Get cluster info

Get basic build, version, and cluster information. ::: In Serverless, this API is retained for backward compatibility only. Some response fields, such as the version number, should be ignored.

Required authorization

Authentication

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

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"
}