shipapis
StarSubmit an APISubmit API

Blockchain vs OpenSea

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

APIBlockchainNEW—OpenSeaNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Blockchain vs OpenSea: common questions

Which is more reliable, Blockchain or OpenSea?

On our scheduled checks, OpenSea leads on measured uptime — Blockchain at —% versus OpenSea 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 Blockchain and OpenSea need an API key?

Both ask you to authenticate — Blockchain uses an API key and OpenSea uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call Blockchain and OpenSea from the browser?

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

Are Blockchain and OpenSea free for commercial use?

Blockchain has unclear commercial terms, and OpenSea 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.