apifacts-pytest

A pytest plugin for the apifacts registry: when a test fails on an HTTP error from a registered API, the failure report gets a section with the verified facts about that error and their typed fixes. Zero tokens and zero requests until a test fails.

pip install apifacts-pytest      # loads automatically; or: pytest -p apifacts

──────────── Known facts (apifacts, CC BY 4.0) ────────────
POST api.stripe.com/v1/payment_intents → 400 idempotency_error
✅ verified:server:prod · Reusing an Idempotency-Key with a different request body returns HTTP 400 …
   fix: Send header Idempotency-Key = new UUID per distinct request
   https://apifacts.dev/stripe/idempotency-key-reuse-different-params

What it reads and sends

• Recognized exceptions anywhere in the chain (__cause__, __context__, exception groups): requests.HTTPError, httpx.HTTPStatusError, and SDK errors carrying status_code/http_status and request.url (OpenAI, Anthropic and similar clients).
• Nothing is sent unless the host is in the registry's service list (GET /v0/services, cached 24 h in ~/.cache/apifacts/). Then one POST /v0/check per distinct failure, 2 s timeout, at most 20 per session; none on a pass; the first network failure turns the plugin off for the session.
• Sent: method, scheme://host/path (no query, fragment, credentials or port; secret-looking path segments and tenant subdomains replaced), status, the first 2 KB of the error body with secrets, e-mail addresses, long ids and URL query strings removed, and the vendor SDK name and version. Never sent: request bodies, headers, cookies, tokens.
• Any plugin error is swallowed: it never changes a test outcome.

Configuration

Code MIT; facts CC BY 4.0.