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Fixer vs Yahoo Finance Chart

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

APIFixerHEALTHY92Yahoo Finance ChartHEALTHY99
Uptime · 30d
Uptime · 90d99.02%100%
Uptime · 30d98.3%100%
P50 · ms481167
P95 · ms4584407
AuthapiKeynone
CORSyesno
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

Fixer vs Yahoo Finance Chart: common questions

Which is more reliable, Fixer or Yahoo Finance Chart?

On our scheduled checks, Yahoo Finance Chart leads on measured uptime — Fixer at 99.02% versus Yahoo Finance Chart 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, Fixer or Yahoo Finance Chart?

Yahoo Finance Chart has the lower median latency in our checks — Fixer responds in 481 ms versus Yahoo Finance Chart at 167 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 Fixer and Yahoo Finance Chart need an API key?

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

Can I call Fixer and Yahoo Finance Chart from the browser?

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

Are Fixer and Yahoo Finance Chart free for commercial use?

Fixer has unclear commercial terms, and Yahoo Finance Chart 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.