# Check indices

**HEAD /{index}**

Check if one or more indices, index aliases, or data streams exist.


## 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])
  Comma-separated list of data streams, indices, and aliases. Supports wildcards (`*`).

### Query parameters
- **allow_no_indices** (boolean)
  If `false`, the request returns an error if any wildcard expression, index alias, or `_all` value targets only missing or closed indices.
  This behavior applies even if the request targets other open indices.
- **expand_wildcards** (string | array[string])
  Type of index that wildcard patterns can match.
  If the request can target data streams, this argument determines whether wildcard expressions match hidden data streams.
  Supports comma-separated values, such as `open,hidden`.

  Supported values include:
    - `all`: Match any data stream or index, including hidden ones.
    - `open`: Match open, non-hidden indices. Also matches any non-hidden data stream.
    - `closed`: Match closed, non-hidden indices. Also matches any non-hidden data stream. Data streams cannot be closed.
    - `hidden`: Match hidden data streams and hidden indices. Must be combined with `open`, `closed`, or `both`.
    - `none`: Wildcard expressions are not accepted.

- **flat_settings** (boolean)
  If `true`, returns settings in flat format.
- **ignore_unavailable** (boolean)
  If `false`, the request returns an error if it targets a missing or closed index.
- **include_defaults** (boolean)
  If `true`, return all default settings in the response.
- **local** (boolean)
  If `true`, the request retrieves information from the local node only.


## Responses
### 200



[Powered by Bump.sh](https://bump.sh)