.L1Etherscan)
+      ? `${DEFAULT_API_KEY_ARGS}${options.L1Etherscan}`
+      : "";
+
   return `${L1[options.L1!].baseUrl}${DEFAULT_GAS_PRICE_API_ARGS}${apiKey}`;
 }
 
diff --git a/test/projects/options/hardhat.options.a.config.ts b/test/projects/options/hardhat.options.a.config.ts
index 1a45df3..5597d93 100644
--- a/test/projects/options/hardhat.options.a.config.ts
+++ b/test/projects/options/hardhat.options.a.config.ts
@@ -34,11 +34,11 @@ const config: HardhatUserConfig = {
   },
   gasReporter: {
     currency: "CHF",
-    L1: "polygon",
-    L1Etherscan: process.env.POLYGONSCAN_API_KEY,
+    L1: "ethereum",
+    L1Etherscan: process.env.ETHERSCAN_API_KEY,
     coinmarketcap: process.env.CMC_API_KEY,
     rst: true,
-    rstTitle: "Polygon Report",
+    rstTitle: "Ethereum Report",
     excludeContracts: ["EtherRouter/EtherRouter.sol"],
     showMethodSig: true,
     enabled: true,
diff --git a/test/projects/options/hardhat.options.e.config.ts b/test/projects/options/hardhat.options.e.config.ts
index a7f9f28..5c36fec 100644
--- a/test/projects/options/hardhat.options.e.config.ts
+++ b/test/projects/options/hardhat.options.e.config.ts
@@ -20,6 +20,7 @@ const config: HardhatUserConfig = {
   gasReporter: {
     coinmarketcap: process.env.CMC_API_KEY,
     L2: "optimism",
+    L1Etherscan: process.env.ETHERSCAN_API_KEY,
     L2Etherscan: process.env.OPTIMISTIC_API_KEY,
     enabled: true,
     reportPureAndViewMethods: true,