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Developers · API Lab

Public JSON API Lab

Enter a public HTTPS API URL. We fetch JSON under rate limits and SSRF protections so you can download a sample and design offline — including with external AI tools. Private networks are blocked.

HTTPS preferred. No localhost, private IPs, or cloud metadata endpoints.

Cyber-cage design notes

  • Anonymity / least data: Do not paste secrets, tokens, or personal data into third-party models.
  • Untrusted input: Treat fetched JSON as hostile until validated in your app.
  • RFBC (industry automation): Request → Filter → Bound → Confirm — validate schema, bound size/rate, confirm side-effects before actuation.
  • Rate limits: Lab endpoints are throttled to protect the platform and upstream APIs.