Currently we do not open up our API to other apps. We've found that it's usually not necessary to accomplish a workflow integration you are trying to achieve. For instance, with Doxy.me you are able to have a simple URL (https://doxy.me/example) that let's patient connect with doctors. That link can be added as a button or link within another app to start a Doxy.me call, without the need for getting messy with API access.
For more information about our integration options email firstname.lastname@example.org