diff --git a/common/changes/@snowplow/browser-tracker-core/feature-1185-id-service-option_2023-05-11-20-22.json b/common/changes/@snowplow/browser-tracker-core/feature-1185-id-service-option_2023-05-11-20-22.json
new file mode 100644
index 000000000..de331a7c7
--- /dev/null
+++ b/common/changes/@snowplow/browser-tracker-core/feature-1185-id-service-option_2023-05-11-20-22.json
@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@snowplow/browser-tracker-core",
+      "comment": "Add idService option",
+      "type": "none"
+    }
+  ],
+  "packageName": "@snowplow/browser-tracker-core"
+}
\ No newline at end of file
diff --git a/common/changes/@snowplow/browser-tracker/feature-1185-id-service-option_2023-05-12-07-26.json b/common/changes/@snowplow/browser-tracker/feature-1185-id-service-option_2023-05-12-07-26.json
new file mode 100644
index 000000000..934020399
--- /dev/null
+++ b/common/changes/@snowplow/browser-tracker/feature-1185-id-service-option_2023-05-12-07-26.json
@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@snowplow/browser-tracker",
+      "comment": "Add idService option",
+      "type": "none"
+    }
+  ],
+  "packageName": "@snowplow/browser-tracker"
+}
\ No newline at end of file
diff --git a/libraries/browser-tracker-core/src/tracker/index.ts b/libraries/browser-tracker-core/src/tracker/index.ts
index 8669b9375..61efb6e46 100755
--- a/libraries/browser-tracker-core/src/tracker/index.ts
+++ b/libraries/browser-tracker-core/src/tracker/index.ts
@@ -301,7 +301,8 @@ export function Tracker(
         trackerConfiguration.customHeaders ?? {},
         trackerConfiguration.withCredentials ?? true,
         trackerConfiguration.retryStatusCodes ?? [],
-        (trackerConfiguration.dontRetryStatusCodes ?? []).concat([400, 401, 403, 410, 422])
+        (trackerConfiguration.dontRetryStatusCodes ?? []).concat([400, 401, 403, 410, 422]),
+        trackerConfiguration.idService || ''
       ),
       // Whether pageViewId should be regenerated after each trackPageView. Affect web_page context
       preservePageViewId = false,
diff --git a/libraries/browser-tracker-core/src/tracker/out_queue.ts b/libraries/browser-tracker-core/src/tracker/out_queue.ts
index b838ba436..3efb128ae 100644
--- a/libraries/browser-tracker-core/src/tracker/out_queue.ts
+++ b/libraries/browser-tracker-core/src/tracker/out_queue.ts
@@ -63,6 +63,7 @@ export interface OutQueue {
  * @param withCredentials - Sets the value of the withCredentials flag on XMLHttpRequest (GET and POST) requests
  * @param retryStatusCodes – Failure HTTP response status codes from Collector for which sending events should be retried (they can override the `dontRetryStatusCodes`)
  * @param dontRetryStatusCodes – Failure HTTP response status codes from Collector for which sending events should not be retried
+ * @param idService - Id service full URL. This URL will be added to the queue and will be called using a GET method.
  * @returns object OutQueueManager instance
  */
 export function OutQueueManager(
@@ -81,16 +82,21 @@ export function OutQueueManager(
   customHeaders: Record<string, string>,
   withCredentials: boolean,
   retryStatusCodes: number[],
-  dontRetryStatusCodes: number[]
+  dontRetryStatusCodes: number[],
+  idService?: string
 ): OutQueue {
   type PostEvent = {
     evt: Record<string, unknown>;
     bytes: number;
   };
 
+  type IdServiceCall = {
+    url: string;
+  };
+
   let executingQueue = false,
     configCollectorUrl: string,
-    outQueue: Array<PostEvent> | Array<string> = [];
+    outQueue: Array<string | PostEvent | IdServiceCall> = [];
 
