Is it possible to attach a request body in a GET method using data sent via POST?

According to the HTTP standard, the GET method is not intended to send a request body, and most servers and clients ignore the body in GET requests. Unlike POST, where the body is used to transmit data, GET transmits parameters via the URL (query string).

Although technically some libraries allow adding a body to GET, this is not considered best practice and can lead to unpredictable behavior.

If you need to transmit data, use:

• For small amounts — parameters in the URL (query string).
• For larger or sensitive data — the POST method with a request body.

Example of passing parameters in GET:

var client = new HttpClient();
var response = await client.GetAsync("https://example.com/api/items?category=books&sort=price");

Thus, the request body is not used for GET, and data typically sent via POST should not be attached to GET.