Twilio's Programmable Messaging REST API sends and receives SMS, MMS, WhatsApp, and RCS messages, manages media and messaging services, tracks delivery, and supports scheduling and regional data residency. Authentication uses HTTP Basic auth with an API key SID and secret. Pricing is pay as you go, with a free trial requiring no credit card.
Trust signals
Pricing
FREEMIUM
Auth
API_KEY
CORS
No
Rate limit
Throughput varies by sender, destination, channel, and account; excess messages may queue or return HTTP 429.
Health
164ms
Trust score
93 (A)
Excellent production-readiness signals.
Links
- Homepagewww.twilio.com/en-us/messaging
- Documentationwww.twilio.com/docs/messaging/api
- Base URLapi.twilio.com/2010-04-01
- OpenAPI specgithub.com/twilio/twilio-oai
Integration checklist
- Auth is API_KEY— no credit card required
- No CORS — route calls through your backend.
- Rate limit: Throughput varies by sender, destination, channel, and account; excess messages may queue or return HTTP 429.