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Twilio
Sends text messages and makes phone calls from your code.
1. Learn it
- Same shape as sending email: you call an API with a number and a message.
- You must buy a phone number first, and the rules differ by country — some need registration before you can send at all.
- SMS costs real money per message and gets read within minutes. Use it for urgent things only.
- People can reply. Decide where those replies go before you send the first one.
- Verification codes are the most common use — and a classic target for abuse, so rate-limit them hard.
Cost: Pay per message, plus a monthly fee for the number.
2. Practice it
Simulated — nothing real happensJustify the text message
Name one message your app would send by SMS instead of email, and say why the urgency earns the cost and the interruption.
3. Connect it
Real — your own account- 1Create a Twilio account; trial credit lets you send to your own verified number.
- 2Buy a number, then send one message to yourself from the console before writing any code.
- 3Keep the auth token server-side and set a spending alert.
MessyDev never signs you up, spends your money, or touches your accounts. You do that part.
4. Use it
Verification codes, urgent alerts, appointment reminders.
Honest alternatives
There is no single correct stack. Any of these would be a reasonable choice instead.
- Email via Resend
- Push notifications
- WhatsApp Business API
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