[[cat-component-templates]]
=== cat component templates API
++++
<titleabbrev>cat component templates</titleabbrev>
++++

[IMPORTANT]
====
cat APIs are only intended for human consumption using the command line or {kib} 
console. They are _not_ intended for use by applications. For application 
consumption, use the <<getting-component-templates,get component template API>>.
====

Returns information about <<indices-component-template,component templates>> in
a cluster. Component templates are building blocks for constructing
<<index-templates,index templates>> that specify index <<mapping,mappings>>,
<<index-modules-settings,settings>>, and <<aliases,aliases>>.


[[cat-component-templates-api-request]]
==== {api-request-title}

`GET /_cat/component_templates/<template_name>`

`GET /_cat/component_templates`

[[cat-component-templates-api-prereqs]]
==== {api-prereq-title}

* If the {es} {security-features} are enabled, you must have the `monitor` or
`manage` <<privileges-list-cluster,cluster privilege>> to use this API.

[[cat-component-templates-path-params]]
==== {api-path-parms-title}

`<template_name>`::
(Optional, string) The name of the component template to return. Accepts
wildcard expressions. If omitted, all component templates are returned.

[[cat-component-templates-query-params]]
==== {api-query-parms-title}

include::{es-ref-dir}/rest-api/common-parms.asciidoc[tag=http-format]

include::{es-ref-dir}/rest-api/common-parms.asciidoc[tag=cat-h]

include::{es-ref-dir}/rest-api/common-parms.asciidoc[tag=help]

include::{es-ref-dir}/rest-api/common-parms.asciidoc[tag=local]

include::{es-ref-dir}/rest-api/common-parms.asciidoc[tag=master-timeout]

include::{es-ref-dir}/rest-api/common-parms.asciidoc[tag=cat-s]

include::{es-ref-dir}/rest-api/common-parms.asciidoc[tag=cat-v]


[[cat-component-templates-api-example]]
==== {api-examples-title}

////
[source,console]
----
PUT _component_template/my-template-1
{
  "template": {
    "settings": {
      "number_of_shards": 1
    }
  }
}

PUT _component_template/my-template-2
{
  "template": {
    "mappings": {
      "_source": {
        "enabled": false
      },
      "properties": {
        "host_name": {
          "type": "keyword"
        },
        "created_at": {
          "type": "date",
          "format": "EEE MMM dd HH:mm:ss Z yyyy"
        }
      }
    }
  }
}

PUT _index_template/my-index-template
{
  "index_patterns": [
    "my-index*"
  ],
  "composed_of": [
    "my-template-1",
    "my-template-2"
  ]
}
----
////

[source,console]
----
GET _cat/component_templates/my-template-*?v=true&s=name
----
// TEST[continued]

The API returns the following response:

[source,txt]
----
name          version alias_count mapping_count settings_count metadata_count included_in
my-template-1         0           0             1              0              [my-index-template]
my-template-2         0           3             0              0              [my-index-template]
----
// TESTRESPONSE[s/\*/\\*/ s/\[/\\[/ s/\]/\\]/ non_json]

////
[source,console]
----
DELETE _index_template/my-index-template
DELETE _component_template/my-template-1
DELETE _component_template/my-template-2
----
// TEST[continued]
////