Using HTTP verbs with snapshot requests

Is there currently any way to test URLs with, say, a POST request? If not, this could be really handy for a lot of folks. It could also represent a part of the solution to the dynamic data issue. For example, my app loads a bunch of dynamic data that changes often. If I could make a POST request with params, I could pass a stub of static data to ensure the reference and the test are using consistent content.