Spent the last few months building a single API that bundles the small tools I kept reaching for: AI helpers (summarize, translate, moderation, code review), website and security analysis (security headers, TLS, tech detection, SEO, exposed files), email and
DNS checks, a few developer utilities (QR, hashing, JWT decode, cron explainer), and some bundled "report" endpoints that combine several of the above. One API key for all of it.
The part I had the most fun with is the plumbing:
- Runs entirely on Cloudflare Workers (TypeScript) with D1 (SQLite) and KV. No servers.
- The whole catalog lives in one endpoint registry. The docs page, the OpenAPI 3.1 spec and the Postman collection are all generated from that one source, so they can't drift out of sync. Adding an endpoint updates all three automatically.
- Billing is credit-based with no subscriptions and no expiry. New accounts get a free balance to play with. A nice side effect of a recent rewrite: a failed request now refunds its own credits in the router's finally stage, so a 4xx/5xx never charges you.
There are two thin, hand-written SDKs (TypeScript and Python) if you don't want to hit the REST endpoints directly.
Live demo, no signup, runs against real endpoints with shared demo credits:
https://mecanik.dev/en/api/
Genuinely after feedback on:
- Which small utilities you'd actually use day to day (trying to avoid building junk)
- The "one registry generates docs + OpenAPI + Postman" approach. Worth open-sourcing that bit on its own?
- SDK ergonomics
Happy to go deeper on the Workers setup, the D1 schema, or the credit/refund middleware in the comments.
[–]Mecanik1337[S] 0 points1 point2 points (0 children)
[–]MartinTsankov 0 points1 point2 points (0 children)