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BulkSMS JSON REST API vs Lobsters

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

APIBulkSMS JSON REST APINEW—LobstersNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnono
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

BulkSMS JSON REST API vs Lobsters: common questions

Which is more reliable, BulkSMS JSON REST API or Lobsters?

On our scheduled checks, Lobsters leads on measured uptime — BulkSMS JSON REST API at —% versus Lobsters at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do BulkSMS JSON REST API and Lobsters need an API key?

Lobsters needs no key, while BulkSMS JSON REST API requires a free API key. If you want to start calling without signup, reach for Lobsters first.

Can I call BulkSMS JSON REST API and Lobsters from the browser?

Neither sends browser-friendly CORS headers reliably, so call BulkSMS JSON REST API and Lobsters from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are BulkSMS JSON REST API and Lobsters free for commercial use?

BulkSMS JSON REST API has unclear commercial terms, and Lobsters 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.