<p>Requests the cancellation of a calculation. A <code>StopCalculationExecution</code> call on a calculation that is already in a terminal state (for example, <code>STOPPED</code>, <code>FAILED</code>, or <code>COMPLETED</code>) succeeds but has no effect.</p> <note> <p>Cancelling a calculation is done on a best effort basis. If a calculation cannot be cancelled, you can be charged for its completion. If you are concerned about being charged for a calculation that cannot be cancelled, consider terminating the session in which the calculation is running.</p> </note>

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

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