opensearch-docs-cn/_opensearch/rest-api/cat/cat-aliases.md

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---
layout: default
title: cat aliases
parent: CAT API
grand_parent: REST API reference
nav_order: 1
has_children: false
---
# cat aliases
Introduced 1.0
{: .label .label-purple }
The cat aliases operation lists the mapping of aliases to indices, plus routing and filtering information.
## Example
```json
GET _cat/aliases?v
```
To limit the information to a specific alias, add the alias name after your query:
```json
GET _cat/aliases/<alias>?v
```
If you want to get information for more than one alias, separate the alias names with commas:
```json
GET _cat/aliases/alias1,alias2,alias3
```
## Path and HTTP methods
```
GET _cat/aliases/<alias>
GET _cat/aliases
```
## URL parameters
All cat aliases URL parameters are optional.
In addition to the [common URL parameters]({{site.url}}{{site.baseurl}}/opensearch/rest-api/cat/index#common-url-parameters), you can specify the following parameters:
Parameter | Type | Description
:--- | :--- | :---
local | Boolean | Whether to return information from the local node only instead of from the master node. Default is false.
expand_wildcards | Enum | Expands wildcard expressions to concrete indices. Combine multiple values with commas. Supported values are `all`, `open`, `closed`, `hidden`, and `none`. Default is `open`.
## Response
The following response shows that `alias1` refers to a `movies` index and has a configured filter:
```json
alias | index | filter | routing.index | routing.search | is_write_index
alias1 | movies | * | - | - | -
.kibana | .kibana_1 | - | - | - | -
```
To learn more about index aliases, see [Index aliases]({{site.url}}{{site.baseurl}}/opensearch/index-alias).