XHR Poster[0] sounds like an extension you'll enjoy. It provides a much more comprehensive testing interface.
[0]http://goo.gl/UFSdZ (links to Chrome extension store)
[0]http://goo.gl/UFSdZ (links to Chrome extension store)
I had to build an API that lived inside a system with entirely too many authentication/cookie checks and using curl was becoming too awkward for testing, this saved me a lot of time.