Bring your existing OpenAPI or Postman collection. We score it for LLM-readability, suggest concrete rewrites, and auto-generate the artifacts agents need — llms.txt, an optimized OpenAPI, and a signed Mycelio manifest.
Not a Postman or Swagger replacement. The wedge is narrow: making your API legible to LLMs. Everything else (request execution, mocks, environments, team workflows) is what Postman is for.
Everything above runs client-side. Your spec never leaves your browser unless you explicitly click "Run hosted review" (and even then it's the spec only, not your traffic).
Paste an OpenAPI URL, upload an OpenAPI/Postman file, or build a collection from scratch. Parsing happens in your browser.
Each endpoint gets an agent-readiness score, token cost, per-LLM success rate, and concrete rewrite suggestions. 3 reviews/day free.
One click emits llms.txt, an optimized OpenAPI with the rewrites applied, and a signed Mycelio manifest you can publish.
Friction-free trial. Pay only when you outgrow the free tier.
| Tier | What you get | Price |
|---|---|---|
| Anonymous | 3 hosted reviews/day per IP · local CLI unlimited | free |
| Logged-in (Prowl account) | 10 hosted reviews/day · saves your history | free |
| Paid (x402 / $PROWL) | Unlimited · live tests against your URL | $0.02 review · $0.05 live |
The only thing costing real money on our side is cloud LLM inference, so that's the only thing we charge for. Artifact generation (llms.txt, OpenAPI, Mycelio manifest), publishing, and re-publishing are free at all tiers.
v0. What works today:
llms.txt + optimized OpenAPI for the current collectionprowl-bench design manifest stripe.json emits a real, signable Mycelio manifestWhat's still mock until backend lands:
/v1/endpoint/review + free-tier middleware is in build