httpSMS vs US Street Address
Same instrument, two spec sheets — measured, not claimed.
httpSMS vs US Street Address: common questions
Which is more reliable, httpSMS or US Street Address?
Both are neck-and-neck — httpSMS and US Street Address each measure 0.0% 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.
Do httpSMS and US Street Address need an API key?
Both ask you to authenticate — httpSMS uses an API key and US Street Address 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 US Street Address from the browser?
Yes — both httpSMS and US Street Address 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 US Street Address free for commercial use?
httpSMS has unclear commercial terms, and US Street Address 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.