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Data.parliament.uk API vs Photon API

Same instrument, two spec sheets — measured, not claimed.

APIData.parliament.uk APIHEALTHY84Photon APIHEALTHY91
Uptime · 30d
Uptime · 90d92.2%99.02%
Uptime · 30d91.7%98.3%
P50 · ms678710
P95 · ms41641598
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Data.parliament.uk API vs Photon API: common questions

Which is more reliable, Data.parliament.uk API or Photon API?

On our scheduled checks, Photon API leads on measured uptime — Data.parliament.uk API at 92.2% versus Photon API at 99.02% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, Data.parliament.uk API or Photon API?

Data.parliament.uk API has the lower median latency in our checks — Data.parliament.uk API responds in 678 ms versus Photon API at 710 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do Data.parliament.uk API and Photon API need an API key?

Photon API needs no key, while Data.parliament.uk API requires a free API key. If you want to start calling without signup, reach for Photon API first.

Can I call Data.parliament.uk API and Photon API from the browser?

Yes — both Data.parliament.uk API and Photon API send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Data.parliament.uk API and Photon API free for commercial use?

Data.parliament.uk API has unclear commercial terms, and Photon API has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.