Your code.
The customer's next message.

OTP delivery, order confirmations, and refusal checks for WhatsApp. Connect your backend and receive outcomes through signed webhooks.

Join the waitlist Read the quickstart

Start with
an OTP message.

Create a workspace API key, find your Sender ID, and choose an approved authentication template. Send a code your application generated.

The sample values are fictional. Keep the API key on your server and use a recipient you control. There is no sandbox or test-mode key; requests can send real messages.

Open the API reference
Send an OTPServer-side JavaScript
const response = await fetch(
  'https://api.watification.com/api/v1/otp/messages',
  {
    method: 'POST',
    headers: {
      Authorization: `Bearer ${process.env.WATIFICATION_API_KEY}`,
      'Content-Type': 'application/json',
      'Idempotency-Key': 'login-example-001',
    },
    body: JSON.stringify({
      to: '+15555550123',
      senderId: '11111111-1111-4111-8111-111111111111',
      template: { name: 'login_code', language: 'en' },
      code: '483920',
      reference: 'login-example-001',
    }),
  },
);
const result = await response.json();
if (!response.ok) throw new Error(JSON.stringify(result));

An accepted request returns 202 with status queued. Acceptance does not confirm delivery or verify the code.

OTP API

Send a code generated by your application using an approved Authentication template. Your application generates, expires, and verifies the code; Watification provides the message status.

OTP API guide

COD confirmations API

Request confirmation of a cash-on-delivery order. Customers can confirm, cancel, or change the delivery time on WhatsApp. Read the status or receive the outcome through webhooks.

COD API guide

Refusal checks

Ask whether a delivery was refused and collect the reason. Refusal checks have their own API operation and monthly allowance, separate from order confirmations.

Refusal-check requirements

Give each outcome
a way back to your application.

Signed webhooks

Receive signed HTTPS callbacks for message and COD outcomes. Verify signatures before accepting events. Send a test event, inspect delivery logs, and replay a delivery from the dashboard.

Webhook handling

Workspace API keys

Create keys under Developers > API keys. The complete key is shown once; store it on your server. Revoke a key when you need to remove access.

Authentication guide

Rate limits and errors

API keys have a request limit of 20 requests per second. Read the stable code in Problem Details, honor Retry-After for request-rate limits, and distinguish quota errors from short rate limits.

Rate limits and errors

Build with the
actual sending rules.

OTP templates require Authentication approval. COD templates require Utility approval and the required quick-reply buttons. Plan allowances and separate Meta message fees apply.

Read the developer quickstart