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OpenSea vs Alpha (Mossland)

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

APIOpenSeaUNMONITORED—Alpha (Mossland)NEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

OpenSea vs Alpha (Mossland): common questions

Which is more reliable, OpenSea or Alpha (Mossland)?

Only Alpha (Mossland) 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 OpenSea and Alpha (Mossland) need an API key?

Alpha (Mossland) needs no key, while OpenSea requires a free API key. If you want to start calling without signup, reach for Alpha (Mossland) first.

Can I call OpenSea and Alpha (Mossland) from the browser?

Yes — both OpenSea and Alpha (Mossland) 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 OpenSea and Alpha (Mossland) free for commercial use?

OpenSea has unclear commercial terms, and Alpha (Mossland) 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.