THE WHATSAPP API TO CONNECT YOUR PRODUCT

Your product.
More connected.

Bring WhatsApp into your SaaS, CRM or automation. One API to send messages, receive events and take your operation further.

Start integrating Explore the docs

Open documentation. Your stack. Your possibilities.

Flow visualizationREST / WEBHOOKS

Your systemOrder confirmedPOST /message/send-text

Message on WhatsApp12:41

Your order is on its way. ✨

messages.updateEvent received in your app

One connection. Endless possibilities.

Native Go · REST · Webhooks↓

01 / INTEGRATE WITH HELP FROM YOUR AI

Designed for your AI to understand. Ready for you to integrate.

OpenAPI, open documentation and code examples give Claude, Gemini and ChatGPT context to help write your integration. Describe what you need, review the code and connect WhatsApp to your product.

Structured OpenAPI
Code examples
Copyable prompt

01
Describe what you want to build
A SaaS, an order confirmation or a support workflow. Start with the problem your app solves.
02
Give your assistant context
Share the documentation and OpenAPI. They describe Muapi’s endpoints, fields and authentication.
03
Review. Test. Connect.
Check the generated code, keep credentials in your backend and test with your own number before publishing.

Explore the API

Give your assistant the context

Claude
Gemini
ChatGPT

A starting point for your idea

I want to add WhatsApp notifications to my app. Use Muapi’s documentation and help me build the integration in my stack.

View full prompt

I want to integrate WhatsApp into my app using Muapi.

Documentation: https://muapi.com.br/documentacao?lang=en
OpenAPI: https://muapi.com.br/docs/api-docs.en.json

Before generating code, ask about my stack and the workflow I want to implement. Read the references; if you cannot access them, ask me for the relevant excerpts. Do not invent endpoints or fields.

Start with a backend integration for POST /api/{instance}/message/send-text, using api-key in the header and chatId and text in the JSON body. Use only placeholders for the instance and token, loaded from environment variables. Never ask for credentials in the chat or expose them in the frontend.

Explain the code and error handling. Show how to test with my own number, but do not send messages or make changes without my confirmation.

This button only copies text. It does not connect accounts or send messages. Never include tokens or customer data in the prompt.

AI helps build the integration. Your app uses the Muapi REST API — with or without an assistant.

Claude, Gemini and ChatGPT are trademarks of their respective owners. Identifying these assistants does not imply a partnership with or endorsement of Muapi.

FITS YOUR STACK. EXPANDS WHAT IT CAN DO.

n8nMakenode.jsPythonphpGO

Integration via HTTP and webhooks. Examples use REST requests without relying on native connectors.

02 / THE PLATFORM

Your next product feature already has its infrastructure.

From the first message to managing multiple numbers, get the building blocks for your customer experience.

Every number. Its own space.

Isolated sessions and separate resources per instance help reduce the impact of failures across numbers. More control for operations serving multiple clients.

Make every format count.

Text, images, documents, polls and voice notes. Choose the format that makes sense for each moment.

Keep your app in the loop.

Receive events via webhooks, configure filters and track deliveries and retry attempts.

03 / FROM CODE TO YOUR FIRST MESSAGE

A few lines. New possibilities.

One HTTP request connects what your product does to the conversation your customer receives. Start with an example and explore the API at your own pace.

01
Create your instance
With an enabled account, create an instance through the dashboard or API.
02
Connect WhatsApp
Scan the QR code or use the pairing code on your phone.
03
Send. Receive. Build.
Use the instance token to send messages and configure your webhook to receive events.

Open the getting started guide

Build with AI

Your first message

curl --request POST \
  'https://muapi.com.br/api/INSTANCE/message/send-text' \
  --header 'api-key: INSTANCE_TOKEN' \
  --header 'Content-Type: application/json' \
  --data '{
    "chatId": "5511999999999",
    "text": "Hello! Your order has been confirmed."
}'

Authentication via the api-key header

A real request example. Replace the instance and token with your credentials. This page does not send messages.

04 / BUILT FOR YOUR USE CASE

The technology behind a good conversation.

SAAS & SOFTWARE COMPANIES

Your product, with WhatsApp.

Add notifications, messaging and number connections to the experience you already provide.

Product event → customer message

AGENCIES & AUTOMATIONS

More clients. More control.

Organize instances by client and connect workflows over HTTP, with events returning via webhook.

Automation → WhatsApp → your system

OPERATIONS & E-COMMERCE

The right update, in the conversation.

Send order confirmations, appointment reminders and the updates your customers expect.

Order confirmed → customer informed

Operational architecture

One hub. Multiple connections.

Your Muapi account

Client AInstance 1

Client BInstance 2

Client CInstance 3

05 / GROW WITH CONTROL

As you grow, your foundation grows with you.

A foundation for teams managing numbers for multiple clients who need visibility into every connection.

API instance management
Configurable proxy per session
Logs and connection monitoring
Resource isolation per number

Let’s talk about my operation

BEFORE YOUR FIRST CONNECTION

Good questions. Straight answers.

Contact Muapi

Can I build my integration with AI assistance?

Yes. Use our documentation, OpenAPI and examples as context for your coding assistant. You remain responsible for reviewing the code, configuring credentials in your backend and testing the integration. This does not automatically connect the assistant to your Muapi account.

Is Muapi the official Meta API?

No. Muapi uses Whatsmeow to connect WhatsApp through device pairing. It is not Meta’s WhatsApp Cloud API. Connectivity depends on WhatsApp and may be restricted; there is no guarantee against account blocks.

How do I get started?

You can browse documentation and examples without signing in. To make API calls, you need an enabled account and your instance token. Contact us for access and commercial terms.

Does it work with n8n, Make and my CRM?

You can integrate tools that make HTTP requests and receive webhooks. In n8n and Make, use the generic HTTP modules. Muapi does not require you to change your stack.

Can I manage numbers for multiple clients?

Yes. The platform lets you manage multiple instances through the dashboard or API. Every session has its own environment and access token. Available quantities depend on your account configuration.

How do I receive messages and monitor connectivity?

Configure a webhook URL on your instance to receive events. You can select events, apply filters and check delivery status and failures. The documentation includes fields and examples.

What are the prices and limits?

Commercial plans are being finalized. Talk to our team about your instance count and use case. Availability, limits and terms are confirmed before you subscribe.

YOUR NEXT CONNECTION STARTS HERE

From your idea to the next conversation.

Explore the API. Imagine the experience. Connect your product.

Start integrating

Your product.More connected.