diff --git a/src/client/lcd/APIRequester.ts b/src/client/lcd/APIRequester.ts
index a9d2d5e0..0324652f 100644
--- a/src/client/lcd/APIRequester.ts
+++ b/src/client/lcd/APIRequester.ts
@@ -1,5 +1,6 @@
 import Axios, { AxiosInstance } from 'axios';
 import { OrderBy as OrderBy_pb } from '@terra-money/legacy.proto/cosmos/tx/v1beta1/service';
+import { AxiosConfig } from './LCDClient';
 
 export type APIParams = Record<string, string | number | null | undefined>;
 
@@ -24,15 +25,25 @@ export class APIRequester {
   private axios: AxiosInstance;
   private readonly baseURL: string;
 
-  constructor(baseURL: string) {
+  constructor(baseURL: string, axiosConfig?: AxiosConfig) {
     this.baseURL = baseURL;
 
-    this.axios = Axios.create({
-      headers: {
-        Accept: 'application/json',
-      },
-      timeout: 30000,
-    });
+    if (axiosConfig?.apiToken) {
+      this.axios = Axios.create({
+        headers: {
+          Accept: 'application/json',
+          Authorization: `Bearer ${axiosConfig.apiToken}`,
+        },
+        timeout: 30000,
+      });
+    } else {
+      this.axios = Axios.create({
+        headers: {
+          Accept: 'application/json',
+        },
+        timeout: 30000,
+      });
+    }
   }
 
   private computeEndpoint(endpoint: string) {
diff --git a/src/client/lcd/LCDClient.ts b/src/client/lcd/LCDClient.ts
index 87c63eb6..6185bbbc 100644
--- a/src/client/lcd/LCDClient.ts
+++ b/src/client/lcd/LCDClient.ts
@@ -28,7 +28,19 @@ import { GovV1API } from './api/GovV1API';
 import { ICAv1API } from './api/ICAv1API';
 import { ICQv1API } from './api/ICQv1API';
 
+export type AxiosConfig = {
+  /**
+   * The API key to be included in requests sent to the LCD.
+   */
+  apiToken?: string;
+};
+
 export interface LCDClientConfig {
+  /**
+   * The Axios configuration to use when making requests to the LCD.
+   */
+  axiosConfig?: AxiosConfig;
+
   /**
    * The base URL to which LCD requests will be made.
    */
@@ -142,7 +154,10 @@ export class LCDClient {
 
     this.apiRequesters = Object.keys(chains).reduce(
       (result: Record<string, APIRequester>, chainID) => {
-        result[chainID] = new APIRequester(chains[chainID].lcd);
+        result[chainID] = new APIRequester(
+          chains[chainID].lcd,
+          chains[chainID].axiosConfig
+        );
         return result;
       },
       {}