2d ago: got RSVPs working on indie events eg tantek.com/2017/183/e1/sunday-yoga-presidio thanks to #IndieWeb building blocks, protocols, formats, services:
* brid.gy
* https://www.w3.org/TR/webmention
* webmention.io
* https://www.w3.org/TR/jf2
* stream.thatmustbe.us
No Javascript needed, just one iframe.
t