Satoshipay[0] has been around for a long time (and many iterations) and is now based on Stellar and from what I've seen pretty simple to integrate for websites.

Satoshipay[0] has been around for a long time (and many iterations) and is now based on Stellar and from what I've seen pretty simple to integrate for websites. [0]: https://satoshipay.io https://satoshipay.io