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BulkSMS JSON REST API vs mail.tm

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

APIBulkSMS JSON REST APIDEAD0mail.tmHEALTHY82
Uptime · 30d
Uptime · 90d0.0%84.3%
Uptime · 30d0.0%75.0%
P50 · ms—709
P95 · ms—2351
AuthapiKeynone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — temporary mailboxes
Rate limitUnpublishedRate limited (429 on exceed); exact policy per docs.mail.tm
In directory since2026-07-052026-07-05
operationalpartialdownno data

BulkSMS JSON REST API vs mail.tm: common questions

Which is more reliable, BulkSMS JSON REST API or mail.tm?

On our scheduled checks, mail.tm leads on measured uptime — BulkSMS JSON REST API at 0.0% versus mail.tm at 84.3% 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 mail.tm need an API key?

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

Can I call BulkSMS JSON REST API and mail.tm from the browser?

Neither sends browser-friendly CORS headers reliably, so call BulkSMS JSON REST API and mail.tm 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 mail.tm free for commercial use?

BulkSMS JSON REST API has unclear commercial terms, and mail.tm 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.