Principles

The Elasticsearch Service API is built on REST. This means that:

URLs are based on resource IDs.
JSON is the data interchange format.
Standard HTTP response codes and verbs are used.

RESTful API calls are stateless. Every request that you make happens in isolation from other calls and must include all the information necessary for Elasticsearch Service to fulfill the request. API requests return JSON output, which is a format that is machine-readable and works well for automation.

Calls to API endpoints require different request methods, depending on what they do. You use these four request methods to communicate with the Elasticsearch Service RESTful API:

To fetch a resource: GET
To create a new resource: POST
To update an existing resource: PUT or PATCH
To delete a resource: DELETE

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