diff --git a/src/server.ts b/src/server.ts
index 3c32b4180..030918340 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -65,6 +65,7 @@ function _getAmountInLumens(amt: BigNumber) {
  * @param {boolean} [opts.allowHttp] - Allow connecting to http servers, default: `false`. This must be set to false in production deployments! You can also use {@link Config} class to set this globally.
  * @param {string} [opts.appName] - Allow set custom header `X-App-Name`, default: `undefined`.
  * @param {string} [opts.appVersion] - Allow set custom header `X-App-Version`, default: `undefined`.
+ * @param {string} [opts.authToken] - Allow set custom header `X-Auth-Token`, default: `undefined`.
  */
 export class Server {
   /**
@@ -90,6 +91,9 @@ export class Server {
     if (opts.appVersion) {
       customHeaders["X-App-Version"] = opts.appVersion;
     }
+    if (opts.authToken) {
+      customHeaders["X-Auth-Token"] = opts.authToken;
+    }
     if (!isEmpty(customHeaders)) {
       HorizonAxiosClient.interceptors.request.use((config) => {
         // merge the custom headers with an existing headers
@@ -821,6 +825,7 @@ export namespace Server {
     allowHttp?: boolean;
     appName?: string;
     appVersion?: string;
+    authToken?: string;
   }
 
   export interface Timebounds {