Built on Meta's Official Cloud API

WhatsApp infrastructure
for platforms

Let your customers connect their own WhatsApp Business accounts in 5 minutes. One setup link. No credentials shared. You handle the automation.

Start Building View API Docs
5 min
Customer onboarding
3B+
WhatsApp users reachable
99.9%
API uptime
Quick start
# Create a customer
$curl -X POST -H "X-API-Key: $KEY" \
  /api/v1/customers -d '{"name":"Acme Corp"}'
{"id":"a23d44f4...","api_key":"kap_8f7c..."}
# Generate a setup link
$curl -X POST /api/v1/customers/{id}/setup-links
{"url":"https://app.inbox360.com/setup/f7b2c..."}
# Send a message through their number
$curl -X POST /api/v1/whatsapp/{phone_id}/messages \
  -d '{"to":"+1234567890","type":"text","text":{"body":"Hello!"}}'
{"messages":[{"id":"wamid.HBgN..."}]} ✔ Delivered

Built for platforms that serve thousands of businesses

CRM PlatformsMarketing AgenciesE-commerce ToolsBooking SystemsSupport Software
How it Works

Three steps to WhatsApp

Your customers connect their own accounts. You control the automation. No credentials ever shared.

1

Create a customer

Register a customer via API. Inbox360 generates a unique API key and customer ID for complete credential isolation.

2

Share a setup link

Generate a branded onboarding URL. Customer clicks it, logs into Facebook, and connects their WhatsApp in ~5 minutes.

3

Send & receive messages

Use the customer's phone_number_id to send messages via our API proxy. Receive events via webhooks in real-time.

Features

Everything you need to ship WhatsApp

From onboarding to automation — a complete infrastructure layer built on the WhatsApp Cloud API.

🔒

One-Click WhatsApp Onboarding

Customers connect their WhatsApp Business account through a secure OAuth flow. They log in with Facebook, create a WABA, and verify their number — without ever sharing credentials with you. The backend handles token exchange and account setup automatically.

// What happens behind the scenes
1. Customer clicks setup link
2. FB.login() opens OAuth popup
3. Callback captures WABA & phone ID
4. Backend exchanges code → access token
5. Platform subscribes to account
6. Phone number registered
7. Webhook fires: phone_number.created

✔ Connection stored. Ready to message.
🔄

API Proxy

Send messages, manage templates, upload media — all through a single endpoint. We inject the stored access token and forward to the Cloud API.

📡

Reliable Webhooks

Message buffering, sequence ordering, HMAC-SHA256 signatures, automatic retries, and auto-pause at 85% failure rate.

🔗

Setup Links

Branded onboarding URLs with custom colors, language support, redirect URLs, and connection type selection. Expire after 30 days.

📣

Broadcasts

Send template messages to up to 1,000 recipients per batch. Track delivery, read receipts, and responses in real-time.

💬

Embeddable Inbox

Drop an iframe into your app. Scoped access tokens, real-time WebSocket updates, and dark/light theme support.

🤖

Workflow Engine

Visual builder with AI agent nodes, decision routing, function execution, wait states, handoff, and 2,700+ integrations.

Architecture

Two API layers, one platform

A Cloud API proxy for WhatsApp operations, plus a Platform API for multi-tenant management.

Your App
Frontend / Backend
→
Inbox360
Platform + Proxy API
→
Cloud API
WhatsApp Business Platform
→
WhatsApp
3B+ users

WhatsApp API Proxy

Mirrors the Cloud API at /whatsapp/v24.0/. Same endpoints, same schemas — we handle auth.

Platform API

Multi-tenant management at /platform/v1/. Customers, setup links, conversations, broadcasts, webhooks, workflows.

Credential Isolation

Each customer authenticates directly with the WhatsApp Business Platform. Access tokens are stored per-customer and injected at proxy time.

proxy-example.sh
# Your API call POST /api/v1/whatsapp/{phone_id}/messages X-API-Key: kap_8f7c... { "to": "+1234567890", "type": "text", "text": {"body": "Hello!"} } # We inject the stored token and forward: POST graph.facebook.com/v24.0/{phone_id}/messages Authorization: Bearer eyJhbG... → 200 OK ✔ Delivered
For Developers

APIs that respect your time

RESTful. Predictable. Well-documented. Ship in an afternoon.

📚

TypeScript SDK

Open source client with full type coverage. Works with or without the platform.

⌨

CLI

Manage numbers, send messages, create templates, configure webhooks — all from the terminal.

🔌

Webhooks v2

Buffered delivery, sequence ordering, idempotency keys, HMAC-SHA256 signatures, auto-pause.

⚡

Serverless Functions

Deploy JavaScript to the edge. KV storage, encrypted secrets, direct database access.

🧩

2,700+ Integrations

HubSpot, Slack, Sheets, Notion, Airtable, and thousands more. OAuth-based.

🔊

Voice Agents

Answer WhatsApp voice calls with AI. Real-time STT → LLM → TTS pipeline.

Pricing

Simple, transparent pricing

No per-message markup. WhatsApp conversation fees are billed directly to the business account.

Free
$0 / mo

Get started and test.

  • 2,000 messages/month
  • 1 connected number
  • 1 GB storage
  • Unlimited API calls
  • AI agents & workflows
Get Started Free
Pro
$25 / mo

For teams in production.

  • 100,000 messages/month
  • 3 numbers (+$10/ea)
  • 100 GB storage
  • 1,000 integration calls
  • Priority support
Start Pro Trial
Platform
Custom

Multi-tenant at scale.

  • 1M messages/month
  • 50 numbers (+$5/ea)
  • 1 TB storage
  • 10,000 integration calls
  • Dedicated SLA
Contact Sales

Ready to add WhatsApp
to your platform?

Join platforms using Inbox360 to connect their customers to WhatsApp in minutes, not months.

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