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Crates.io vs DummyJSON

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

APICrates.ioNEW—DummyJSONNEW—
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
Rate limitUnpublished100 req/window · 99 remaining · resets 1783510243
In directory since2026-07-052026-07-05
operationalpartialdownno data

Crates.io vs DummyJSON: common questions

Which is more reliable, Crates.io or DummyJSON?

On our scheduled checks, DummyJSON leads on measured uptime — Crates.io at —% versus DummyJSON 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 Crates.io and DummyJSON need an API key?

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

Can I call Crates.io and DummyJSON from the browser?

Yes — both Crates.io and DummyJSON 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 Crates.io and DummyJSON free for commercial use?

Crates.io has unclear commercial terms, and DummyJSON 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.