Ask HN: Lessons learned building an app / “super power“ market for your SaaS?

Hey HN, we’re an early project making an email platform for devs. Think Gmail with a recipes / addon / superpower market and APIs.

We’d like it to work like how Trello or Slack have enabled apps. I’d like to hear any lessons learned, best practices, shortcuts you’ve thought of to build such an addon marketplace!

One consideration is using self-hosted ifTTT clones like Huggin or Node Red and extended the recipes there, but maybe it’s just better to create a system from scratch and there are boilerplates out there.