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Data.parliament.uk API vs Fixer API

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

APIData.parliament.uk APIHEALTHY84Fixer APIHEALTHY93
Uptime · 30d
Uptime · 90d92.2%99.02%
Uptime · 30d91.7%98.3%
P50 · ms678448
P95 · ms4164830
AuthapiKeyapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

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

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

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

Fixer API has the lower median latency in our checks — Data.parliament.uk API responds in 678 ms versus Fixer API at 448 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 Fixer API need an API key?

Both ask you to authenticate — Data.parliament.uk API uses an API key and Fixer API uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

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

Only Data.parliament.uk API is browser-friendly — it returns CORS headers over HTTPS. Fixer API needs a server-side call or proxy, so factor that into which one fits a front-end project.

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

Data.parliament.uk API has unclear commercial terms, and Fixer 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.