diff --git a/client/transport/rest/src/main/java/org/a2aproject/sdk/client/transport/rest/RestTransport.java b/client/transport/rest/src/main/java/org/a2aproject/sdk/client/transport/rest/RestTransport.java
index 404ab7a3b..1f6535250 100644
--- a/client/transport/rest/src/main/java/org/a2aproject/sdk/client/transport/rest/RestTransport.java
+++ b/client/transport/rest/src/main/java/org/a2aproject/sdk/client/transport/rest/RestTransport.java
@@ -141,7 +141,7 @@ public Task getTask(TaskQueryParams taskQueryParams, @Nullable ClientCallContext
         try {
             StringBuilder url = new StringBuilder(Utils.buildBaseUrl(agentInterface, taskQueryParams.tenant()));
             if (taskQueryParams.historyLength() != null && taskQueryParams.historyLength() > 0) {
-                url.append(String.format("/tasks/%1s?historyLength=%2d", taskQueryParams.id(), taskQueryParams.historyLength()));
+                url.append(String.format("/tasks/%s?historyLength=%d", taskQueryParams.id(), taskQueryParams.historyLength()));
             } else {
                 url.append(String.format("/tasks/%1s", taskQueryParams.id()));
             }
diff --git a/client/transport/rest/src/test/java/org/a2aproject/sdk/client/transport/rest/RestTransportTest.java b/client/transport/rest/src/test/java/org/a2aproject/sdk/client/transport/rest/RestTransportTest.java
index 73e45a330..05d1b7b12 100644
--- a/client/transport/rest/src/test/java/org/a2aproject/sdk/client/transport/rest/RestTransportTest.java
+++ b/client/transport/rest/src/test/java/org/a2aproject/sdk/client/transport/rest/RestTransportTest.java
@@ -189,6 +189,7 @@ public void testGetTask() throws Exception {
                 request()
                         .withMethod("GET")
                         .withPath("/tasks/de38c76d-d54c-436c-8b9f-4c2703648d64")
+                        .withQueryStringParameter("historyLength", "5")
         )
                 .respond(
                         response()
@@ -196,7 +197,7 @@ public void testGetTask() throws Exception {
                                 .withBody(GET_TASK_TEST_RESPONSE)
                 );
         ClientCallContext context = null;
-        TaskQueryParams request = new TaskQueryParams("de38c76d-d54c-436c-8b9f-4c2703648d64", 10);
+        TaskQueryParams request = new TaskQueryParams("de38c76d-d54c-436c-8b9f-4c2703648d64", 5);
         RestTransport instance = new RestTransport(CARD);
         Task task = instance.getTask(request, context);
         assertEquals("de38c76d-d54c-436c-8b9f-4c2703648d64", task.id());
diff --git a/compat-0.3/client/transport/rest/src/main/java/org/a2aproject/sdk/compat03/client/transport/rest/RestTransport_v0_3.java b/compat-0.3/client/transport/rest/src/main/java/org/a2aproject/sdk/compat03/client/transport/rest/RestTransport_v0_3.java
index 7a8e6a1ec..272e3c2f1 100644
--- a/compat-0.3/client/transport/rest/src/main/java/org/a2aproject/sdk/compat03/client/transport/rest/RestTransport_v0_3.java
+++ b/compat-0.3/client/transport/rest/src/main/java/org/a2aproject/sdk/compat03/client/transport/rest/RestTransport_v0_3.java
@@ -140,7 +140,7 @@ public Task_v0_3 getTask(TaskQueryParams_v0_3 taskQueryParams, @Nullable ClientC
         try {
             String url;
             if (taskQueryParams.historyLength() > 0) {
-                url = agentUrl + String.format("/v1/tasks/%1s?historyLength=%2d", taskQueryParams.id(), taskQueryParams.historyLength());
+                url = agentUrl + String.format("/v1/tasks/%s?historyLength=%d", taskQueryParams.id(), taskQueryParams.historyLength());
             } else {
                 url = agentUrl + String.format("/v1/tasks/%1s", taskQueryParams.id());
             }
diff --git a/compat-0.3/client/transport/rest/src/test/java/org/a2aproject/sdk/compat03/client/transport/rest/RestTransport_v0_3_Test.java b/compat-0.3/client/transport/rest/src/test/java/org/a2aproject/sdk/compat03/client/transport/rest/RestTransport_v0_3_Test.java
index af841eac6..de51b8693 100644
--- a/compat-0.3/client/transport/rest/src/test/java/org/a2aproject/sdk/compat03/client/transport/rest/RestTransport_v0_3_Test.java
+++ b/compat-0.3/client/transport/rest/src/test/java/org/a2aproject/sdk/compat03/client/transport/rest/RestTransport_v0_3_Test.java
@@ -188,6 +188,7 @@ public void testGetTask() throws Exception {
                 request()
                         .withMethod("GET")
                         .withPath("/v1/tasks/de38c76d-d54c-436c-8b9f-4c2703648d64")
+                        .withQueryStringParameter("historyLength", "5")
         )
                 .respond(
                         response()
@@ -195,7 +196,7 @@ public void testGetTask() throws Exception {
                                 .withBody(GET_TASK_TEST_RESPONSE)
                 );
         ClientCallContext_v0_3 context = null;
-        TaskQueryParams_v0_3 request = new TaskQueryParams_v0_3("de38c76d-d54c-436c-8b9f-4c2703648d64", 10);
+        TaskQueryParams_v0_3 request = new TaskQueryParams_v0_3("de38c76d-d54c-436c-8b9f-4c2703648d64", 5);
         RestTransport_v0_3 instance = new RestTransport_v0_3(CARD);
         Task_v0_3 task = instance.getTask(request, context);
         assertEquals("de38c76d-d54c-436c-8b9f-4c2703648d64", task.id());