The question is how to solve this.
I was thinking about this, and maybe the following could work:
Let the community select and vote for the most desirable APIs/services to connect to and implement support for those.
Then, with time, add support for more APIs (just like Zapier, Piesync, Integromat and others do).
And finally, for all the other APIs, add a generic connector, so at least it will be possible to connect with services that don’t demand more specific setup.