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Developer-first messaging infrastructure

Build Scalable Messaging With a Developer-First WhatsApp API

Ship production-ready integrations with REST endpoints, webhooks, and session control. Chattu is built for teams that need reliable messaging infrastructure, not just basic automation.

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API Calls/Day
0
% Uptime
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Active Integrations
  • 5,000+ production integrations
  • 4.8/5 stick after trial
  • Deploy API in minutes
  • Rate limits & session reliability

How It Works

Three technical steps to ship your integration.

Provision session

Create and authenticate sessions via dashboard or API-managed flows.

Integrate REST endpoints

Send outbound messages and orchestrate workflows from your backend.

Consume webhooks at scale

Process delivery, incoming, and status events in real time with retries.

Inside the product

QR, templates, and status — laid out the way you’ll actually use them.

Scan to connect

Your QR appears right after sign-in — no waiting, no confusion.

Template builder

Hi {{name}}, your order is ready for pickup!

Variables, preview, send — your team speaks in one voice.

Inbox & status

Connected
Chats
Session · Main line
Connected
Search chats
All Unread
New lead · WhatsApp 10:38
Thanks! When can we talk?
Support queue Yesterday
We’ll ship it tomorrow morning.
Campaign · Blast Mon
Opened: 842 · Replied: 61

Connection state stays visible so you’re never guessing.

Core API capabilities

Infrastructure primitives for scalable messaging products.

REST API

Programmatic send, template, and session operations with predictable endpoints.

Webhooks

Receive delivery and inbound events to drive workflows and data pipelines.

Session control

Control lifecycle, health, and routing for each messaging instance.

Automation via code

Build your own orchestration logic instead of relying on rigid automation builders.

Scalable integration

Connect CRM, billing, support, and product systems through one API platform.

Developer proof, not promises

Direct API usage patterns your team can plug into production messaging pipelines.

Open API Documentation

cURL request

POST /api/v1/messages/send 
curl -X POST https://api.chattu.cloud/v1/messages/send \
  -H "Authorization: Bearer CHATTU_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "sessionId": "session_prod_eu_01",
    "to": "+15551234567",
    "type": "text",
    "message": "Your verification code is 834921"
  }'

JavaScript integration

Node.js 
const response = await fetch("https://api.chattu.cloud/v1/messages/send", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.CHATTU_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    sessionId: "session_prod_eu_01",
    to: "+15551234567",
    type: "template",
    templateId: "order_confirmed_v2",
    variables: { orderId: "ORD-3921" }
  }),
});

Built for teams shipping integrations

Operational reliability for production messaging workloads.

Webhook retries and idempotency removed message drift between our app and CRM. We now trust delivery states in production.
— Lead engineer, SaaS platform
Session-level controls and API rate limits made scaling to millions of monthly calls straightforward for our backend team.
— Staff engineer, fintech
  • Session isolation & health checks
  • Webhook delivery with retries
  • API-first architecture for custom workflows

Choose your API plan

Scale by API calls, rate limits, and active messaging sessions

Free Trial

7-Day Free Trial

₪ 0 /7 days

Try all features for 7 days

  • 1,000 API calls
  • 1 session instance
  • 25 req/min rate limit
  • Webhook delivery events
  • Basic API support
  • 7 days request logs
  • API access
Start Free Trial

Starter

₪ 50 /month

Perfect for small businesses & individuals

  • 50,000 API calls/month
  • 2 session instances
  • 120 req/min rate limit
  • 30 days event retention
  • 30 days request logs
  • API access
Get Started
Most Popular

Professional

₪ 150 /month

Scale your marketing with advanced features

  • 250,000 API calls/month
  • 5 session instances
  • Unlimited req/min bursts
  • API Access (250K req/month)
  • Webhook integration
Get Started

Enterprise

₪ 250 /month

Custom solutions for large-scale operations

  • Unlimited API calls/month
  • Unlimited session instances
  • 24/7 Dedicated Support
  • API Access (Unlimited)
Contact Sales

All plans include API onboarding, docs access, and webhook support. Cancel anytime.

Build on Chattu API

Launch scalable messaging integrations with reliable infrastructure.

Get API Access View API Docs

REST API • Webhooks • Session infrastructure