If you're looking for REST, JSON, and API's you're in the right place.
If you want simple automated billing, check out snapbill.com
We have a flexible signup system that lets you jumpstart a signup for one of your clients by providing the required details when redirecting. We also can redirect back to your site once your client has paid.
The Signup page has details.
It is possible to simply open our API in your browser... once you've signed up just go to https://api.snapbill.com. We're also working on a detailed reference for the entire api. Check our
Client documentation for an example.
This full website is available on github at https://github.com/snapbill/snapbill-dev. Feel free to issue a pull request, or simply send us an email if you notice any issues on this site.