Is it permissible to use the request body in a GET method to pass data?

Using the request body in an HTTP GET method is not standard practice and is not recommended. According to the HTTP specification, GET requests are intended for retrieving data and typically pass parameters through the URL (query string). Many servers and proxies may ignore or improperly handle the body in GET requests, which can lead to unpredictable behavior.

If you need to send data to the server, it is better to use POST, PUT, or other methods that officially support a request body.

Example of a proper GET request with parameters:

GET /search?query=example HTTP/1.1
Host: example.com

The body in a GET request is usually ignored and should not be used.