WaiverForever supports membership management systems such as Mindbody Online, Zendesk, Jackrabbit with a browser extension. This extension works on Google Chrome or Apple Safari.
You could go to "My Customer" page, click "Download Plugin" on the right top of the page.
WaiverForever Connect helps you automatically fill your client's information into your membership management of choice. No more manual typing into fields, everything is now handled by a push of a button.
However, the resource of extension is very limited. The better way is to use Zapier, it does integrate to Mindbody/Zendesk/Jackrabbit.