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Sabre for Developers vs Transport for United States

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

APISabre for DevelopersHEALTHY94Transport for United StatesHEALTHY84
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms4491093
P95 · ms15311963
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedData copyright transit agencies / Umo IQ
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Sabre for Developers vs Transport for United States: common questions

Which is more reliable, Sabre for Developers or Transport for United States?

Both are neck-and-neck — Sabre for Developers and Transport for United States 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, Sabre for Developers or Transport for United States?

Sabre for Developers has the lower median latency in our checks — Sabre for Developers responds in 449 ms versus Transport for United States at 1093 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 Sabre for Developers and Transport for United States need an API key?

Transport for United States needs no key, while Sabre for Developers requires a free API key. If you want to start calling without signup, reach for Transport for United States first.

Can I call Sabre for Developers and Transport for United States from the browser?

Yes — both Sabre for Developers and Transport for United States 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 Sabre for Developers and Transport for United States free for commercial use?

Sabre for Developers has unclear commercial terms, and Transport for United States 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.