twilio-communications

Topics in the source

• Twilio Communications
• Patterns
• SMS Sending Pattern
• Twilio Verify Pattern (2FA/OTP)
• TwiML IVR Pattern
• ⚠️ Sharp Edges

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) Carrier filtering can block messages (especially to US numbers) When to use: ['Sending notifications to users', 'Transactional messages (order confirmations, shipping)', 'Alerts and reminders'] Use Twilio Verify for phone number verification and 2FA. Handles code generation, delivery, rate limiting, and fraud prevention. Key benefits over DIY OTP: Twilio manages code generation and expiration Built-in fraud prevention (saved customers $82M+ blocking 747M attempts) Handles rate limiting automatically Multi-channel: SMS, Voice, Email, Push, WhatsApp Google found SMS 2FA blocks "100% of automated bots, 96% of bulk phishing attacks, and 76% of targeted attacks." When to use: ['User phone number verification at signup', 'Two-factor authentication (2FA)', 'Password reset verification', 'High-value transaction confirmation'] Build Interactive Voice Response (IVR) sys

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