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BulkSMS JSON REST API vs Tumblr

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

APIBulkSMS JSON REST APINEW—TumblrREACHABLE—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeyoauth
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredOAuth — some read routes may be public
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

BulkSMS JSON REST API vs Tumblr: common questions

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

On our scheduled checks, Tumblr leads on measured uptime — BulkSMS JSON REST API at —% versus Tumblr 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 Tumblr need an API key?

Both ask you to authenticate — BulkSMS JSON REST API uses an API key and Tumblr uses OAuth. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

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

Only Tumblr is browser-friendly — it returns CORS headers over HTTPS. BulkSMS JSON REST API needs a server-side call or proxy, so factor that into which one fits a front-end project.

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

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