Two weeks ago we released the public API for Checkly. This post is about what parts we needed to refactor, what parts we added and how we handled generating API documentation.

This is a short follow up to last week's story on Stripe Billing as a reader on Hackernews commented that it seemed we didn't handle VAT. We do, but I just left it out of the story. For those not familiar with handling EU VAT for SaaS companies: It's a bit of counter intuitive jungle. At least that's what some dedicated SaaS startups make you believe. Also, Stripe does not handle it at all. They give you a { taxRate: null } field for you to fill.

When I started Checkly, all the typical SaaS things around billing, credit cards and prorating confused the hell out of me. I understood them from an intellectual point of view, but not really from an implementation point of view.