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Data.parliament.uk API vs OWASP API Security Project

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

APIData.parliament.uk APIHEALTHY84OWASP API Security ProjectHEALTHY98
Uptime · 30d
Uptime · 90d92.2%100%
Uptime · 30d91.7%100%
P50 · ms678205
P95 · ms41641646
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 OWASP API Security Project: common questions

Which is more reliable, Data.parliament.uk API or OWASP API Security Project?

On our scheduled checks, OWASP API Security Project leads on measured uptime — Data.parliament.uk API at 92.2% versus OWASP API Security Project at 100% 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 OWASP API Security Project?

OWASP API Security Project has the lower median latency in our checks — Data.parliament.uk API responds in 678 ms versus OWASP API Security Project at 205 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 OWASP API Security Project need an API key?

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

Can I call Data.parliament.uk API and OWASP API Security Project from the browser?

Yes — both Data.parliament.uk API and OWASP API Security Project 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 OWASP API Security Project free for commercial use?

Data.parliament.uk API has unclear commercial terms, and OWASP API Security Project 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.