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Fixer API vs GitHub Contribution Chart Generator

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

APIFixer APINEW—GitHub Contribution Chart GeneratorNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified (derived from public GitHub profile data)
Free tierFree tier — API key requiredFree — no key
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Fixer API vs GitHub Contribution Chart Generator: common questions

Which is more reliable, Fixer API or GitHub Contribution Chart Generator?

On our scheduled checks, GitHub Contribution Chart Generator leads on measured uptime — Fixer API at —% versus GitHub Contribution Chart Generator at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do Fixer API and GitHub Contribution Chart Generator need an API key?

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

Can I call Fixer API and GitHub Contribution Chart Generator from the browser?

Neither sends browser-friendly CORS headers reliably, so call Fixer API and GitHub Contribution Chart Generator from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are Fixer API and GitHub Contribution Chart Generator free for commercial use?

Fixer API has unclear commercial terms, and GitHub Contribution Chart Generator 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.