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Crates.io vs ddownload

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

APICrates.ioHEALTHY90ddownloadREACHABLE100
Uptime · 30d
Uptime · 90d99.02%100%
Uptime · 30d100%100%
P50 · ms458365
P95 · ms1317792
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

Crates.io vs ddownload: common questions

Which is more reliable, Crates.io or ddownload?

On our scheduled checks, ddownload leads on measured uptime — Crates.io at 99.02% versus ddownload 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, Crates.io or ddownload?

ddownload has the lower median latency in our checks — Crates.io responds in 458 ms versus ddownload at 365 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 Crates.io and ddownload need an API key?

Crates.io needs no key, while ddownload requires a free API key. If you want to start calling without signup, reach for Crates.io first.

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

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

Are Crates.io and ddownload free for commercial use?

Crates.io has unclear commercial terms, and ddownload 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.