Get cluster info

Get basic build, version, and cluster information. ::: In Serverless, version.number always reports the next target Elasticsearch release version at the time of the request. Serverless does not track to a traditional release versioning model; it is continuously updated. The version number is provided to maintain compatibility with existing clients, but it is not meaningful for assessing feature availability. Clients should detect a Serverless environment by checking for build_flavor: serverless.

Api key

Authorization: <value>

Elasticsearch APIs support key-based authentication. You must create an API key and use the encoded value in the request header. For example:

		curl -X GET "${ES_URL}/_cat/indices?v=true" \
  -H "Authorization: ApiKey ${API_KEY}"

To get API keys, use the /_security/api_key APIs.

Basic

Authorization: Basic <credentials>

Bearer

Authorization: Bearer <token>

Elasticsearch APIs support the use of bearer tokens in the Authorization HTTP header to authenticate with the API. For examples, refer to Token-based authentication services

Response

application/json

cluster_name string required: The responding cluster's name.
cluster_uuid string required
name string required: The responding node's name.
tagline string required
version object required: Version information for the Elasticsearch cluster. In Serverless, version.number always reports the next target Elasticsearch release version at the time of the request, not an actual deployed version. The version number is provided to maintain client compatibility but is not meaningful for assessing feature availability. Use build_flavor: serverless to detect a Serverless environment.

Examples

Request Console 1 / 8 languages

Console Kibana Dev Tools

GET /

JavaScript Elasticsearch JavaScript Client

const response = await client.info();

Python Elasticsearch Python Client

resp = client.info()

curl Shell

curl -X GET "$ELASTICSEARCH_URL/" \
  -H "Authorization: ApiKey $ELASTIC_API_KEY"

Java Elasticsearch Java Client

client.info();

C# Elasticsearch .NET Client

var response = await client.InfoAsync();

PHP Elasticsearch PHP Client

$resp = $client->info();

Ruby Elasticsearch Ruby Client

response = client.info

Response

A successful response from GET /.

{
  "name": "instance-0000000000",
  "cluster_name": "my_test_cluster",
  "cluster_uuid": "zk-HjQtYQGyL3NFSSu7InA",
  "version": {
    "number": "9.1.0",
    "build_flavor": "default",
    "build_type": "docker",
    "build_hash": 0,
    "build_date": "2025-07-09T22:10:13.578Z",
    "build_snapshot": false,
    "lucene_version": "10.2.2",
    "minimum_wire_compatibility_version": "8.19.0",
    "minimum_index_compatibility_version": "8.0.0"
  },
  "tagline": "You Know, for Search"
}

Get cluster info

Required authorization

Authentication

Response