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Crates.io vs ParlayAPI

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

APICrates.ioHEALTHY94ParlayAPIREACHABLE88
Uptime · 30d
Uptime · 90d100%87.5%
Uptime · 30d100%87.5%
P50 · ms279211
P95 · ms11541536
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified
Free tierFree — limits not published
Rate limitUnpublished
In directory since2026-07-052026-10-04
operationalpartialdownno data

Crates.io vs ParlayAPI: common questions

Which is more reliable, Crates.io or ParlayAPI?

On our scheduled checks, Crates.io leads on measured uptime — Crates.io at 100% versus ParlayAPI at 87.5% 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 ParlayAPI?

ParlayAPI has the lower median latency in our checks — Crates.io responds in 279 ms versus ParlayAPI at 211 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 ParlayAPI need an API key?

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

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

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

Are Crates.io and ParlayAPI free for commercial use?

Crates.io has unclear commercial terms, and ParlayAPI 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.