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Nager.Date vs The SMS Works API

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

APINager.DateHEALTHY100The SMS Works APIHEALTHY94
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms56518
P95 · ms5531101
AuthnoneapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree, no keyFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Nager.Date vs The SMS Works API: common questions

Which is more reliable, Nager.Date or The SMS Works API?

Both are neck-and-neck — Nager.Date and The SMS Works API 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, Nager.Date or The SMS Works API?

Nager.Date has the lower median latency in our checks — Nager.Date responds in 56 ms versus The SMS Works API at 518 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 Nager.Date and The SMS Works API need an API key?

Nager.Date needs no key, while The SMS Works API requires a free API key. If you want to start calling without signup, reach for Nager.Date first.

Can I call Nager.Date and The SMS Works API from the browser?

Yes — both Nager.Date and The SMS Works API 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 Nager.Date and The SMS Works API free for commercial use?

Nager.Date has unclear commercial terms, and The SMS Works API 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.