# Open anomaly detection jobs

**POST /_ml/anomaly_detectors/{job_id}/_open**

An anomaly detection job must be opened to be ready to receive and analyze
data. It can be opened and closed multiple times throughout its lifecycle.
When you open a new job, it starts with an empty model.
When you open an existing job, the most recent model state is automatically
loaded. The job is ready to resume its analysis from where it left off, once
new data is received.

## Required authorization

* Cluster privileges: `manage_ml`



## Servers
- http://api.example.com: http://api.example.com ()


## Authentication methods
- Api key auth


## Parameters

### Path parameters
- **job_id** (string)
  Identifier for the anomaly detection job.

### Query parameters
- **timeout** (string)
  Controls the time to wait until a job has opened.

### Body: application/json (object)

- **timeout** (string)
  Refer to the description for the `timeout` query parameter.


## Responses
### 200


#### Body: application/json (object)
- **opened** (boolean)

- **node** (string)
  The ID of the node that the job was started on. In serverless this will be the "serverless".
  If the job is allowed to open lazily and has not yet been assigned to a node, this value is an empty string.


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