Responding to your requests, one of the most popular actions has just got an upgrade with new functionalities. For Buddy newcomers, the action is available in the DevOps section of the action list:
Not Only POST
With only POST requests previously available, the HTTP action now supports PUT, PATCH, GET & DELETE.
For POST, PUT & PATCH payload you can use these variables.
Along with the payload you can now also send custom headers. Just click More options in the action details and add however many headers you need: