Can POST be used to retrieve data?

Yes, technically it is possible to use POST to retrieve data, but this does not conform to RESTful practices and HTTP standards. Usually, the GET method is used for retrieving data, as it is designed for safe and idempotent requests.

POST, on the other hand, is intended for creating or modifying resources and can have side effects. Sometimes, POST is used to retrieve data if the request contains a large volume of parameters or sensitive data that you do not want to pass in the URL (GET passes parameters in the query string).

Example: a request with large filters or complex JSON structure can be sent via POST to avoid URL length limitations.

However, from an architectural and caching perspective, GET is preferred for data retrieval.