Bad Request Error

Bad Request Error

Using Postman, I added the TECHNICIAN_KEY to the header and got the following error:
"response_status": {
        "status_code": 4000,
        "messages": [
            {
                "status_code": 401,
                "type": "failed",
                "message": "V3API restricted for Path:/api/v3/requests Method:POST"
            }
        ],
        "status": "failed"
    }

Is this a permissions error?