Just found this works in safari:    spark://

If you add the Eurl bot (eurl@sparkbot.io) to the space and that will give you a URL that users can click to join

+1 for this feature. 

I'm writing a web form where employees can request access to spark.  Users will enter their email address which will kick off a some API calls to:1.) send spark invite, 2.) add them to the company team,3.) and initiate a 1-on-1 chat with a bot that h...