shipapis
StarSubmit an APISubmit API

Energy-Charts API vs Fixer API

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

APIEnergy-Charts APIHEALTHY83Fixer APIHEALTHY96
Uptime · 30d
Uptime · 90d97.2%99.44%
Uptime · 30d93.1%100%
P50 · ms716286
P95 · ms3072830
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

Energy-Charts API vs Fixer API: common questions

Which is more reliable, Energy-Charts API or Fixer API?

On our scheduled checks, Fixer API leads on measured uptime — Energy-Charts API at 97.2% versus Fixer API at 99.44% 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, Energy-Charts API or Fixer API?

Fixer API has the lower median latency in our checks — Energy-Charts API responds in 716 ms versus Fixer API at 286 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 Energy-Charts API and Fixer API need an API key?

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

Can I call Energy-Charts API and Fixer API from the browser?

Only Energy-Charts 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 Energy-Charts API and Fixer API free for commercial use?

Energy-Charts 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.