Your numbers, isolated
Keep each WhatsApp number in its own session, with independent credentials and connection state.
A DIRECT CONNECTION TO YOUR CUSTOMERS
WhatsApp API.
Built for what
you build.
Build a WhatsApp REST API integration around your existing number. Connect it by QR code, send messages from your backend, and receive signed webhook events.
✓No card required✓7-day trial✓No per-message fees
YOUR WORKSPACE · PRODUCT PREVIEW
WhatsApp sessions+ New session
CS
Customer supportOne isolated session, ready for your application
connected Isolated sessions Your app → WhatsApp
REST API Node.js Python PHP / LaravelAny HTTP client
EVERY CONNECTION, UNDER CONTROL
A small API. A lot of possibility.
Build notifications, customer conversations, and automated workflows with the tools your application already uses.
Messages that do more
Send text, images, video, audio, documents, contact cards, locations, replies, reactions, and polls.
Events in real time
Receive incoming messages and session events through signed webhooks, with retries and delivery history.
Access on your terms
Issue scoped account tokens or keys tied to a single session. Revoke credentials whenever you need.
See what happens
Inspect session events, message activity, connection state, and payment history from your workspace.
Delivery with care
Send immediately, then use your application’s jobs for scheduling, pacing, and retries.
EXPLORE THE EXISTING API GUIDES
WhatsApp API integration guides for your stack.
Learn how to send WhatsApp messages through a REST API, manage QR-linked sessions and verify webhooks. Start with the existing documentation, then follow source-tested Node.js and Laravel tutorials.
WhatsApp REST API quickstart
Authenticate with a session-bound key and send your first message from your backend.
Read the documentationQR code and connected sessions
Link an existing WhatsApp account, inspect QR pairing, and manage isolated session states.
Read the documentationSend text and media
Read payload examples and understand transport acceptance versus recipient delivery.
Read the documentationSigned webhooks and events
Receive session and message events and validate the callback HMAC signature.
Read the documentationDirect sending and retries
Understand immediate dispatch and implement scheduling, pacing and send retries in your own app.
Read the documentationRelayWA connects through WhatsApp Web-based sessions, not Meta's official WhatsApp Cloud API. Sending and account availability remain subject to WhatsApp platform conditions.
YOUR NEXT INTEGRATION STARTS HERE
A few lines of code.
A new connection.
Bring WhatsApp into your application with a straightforward HTTP request.
STEP 01
Link your number
Scan the QR from WhatsApp’s Linked devices.
STEP 02
Copy your session key
Keep credentials scoped to a single number.
STEP 03
Send your first request
Use your language. Receive replies through webhooks.
send-message.js
const response = await fetch( "https://relaywa.com/api/send-message", { method: "POST", headers: { Authorization: "Bearer YOUR_SESSION_KEY", "Content-Type": "application/json" }, body: JSON.stringify({ to: "12025550123", text: "Your order is on its way." }) });if (!response.ok) throw new Error('HTTP ' + response.status);const result = await response.json();YOUR STACK, YOUR CHOICE
Built to fit the tools
you already use.
A standard HTTP API works across languages. Keep your application architecture and add WhatsApp where it belongs.
Node.js
Use fetch in your Node.js service, then route incoming events to your application.
Explore HTTP integrationPython
Connect with requests or your preferred HTTP client. Build background jobs and event handlers.
Explore HTTP integrationLaravel
Use Laravel’s HTTP client and queues to send notifications from your existing application.
Explore HTTP integrationn8n
Configure a standard HTTP Request node. This is a manual recipe, not an official packaged RelayWA node.
Explore HTTP integrationHTTP integration examples · published RelayWa SDK packages are not required.
HOW IT WORKS
One number.
Three simple steps.
From your WhatsApp number to your first API message. A straightforward setup that fits your application.
- STEP 01
Connect your number
Create a session and scan the QR code from WhatsApp’s Linked devices.
Your number, linked securely - STEP 02
Copy your API key
Your session key is created automatically after connection. Copy it to your application server.
One key for each session - STEP 03
Send your first message
Send messages through the API and receive customer replies through signed webhooks.
Messages out. Replies in.
MAKE IT PART OF YOUR PRODUCT
Useful connections.
Everyday possibilities.
Your application decides what happens. RelayWa provides the messaging connection.
Order & delivery updates
Connect your order workflow to confirmations, dispatch updates and collection messages.
Appointment reminders
Send timely reminders and bring confirmations back into your scheduling system.
Customer support
Route incoming conversations to your support platform and respond from your own tools.
AI-assisted conversations
Connect webhook events to your assistant, with your own review and escalation rules.
CRM workflows
Keep messaging activity alongside your existing contacts and customer records.
Operations & reporting
Use message and session events to build the reporting your team needs.
THE DETAILS THAT KEEP YOU IN CONTROL
Every session has
its own boundaries.
Independent connection state and session credentials let you keep each number’s integration separate. Account tokens manage only the scopes you choose.
Understand the APIIsolated sessions
Inspect and operate individual numbers without sharing their credentials.
Scoped access
Use session keys for messaging and account tokens for management. Revoke access when needed.
Signed event delivery
Verify webhook signatures, handle retries and connect events to your own workflows.
A SIMPLE PLAN FOR EVERY STAGE
Your numbers. Predictable pricing.
Compare WhatsApp API costs across RelayWA's monthly and annual subscription plans for QR-linked sessions. The plan cards show current prices and connected-number allowances; your application controls scheduling, pacing and send retries. WhatsApp platform conditions still apply.
Loading plans…
Try one number for 7 days. No payment card needed. Explore QR session setup or read how sending works before choosing a plan.
GOOD QUESTIONS, STRAIGHT ANSWERS
Before you start building.
How do I connect my WhatsApp number?
Create a session in your workspace. Open WhatsApp on your phone, select Linked devices, and scan the QR code. Once connected, create a session API key and test your first request.
Can I connect more than one number?
Yes. Each number has its own isolated session and API credentials. Your subscription determines how many numbers you can connect.
How do I receive incoming messages?
Add an HTTPS webhook endpoint to your workspace. RelayWA delivers message and session events to your application, with retries when delivery fails.
Does RelayWA charge for every message?
Paid plans use subscription pricing based on connected numbers. There is no per-message fee or monthly message cap. Your application controls sending cadence and retries.
What happens when a session disconnects?
Open the session page to inspect its status and logs. RelayWA’s worker handles recoverable connection interruptions. A logged-out account requires a fresh QR scan.
Can I test before subscribing?
New workspaces receive a 7-day trial with one number and 50 messages per day. You can test linking, API requests, and webhook integration before choosing a paid plan.
Is RelayWA the official Meta WhatsApp Cloud API?
No. RelayWA connects existing WhatsApp accounts using QR-linked WhatsApp Web sessions. It is not the official Meta WhatsApp Cloud API or a Meta business solution provider. Review WhatsApp account policies and integration risks before production use.
Does RelayWA queue or automatically retry outbound sends?
No. Outbound messages are sent directly to the connected session. Your application should handle schedules, pacing and bounded retries using a stable clientMessageId to avoid accidental duplicate sends.
YOUR NEXT CONNECTION STARTS HERE
From your code to their WhatsApp.
Connect a number and make your first request today.
Start your free trial© 2026 RelayWA. Built for developers, by developers.