How to Send SMS from Node.js

A modern Node.js runtime has fetch built in, so sending an SMS needs no extra dependency.

const response = await fetch("https://your-domain.example/api/v1/messages", {
  method: "POST",
  headers: {
    "Authorization": "Bearer swl_live_YOUR_API_KEY",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    recipient: "255700000000",
    sender_id: "YOURBRAND",
    body: "Your order has shipped.",
  }),
});

const data = await response.json();
console.log(data);

The API key is a Bearer token created from your account. Keep it in an environment variable rather than committing it to source control.

See SMS API Tanzania for the full endpoint reference.