# Cancel a migration reindex operation

**POST /_migration/reindex/{index}/_cancel**

Cancel a migration reindex attempt for a data stream or index.


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


## Authentication methods
- Api key auth
- Basic auth
- Bearer auth


## Parameters

### Path parameters
- **index** (string | array[string])
  The index or data stream name



## Responses
### 200


#### Body: application/json (object)
- **acknowledged** (boolean)
  For a successful response, this value is always true. On failure, an exception is returned instead.


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