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Use case: notifications

Send WhatsApp notifications from your app

Order confirmations, shipping updates, status alerts and reminders, sent from your own number.

Start Your Free Trial See the code

No template approval · No per-message fees · Your own number

What you can send

The messages your customers actually wait for

Orders and shipping

Confirm the order, send the tracking link when it ships, say when it’s out for delivery.

Appointment reminders

A reminder the day before cuts no-shows, and the reply lands in your system by webhook.

Payments and invoices

Payment received, payment failed, or the invoice itself as a PDF attached to the message.

Monitoring alerts

Host down, disk full, job failed — straight to the phone of whoever is on call.

Checkmk plugin

Alerts to a team group

Post to a group instead of a person, so the whole team sees a new lead or a failed deploy.

Updates in a channel

Release notes, status updates or opening hours to everyone following your channel.

Sending login or verification codes? See the OTP page, with the limits that apply to codes.

Example

“Your order has shipped”

Call this from the place in your code where the order status changes. The message is plain text, so you write it exactly as you want it — no template, no placeholder syntax, no review.

Want to attach the invoice? The send-media action takes a PDF by URL with a caption. 

curl --request POST \
  --url https://waapi.app/api/v1/instances/123/client/action/send-message \
  --header 'authorization: Bearer your-api-token' \
  --header 'content-type: application/json' \
  --data '{
    "chatId": "[email protected]",
    "message": "Good news, Anna! Your order #1042 has shipped.\nTrack it here: https://example.com/track/1042"
}'
<?php

$instanceId = 123;
$apiToken = 'your-api-token';

$ch = curl_init("https://waapi.app/api/v1/instances/{$instanceId}/client/action/send-message");
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => [
        'authorization: Bearer ' . $apiToken,
        'content-type: application/json',
    ],
    CURLOPT_POSTFIELDS => json_encode([
        'chatId' => '[email protected]',
        'message' => 'Good news, Anna! Your order #1042 has shipped.
Track it here: https://example.com/track/1042',
    ]),
]);

echo curl_exec($ch);
import requests

instance_id = 123
api_token = "your-api-token"

response = requests.post(
    f"https://waapi.app/api/v1/instances/{instance_id}/client/action/send-message",
    headers={"authorization": f"Bearer {api_token}"},
    json={
        "chatId": "[email protected]",
        "message": "Good news, Anna! Your order #1042 has shipped.\nTrack it here: https://example.com/track/1042",
    },
)

print(response.json())
const instanceId = 123;
const apiToken = 'your-api-token';

fetch(`https://waapi.app/api/v1/instances/${instanceId}/client/action/send-message`, {
  method: 'POST',
  headers: {
    authorization: `Bearer ${apiToken}`,
    'content-type': 'application/json',
  },
  body: JSON.stringify({
    "chatId": "[email protected]",
    "message": "Good news, Anna! Your order #1042 has shipped.\nTrack it here: https://example.com/track/1042",
  }),
})
  .then((res) => res.json())
  .then(console.log);

Integrations

Trigger it from your stack

Not writing the HTTP call yourself? These send the same message.

Laravel

Send from an event listener or a queued job with the Laravel package.

n8n

Fire a message from any n8n workflow trigger, no code.

Zapier

Early access by invite, or Webhooks by Zapier today.

Checkmk

Open-source notification plugin for host and service alerts.

How it works

Four steps, one of them is your code

  1. 1

    Link your number

    Scan the QR code of a new instance with the phone that runs your business number.

  2. 2

    Copy your token

    Create an API token in your account and keep it with your other secrets.

  3. 3

    Call the API on an event

    Order paid, parcel shipped, server down: your system calls send-message.

  4. 4

    Get replies by webhook

    Answers and delivery updates are posted to your webhook URL as JSON.

Cost

A flat rate instead of a fee per notification

On Meta’s Cloud API

Each notification is a paid template message, priced by category and by the recipient’s country. Since 1 October 2026 replies inside the 24-hour window are billed too. More orders, more invoices.

As of October 2026. Source: Meta, pricing for non-template messages.

On WaAPI

$10 a month per connected number. The tenth notification costs the same as the ten-thousandth: nothing extra.

Where the break-even sits for your volume: per-message vs. flat-rate pricing, worked through.

Limits

Limits and sending safely

There is no cap on how many messages you send. What gets numbers restricted is contacting many people who never wrote to you — so send protection is on by default for every new number.

1–2 s
pause between two messages, per number
20
new conversations per hour, per number
60
new conversations per day, per number

Notifications to people you already talk to are not new conversations: a customer who has written to your number, or whom you messaged in the last 7 days, doesn’t count. The first message to someone who never wrote to you does.

What counts as a new conversation: a person who has never written to your number and whom you have not messaged in the last 7 days. Replies to people who wrote to you first and messages to groups and channels never count, and a follow-up within those 7 days doesn’t count twice.

Need more? Spread new contacts across several numbers, or switch send protection off for a number after confirming the warning — at your own risk.

How to avoid restrictions

Your first instance is free
One instance, free for your first month — with code FREEINSTANCE, entered at checkout.
Flat rate

Flat rate, simple

$10 / month, per connected number

Unlimited messages. Media, groups, channels, SDKs and MCP included. Cancel anytime.

  • No per-message fees
  • No per-user fees
  • No setup fee
  • Cancel anytime
Start Your Free Trial See full pricing

See why our customers are excited

Trusted by developers worldwide to elevate their apps

Overall we are very happy with the reliability and general service.

Dan M.

Dan M.

CTO

Good and affordable. Uptime is good compared to similar services.

Ranjid E.

Ranjid E.

CEO

Great tool to send marketing campaigns, would recommend for anyone in need of a reliable service.

Daniel M.

Daniel M.

Senior Backend Developer

Notification FAQ

Templates, consent, cost and replies.

No. You send plain messages with the text you choose, from the first day. There are no message templates to submit and wait for.

Yes, but each one counts as a new conversation, and send protection allows 60 of those a day per number by default. Only message people who asked for it — an opt-in at checkout is the usual way.

Nothing on top of the subscription. You pay a flat monthly price per connected number, however many notifications you send.

Yes. Use the group’s id (ending in @g.us) as the chat id. Messages to groups and channels never count as new conversations.

Through your webhook. Incoming replies arrive as JSON, and so do the delivery and read updates of the messages you sent.

Your own business or personal number — the one you linked to the instance.

Send the first notification today

3-day free trial · No credit card · Cancel anytime.

Start Your Free Trial How the API call works