Google AI Platform Online Prediction - Permission Denied when using REST API

Question

I have created a version of a machine learning model (scikit-learn house prices example) on the Google Cloud AI Platform. I am now following the instructions on this page to test it with online predictions. The prediction is returned perfectly when I request through gcloud, however when I try to use REST API with curl I receive a "Permission Denied" 403 error. My request and the error response are below (I replaced the PROJECT_ID, MODEL_NAME and VERSION_NAME as needed in my request):

REQUEST:

curl -X POST -H "Content-Type: application/json" -d @input.json \
-H "Authorization: Bearer `gcloud auth print-access-token`" \
"https://ml.googleapis.com/v1/projects/${PROJECT_ID}/models/${MODEL_NAME}/versions/${VERSION_NAME}:predict"

ERROR:

{
  "error": {
    "code": 403,
    "message": "Permission denied on resource project #271903.",
    "status": "PERMISSION_DENIED",
    "details": [
      {
        "@type": "type.googleapis.com/google.rpc.Help",
        "links": [
          {
            "description": "Google developer console API key",
            "url": "https://console.developers.google.com/project/271903/apiui/credential"
          }
        ]
      }
    ]
  }
}

As I understand permission should be granted through the access token requested with gcloud auth print-access-token. I have also tried entering that command separately and copying in the token manually, but I receive the same error. I have also tried including the json data directly in the request.

Does anyone know this might be happening? Any help is really appreciated!

Tim Tim · Accepted Answer · 2020-04-13T18:32:57

In case this is useful for anyone else, it was my mistake in the request. I replaced the parameters inside the curly brackets rather than replacing the whole variable (between the forward slashes). Correcting this solves the problem and prediction now works.

Google AI Platform Online Prediction - Permission Denied when using REST API

1 Answers