twilio-communications
Multi-channel communication platform: SMS, voice calls, WhatsApp, and 2FA verification.
- Covers SMS sending with E.164 validation, message segmentation awareness, and delivery callbacks; supports 80 messages per second default rate limit
- Twilio Verify service for OTP and 2FA across SMS, voice calls, email, and WhatsApp with built-in fraud prevention and rate limiting
- TwiML-based IVR systems using XML markup for voice menus, keypad/speech input gathering, call routing, and voicemail recording
- Includes request signature validation, credential management best practices, and session tracking patterns for stateless webhook architectures
Twilio Communications
Build communication features with Twilio: SMS messaging, voice calls, WhatsApp Business API, and user verification (2FA). Covers the full spectrum from simple notifications to complex IVR systems and multi-channel authentication. Critical focus on compliance, rate limits, and error handling.
Patterns
SMS Sending Pattern
Basic pattern for sending SMS messages with Twilio. Handles the fundamentals: phone number formatting, message delivery, and delivery status callbacks.
Key considerations:
- Phone numbers must be in E.164 format (+1234567890)
- Default rate limit: 80 messages per second (MPS)
- Messages over 160 characters are split (and cost more)
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