I posted an example Send to Cardhop action, if anyone is playing with Flexibits’ nifty new contacts app, Cardhop. They have support for a number of other url schemes.
The initial release seems to have a few glitches with some of the x-callback-url versions, but I’m sure they’ll work those out in a update quickly.
If you like Fantastical’s natural language parsing for events, and/or miss my retired app Interact for contact parsing, this looks like a good option.