httpSMS vs Shotstack
Same instrument, two spec sheets — measured, not claimed.
httpSMS vs Shotstack: common questions
Which is more reliable, httpSMS or Shotstack?
On our scheduled checks, Shotstack leads on measured uptime — httpSMS at —% versus Shotstack 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 httpSMS and Shotstack need an API key?
Both ask you to authenticate — httpSMS uses an API key and Shotstack uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.
Can I call httpSMS and Shotstack from the browser?
Yes — both httpSMS and Shotstack 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 httpSMS and Shotstack free for commercial use?
httpSMS has unclear commercial terms, and Shotstack 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.