OAuth: Receive callback with parameters as POST data

I'm new to OAuth, I'm using the oauth2 library on Python to get my work done.

Currently when I receive a callback from the server, the parameters come in the URL as:

http://mydomain/?oauth_verifier=(SOME_DATA)&oauth_token=(SOME_DATA)&oauth_callback_confirmed=true

I'm wondering if it's possible to instruct the server to somehow POST those parameters (oauth_verifier, oauth_token, oauth_callback_confirmed) to me as a callback and not show them in the URL (as a GET request)?

Thank you!