Now in public beta

The WhatsApp API
built for developers

Send messages, receive real-time webhooks, manage media — all through a clean REST API. Ship WhatsApp integrations in minutes, not weeks.

Send a message
POST /v1/instances/:id/messages
{ 
  "chat_id": "5511999999999@s.whatsapp.net",
  "type": "text",
  "content": { "text": "Hello from Wataki!" }
}

Features

Everything you need to build on WhatsApp

A complete API that handles the complexity of WhatsApp so you can focus on your product.

Messages in milliseconds

Send text, images, documents, and more through a single endpoint. Receive delivery receipts in real time.

Real-time webhooks

Get instant notifications for incoming messages, status updates, and connection events. Retry logic built in.

Multi-tenant by design

API key authentication, per-tenant rate limiting, and instance isolation. Built for SaaS from day one.

Media handling

Upload and send images, audio, video, and documents. Automatic MIME detection and secure file storage.

Group management

Create groups, manage participants, update settings — all programmatically through the API.

Observability built in

Monitor message delivery, webhook success rates, API usage, and instance health from a single dashboard.

Developer experience

Five lines to your first message

No SDKs required. Any language that speaks HTTP works. Create an instance, scan the QR code, and start sending.

RESTful API with consistent, predictable patterns
OpenAPI 3.1 spec for auto-generated SDKs
Idempotency keys for safe retries
Cursor-based pagination for large datasets
example.sh
# Create an instance
curl -X POST api.wataki.cloud/v1/instances \
-H "X-API-Key: wk_live_..." \
-d '{"name": "my-bot"}'
# Scan QR → connected
# Send a message
curl -X POST api.wataki.cloud/v1/instances/:id/messages \
-H "X-API-Key: wk_live_..." \
-d '{"chat_id":"5511...@s.whatsapp.net",
"type":"text",
"content":{"text":"Hello!"}}'
# → 202 Accepted

Pricing

Start free, scale as you grow

No credit card required. Upgrade when you're ready.

Free

Perfect for prototyping and side projects.

$0forever
  • 100 messages / month
  • 1 WhatsApp instance
  • Webhook delivery
  • Community support
Start free
Most popular

Growth

For startups and growing products.

$29/month
  • 5,000 messages / month
  • 5 WhatsApp instances
  • Webhook delivery with retries
  • Observability dashboard
  • Priority support
Start with Growth

Scale

For teams running production workloads.

$99/month
  • 25,000 messages / month
  • 25 WhatsApp instances
  • Webhook delivery with retries
  • Observability dashboard
  • Dedicated support
  • Custom rate limits
Start with Scale

Ready to build?

Get your API key in 30 seconds. No credit card, no meetings, no friction.