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Free API Today

Free open government data APIs

3 of 3 returned the expected data at the last check, all without a key. Public records published by governments: policing, transport and federal rules.

3 APIs · no key · HTTPS

Build snapshot, not live. One verifier run on , from the machine that built this site. How we check

  • data.police.ukWorking

    Street-level crime, outcomes and police forces in England, Wales and Northern Ireland.

    data.police.ukRuns in the browser729 msup 1 of 1 day

  • Transport for London Unified APIWorking

    Line status, arrivals, stop points and journey planning for London transport.

    api.tfl.gov.ukRuns in the browser201 msup 1 of 1 day

  • Federal RegisterWorking

    US federal rules, proposed rules and notices.

    www.federalregister.govRuns in the browser485 msup 1 of 1 day

Before you pick one

Government APIs change slowly but go offline for maintenance without notice. Read the status history before you depend on one.

Open an API’s page to see the exact request we send, the answer it gave, and how many of the last 30 days it was up. If it is marked CORS you can run the request from the page itself.

Questions

Which free open government data APIs need no key?

All 3 listed here: data.police.uk, Transport for London Unified API, Federal Register. Each answered our verifier without a key or account.

Which open government data APIs can I call from the browser?

In the Oct 3, 2026 run, 3 of 3 sent CORS headers: data.police.uk, Transport for London Unified API, Federal Register.

Which one answered fastest?

Transport for London Unified API, in 201 ms, in the Oct 3, 2026 run from our build machine. Latency depends on where you call from, so treat it as a rough guide.

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