ZCA-JS

This is an unofficial Zalo API for personal account. It work by simulating the browser to interact with Zalo Web.

Warning: Using this API could get your account locked or banned. We are not responsible for any issues that may happen. Use it at your own risk.

Table of Contents

• Installation
• Documentation
• Basic Usages
  • Login
  • Listen for new messages
  • Send a message
  • Get/Send a sticker
• Example
• Projects
• Contributing
• License

Installation

bun install zca-js # or npm install zca-js

Documentation

See API Documentation for more details.

Basic Usages

Login

import { Zalo } from "zca-js";

const zalo = new Zalo();
const api = await zalo.loginQR();

Listen for new messages

import { Zalo, ThreadType } from "zca-js";

const zalo = new Zalo();
const api = await zalo.loginQR();

api.listener.on("message", (message) => {
    const isPlainText = typeof message.data.content === "string";

    switch (message.type) {
        case ThreadType.User: {
            if (isPlainText) {
                // received plain text direct message
            }
            break;
        }
        case ThreadType.Group: {
            if (isPlainText) {
                // received plain text group message
            }
            break;
        }
    }
});

api.listener.start();

Note: Only one web listener can run per account at a time. If you open Zalo in the browser while the listener is active, the listener will be automatically stopped.

Send a message

import { Zalo, ThreadType } from "zca-js";

const zalo = new Zalo();
const api = await zalo.loginQR();

// Echo bot
api.listener.on("message", (message) => {
    const isPlainText = typeof message.data.content === "string";
    if (message.isSelf || !isPlainText) return;

    switch (message.type) {
        case ThreadType.User: {
            api.sendMessage(
                {
                    msg: "echo: " + message.data.content,
                    quote: message, // the message object to reply to (optional)
                },
                message.threadId,
                message.type, // ThreadType.User
            );
            break;
        }
        case ThreadType.Group: {
            api.sendMessage(
                {
                    msg: "echo: " + message.data.content,
                    quote: message, // the message object to reply to (optional)
                },
                message.threadId,
                message.type, // ThreadType.Group
            );
            break;
        }
    }
});

api.listener.start();

Get/Send a sticker

api.getStickers("hello").then(async (stickerIds) => {
    // Get the first sticker
    const stickerObject = await api.getStickersDetail(stickerIds[0]);
    api.sendMessageSticker(
        stickerObject,
        message.threadId,
        message.type, // ThreadType.User or ThreadType.Group
    );
});

Example

See examples folder for more details.

Simple Server Example

Run bun run build to generate the library and then start the express server:

bun run server

Create server/credentials.json based on server/credentials.example.json.

Available endpoints:

• POST /send – send a message. Body should include threadId, message, and optional type (defaults to ThreadType.User).
• POST /api/:method – call any API method with JSON body as arguments.
• GET /messages – retrieve messages received since startup.

Projects

• MultiZlogin - Hệ thống quản lý đa tài khoản Zalo, hỗ trợ đăng nhập và quản lý nhiều tài khoản Zalo cùng lúc, tích hợp proxy và webhook.
• n8n-nodes-zalo-tools - N8N node cho Zalo cá nhân

Contributing

We welcome contributions from the community.

License

This project is licensed under the MIT License - see the LICENSE file for details.