For which types of HTTP requests is the request body absent?

The request body is absent in HTTP requests of type GET, HEAD, and DELETE (in most cases).

• GET — used to retrieve data, and the body is usually not transmitted.
• HEAD — similar to GET, but only returns headers, without a body.
• DELETE — sometimes does not contain a body, although the specification does not prohibit it, but more often, the body is not used.

Unlike them, POST and PUT usually contain a body with data to be transmitted to the server.