<p>Used by activity workers to report to the service that the <a>ActivityTask</a> represented by the specified <code>taskToken</code> is still making progress. The worker can also specify details of the progress, for example percent complete, using the <code>details</code> parameter. This action can also be used by the worker as a mechanism to check if cancellation is being requested for the activity task. If a cancellation is being attempted for the specified task, then the boolean <code>cancelRequested</code> flag returned by the service is set to <code>true</code>.</p> <p>This action resets the <code>taskHeartbeatTimeout</code> clock. The <code>taskHeartbeatTimeout</code> is specified in <a>RegisterActivityType</a>.</p> <p>This action doesn't in itself create an event in the workflow execution history. However, if the task times out, the workflow execution history contains a <code>ActivityTaskTimedOut</code> event that contains the information from the last heartbeat generated by the activity worker.</p> <note> <p>The <code>taskStartToCloseTimeout</code> of an activity type is the maximum duration of an activity task, regardless of the number of <a>RecordActivityTaskHeartbeat</a> requests received. The <code>taskStartToCloseTimeout</code> is also specified in <a>RegisterActivityType</a>.</p> </note> <note> <p>This operation is only useful for long-lived activities to report liveliness of the task and to determine if a cancellation is being attempted.</p> </note> <important> <p>If the <code>cancelRequested</code> flag returns <code>true</code>, a cancellation is being attempted. If the worker can cancel the activity, it should respond with <a>RespondActivityTaskCanceled</a>. Otherwise, it should ignore the cancellation request.</p> </important> <p> <b>Access Control</b> </p> <p>You can use IAM policies to control this action's access to Amazon SWF resources as follows:</p> <ul> <li> <p>Use a <code>Resource</code> element with the domain name to limit the action to only specified domains.</p> </li> <li> <p>Use an <code>Action</code> element to allow or deny permission to call this action.</p> </li> <li> <p>You cannot use an IAM policy to constrain this action's parameters.</p> </li> </ul> <p>If the caller doesn't have sufficient permissions to invoke the action, or the parameter values fall outside the specified constraints, the action fails. The associated event attribute's <code>cause</code> parameter is set to <code>OPERATION_NOT_PERMITTED</code>. For details and example IAM policies, see <a href="https://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dev-iam.html">Using IAM to Manage Access to Amazon SWF Workflows</a> in the <i>Amazon SWF Developer Guide</i>.</p>

{
  "success": true,
  "data": {
    "id": "abc123",
    "created_at": "2025-01-01T00:00:00Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters"
  }
}