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SpaceTradersAPI vs TETR.IO

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

APISpaceTradersAPIHEALTHY68TETR.IOHEALTHY96
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms946357
P95 · ms1972906
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree, no API key
Rate limitRetry-After: 1sHonor server-provided cache expiry (~60s); docs require caching
In directory since2026-07-052026-07-05
operationalpartialdownno data

SpaceTradersAPI vs TETR.IO: common questions

Which is more reliable, SpaceTradersAPI or TETR.IO?

Both are neck-and-neck — SpaceTradersAPI and TETR.IO each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, SpaceTradersAPI or TETR.IO?

TETR.IO has the lower median latency in our checks — SpaceTradersAPI responds in 946 ms versus TETR.IO at 357 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 SpaceTradersAPI and TETR.IO need an API key?

TETR.IO needs no key, while SpaceTradersAPI requires a free API key. If you want to start calling without signup, reach for TETR.IO first.

Can I call SpaceTradersAPI and TETR.IO from the browser?

Yes — both SpaceTradersAPI and TETR.IO 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 SpaceTradersAPI and TETR.IO free for commercial use?

SpaceTradersAPI has unclear commercial terms, and TETR.IO 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.