<p> The <code>CreateHITWithHITType</code> operation creates a new Human Intelligence Task (HIT) using an existing HITTypeID generated by the <code>CreateHITType</code> operation. </p> <p> This is an alternative way to create HITs from the <code>CreateHIT</code> operation. This is the recommended best practice for Requesters who are creating large numbers of HITs. </p> <p>CreateHITWithHITType also supports several ways to provide question data: by providing a value for the <code>Question</code> parameter that fully specifies the contents of the HIT, or by providing a <code>HitLayoutId</code> and associated <code>HitLayoutParameters</code>. </p> <note> <p> If a HIT is created with 10 or more maximum assignments, there is an additional fee. For more information, see <a href="https://requester.mturk.com/pricing">Amazon Mechanical Turk Pricing</a>. </p> </note>

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

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