A team that sends one of these already knows how to send the others: the same authentication, error format, pagination and idempotency header across all of them.
Send one-time passcodes by SMS with automatic email fallback, from one API call. $0.01 per successful verification; a code that never arrives is free.
Send transactional SMS with a REST API that shows you which carrier carried each message and why. US segments from $0.0069; African rates published per country.
Send transactional email from your domain with DKIM set up for you and bounces handled automatically. $0.30 per 1,000; the first 3,000 a month are free.
Check whether a phone number is valid, which carrier it belongs to and whether it is reachable before you send. $0.004 per lookup.
A working test key in the sign-up response. No card, no sales call.
Create an account See every price