IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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Exists API

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Exists API

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Checks if a data stream, index, or alias exists.

HEAD my-data-stream

Request

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HEAD <target>

Prerequisites

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If the Elasticsearch security features are enabled, you must have the view_index_metadata or manage index privilege for the target.

Path parameters

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<target>: (Optional, string) Comma-separated list of data streams, indices, and aliases. Supports wildcards (*).

Query parameters

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allow_no_indices

(Optional, 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. For example, a request targeting foo*,bar* returns an error if an index starts with foo but no index starts with bar.

Defaults to true.

expand_wildcards

(Optional, string) Type of index that wildcard expressions 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. Valid values are:

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.

Defaults to open.

flat_settings

(Optional, Boolean) If true, returns settings in flat format. Defaults to false.

include_defaults

(Optional, Boolean) If true, return all default settings in the response. Defaults to false.

ignore_unavailable

(Optional, Boolean) If false, the request returns an error if it targets a missing or closed index. Defaults to false.

local

(Optional, Boolean) If true, the request retrieves information from the local node only. Defaults to false, which means information is retrieved from the master node.

Response codes

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200: All targets exist.
404: One or more specified targets do not exist.

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