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ONS vs Brazil

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

APIONSUNMONITORED—BrazilNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — no key (beta)
Rate limitUnpublishedFair use — no loops or full-range scanning
In directory since2026-07-052026-07-05
operationalpartialdownno data

ONS vs Brazil: common questions

Which is more reliable, ONS or Brazil?

Only Brazil is on our probe schedule so far (—% uptime over 90 days). The other is catalogued but not yet live-checked, so we can't compare measured reliability head-to-head — check the uncovered API's own status page for now.

Do ONS and Brazil need an API key?

Neither needs a paid key — ONS is callable with no signup, and Brazil is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call ONS and Brazil from the browser?

Yes — both ONS and Brazil send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are ONS and Brazil free for commercial use?

ONS has unclear commercial terms, and Brazil 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.