> ## Documentation Index
> Fetch the complete documentation index at: https://docs.karflows.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Node.js

> Use KarFlows APIs from Node.js.

## Unified message

```js theme={null}
const baseUrl = process.env.KARFLOWS_BASE_URL || "https://your-karflows-domain.com";

const response = await fetch(`${baseUrl}/api/omni/send`, {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.KARFLOWS_UNIFIED_TOKEN}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    to: "+255700000000",
    text: "Your order has been received.",
    channels: ["whatsapp_qr", "sms"],
    deliveryMode: "fallback",
    whatsappFrom: "447405993704",
    sender: "APPROVED",
  }),
});

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

## OTP flow

```js theme={null}
async function sendOtp(to) {
  const baseUrl = process.env.KARFLOWS_BASE_URL || "https://your-karflows-domain.com";
  const res = await fetch(`${baseUrl}/api/omni/otp/send`, {
    method: "POST",
    headers: {
      Authorization: `Bearer ${process.env.KARFLOWS_UNIFIED_TOKEN}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({ to, channels: ["whatsapp_qr", "sms"] }),
  });
  return res.json();
}

async function verifyOtp(pinId, pin) {
  const baseUrl = process.env.KARFLOWS_BASE_URL || "https://your-karflows-domain.com";
  const res = await fetch(`${baseUrl}/api/omni/otp/verify`, {
    method: "POST",
    headers: {
      Authorization: `Bearer ${process.env.KARFLOWS_UNIFIED_TOKEN}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({ pinId, pin }),
  });
  return res.json();
}
```