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layout	title	parent	grand_parent	nav_order
default	Get controller	Controller APIs	ML Commons APIs	20

Get a controller

Introduced 2.12 {: .label .label-purple }

Use this API to retrieve information about a controller for a model by model ID.

Path and HTTP methods

GET /_plugins/_ml/controllers/<model_id>

Path parameters

The following table lists the available path parameters.

Parameter	Data type	Description
`model_id`	String	The model ID of the model for which to retrieve the controller.

Example request

GET /_plugins/_ml/controllers/T_S-cY0BKCJ3ot9qr0aP

{% include copy-curl.html %}

Example response

{
  "model_id": "T_S-cY0BKCJ3ot9qr0aP",
  "user_rate_limiter": {
    "user1": {
      "limit": "4",
      "unit": "MINUTES"
    },
    "user2": {
      "limit": "4",
      "unit": "MINUTES"
    }
  }
}

If there is no controller defined for the model, OpenSearch returns an error:

{
  "error": {
    "root_cause": [
      {
        "type": "status_exception",
        "reason": "Failed to find model controller with the provided model ID: T_S-cY0BKCJ3ot9qr0aP"
      }
    ],
    "type": "status_exception",
    "reason": "Failed to find model controller with the provided model ID: T_S-cY0BKCJ3ot9qr0aP"
  },
  "status": 404
}

Response fields

For response field descriptions, see Create Controller API request fields.

Required permissions

If you use the Security plugin, make sure you have the appropriate permissions: cluster:admin/opensearch/ml/controllers/get.

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