Get aliases

Comma-separated list of data streams or indices used to limit the request. Supports wildcards (*). To target all data streams and indices, omit this parameter or use * or _all.

Leave it out to use /_alias.

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.

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.

If false, the request returns an error if it targets a missing or closed index.