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Datasette vs Fixer API

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

APIDatasetteHEALTHY97Fixer APIHEALTHY93
Uptime · 30d
Uptime · 90d100%99.02%
Uptime · 30d100%98.3%
P50 · ms293448
P95 · ms892830
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Datasette vs Fixer API: common questions

Which is more reliable, Datasette or Fixer API?

On our scheduled checks, Datasette leads on measured uptime — Datasette at 100% 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, Datasette or Fixer API?

Datasette has the lower median latency in our checks — Datasette responds in 293 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 Datasette and Fixer API need an API key?

Datasette needs no key, while Fixer API requires a free API key. If you want to start calling without signup, reach for Datasette first.

Can I call Datasette and Fixer API from the browser?

Only Datasette 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 Datasette and Fixer API free for commercial use?

Datasette 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.