csmatt is right in saying there's a lot in this space but also a lot missing from existing things. Mockup tools would be cool, indeed. In fact, making some way

csmatt is right in saying there's a lot in this space but also a lot missing from existing things. Mockup tools would be cool, indeed. In fact, making some way for API owners to create mockup tools for their APIs might be an interesting niche. On a side note, good luck to you with your plan. It's brave of you to quit your job for the purposes of building stuff. Admirable :)