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API Overview

Elasticsearch offers many APIs. This section describes some basic APIs. Visit the Elasticsearch official site for complete API information.

Index Operations

**Table 1** Index operations
Operation	Description
PUT /index	Creates an index.
DELETE /index	Deletes an index.
PUT /index/_doc/id	Indexes a document.
POST /index/_doc	Indexes a document (with an auto-generated ID).
GET /index/_doc/id	Retrieves a document.
DELETE /index/_doc/id	Deletes a document.

Search Operations

**Table 2** Search operations
Operation	Description
GET /index/_search	Searches a document.
POST /index/_search	Performs an advanced search. It supports complex query conditions and aggregations.

Cluster Management

**Table 3** Cluster management operations
Operation	Description
GET /_cluster/health	Obtains the cluster health status.
GET /_cluster/state	Obtains the cluster status.
POST /_cluster/reroute	Manually reallocates shards.

Node Management

**Table 4** Node management operations
Operation	Description
GET /_nodes	Obtains node information.
GET /_nodes/stats	Obtains node statistics.

Parent topic: Elasticsearch Description