   //Force to lower case if its a string
   eventMethod = typeof eventMethod === 'string' ? eventMethod.toLowerCase() : eventMethod;
@@ -147,6 +153,10 @@ export function OutQueueManager(
     });
   }
 
+  if (idService) {
+    outQueue.push({ url: idService });
+  }
+
   /*
    * Convert a dictionary to a querystring
    * The context field is the last in the querystring
@@ -221,8 +231,8 @@ export function OutQueueManager(
     return len;
   }
 
-  const postable = (queue: Array<PostEvent> | Array<string>): queue is Array<PostEvent> => {
-    return typeof queue[0] === 'object';
+  const postable = (queue: Array<PostEvent | string | IdServiceCall>): queue is Array<PostEvent> => {
+    return typeof queue[0] === 'object' && 'evt' in queue[0];
   };
 
   /**
@@ -293,7 +303,7 @@ export function OutQueueManager(
       outQueue.shift();
     }
 
-    if (outQueue.length < 1) {
+    if (!outQueue.length) {
       executingQueue = false;
       return;
     }
@@ -322,12 +332,16 @@ export function OutQueueManager(
       };
 
       let url: string, xhr: XMLHttpRequest, numberToSend: number;
-      if (postable(outQueue)) {
+      if (instanceOfIdServiceCall(outQueue[0])) {
+        url = outQueue[0].url;
+        xhr = initializeXMLHttpRequest(outQueue[0].url, false, sync);
+        numberToSend = 1;
+      } else if (postable(outQueue)) {
         url = configCollectorUrl;
         xhr = initializeXMLHttpRequest(url, true, sync);
         numberToSend = chooseHowManyToSend(outQueue);
       } else {
-        url = createGetUrl(outQueue[0]);
+        url = createGetUrl(outQueue[0] as string);
         xhr = initializeXMLHttpRequest(url, false, sync);
         numberToSend = 1;
       }
@@ -423,7 +437,7 @@ export function OutQueueManager(
         executingQueue = false;
       };
 
-      image.src = createGetUrl(outQueue[0]);
+      image.src = createGetUrl(outQueue[0] as string);
 
       setTimeout(function () {
         if (loading && executingQueue) {
@@ -567,4 +581,8 @@ export function OutQueueManager(
       return useragent.match('Chrom(e|ium)');
     }
   }
+
+  function instanceOfIdServiceCall(object: any): object is IdServiceCall {
+    return typeof object === 'object' && 'url' in object;
+  }
 }
diff --git a/libraries/browser-tracker-core/src/tracker/types.ts b/libraries/browser-tracker-core/src/tracker/types.ts
index 45751c533..83ee1236f 100755
--- a/libraries/browser-tracker-core/src/tracker/types.ts
+++ b/libraries/browser-tracker-core/src/tracker/types.ts
@@ -237,6 +237,13 @@ export type TrackerConfiguration = {
    * By default, the tracker retries on all non-success status codes except for 400, 401, 403, 410, and 422.
    */
   dontRetryStatusCodes?: number[];
+  /**
+   * Id service full URL. This URL will be added to the queue and will be called using a GET method.
+   * This option is there to allow the service URL to be called in order to set any required identifiers e.g. extra cookies.
+   *
+   * The request respects the `anonymousTracking` option, including the SP-Anonymous header if needed, and any additional custom headers from the customHeaders option.
+   */
+  idService?: string;
 };
 
 /**
diff --git a/trackers/browser-tracker/docs/browser-tracker.api.md b/trackers/browser-tracker/docs/browser-tracker.api.md
index 2a1762eb1..f4e27006e 100644
--- a/trackers/browser-tracker/docs/browser-tracker.api.md
+++ b/trackers/browser-tracker/docs/browser-tracker.api.md
@@ -347,6 +347,7 @@ export type TrackerConfiguration = {
     customHeaders?: Record<string, string>;
     retryStatusCodes?: number[];
     dontRetryStatusCodes?: number[];
+    idService?: string;
 };
 
 // @public