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BlockCypher vs Alpha (Mossland)

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

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

BlockCypher vs Alpha (Mossland): common questions

Which is more reliable, BlockCypher 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 BlockCypher and Alpha (Mossland) need an API key?

Neither needs a paid key — BlockCypher is callable with no signup, and Alpha (Mossland) is callable with no signup. Both are quick to prototype with; rate limits still apply.

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

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

BlockCypher 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.