Browser Use MCP Server

  


A fast, lightweight Model Context Protocol (MCP) server that empowers LLMs with browser automation via Puppeteer’s structured accessibility data, featuring optional vision mode for complex visual understanding and flexible, cross-platform configuration.


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- ⚡ Fast & lightweight. Utilizes Puppeteer's label index, not pixel-based input and accessibility DOM tree.
- 👁️ Vision Mode Support. Optional visual understanding capabilities for complex layouts and visual elements when structured data isn't sufficient.
- 🤖 LLM-optimized. No vision models needed, operates purely on structured data, less context reducing context token usage.
- 🧩 Flexible Runtime Configuration. Customize viewport size, coordinate system factors, and User-Agent at runtime via HTTP headers.
- 🌐 Cross-Platform & Extensible. Support for remote and local browsers, the use of a custom browser engine.

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- Node.js 18 or newer
- VS Code, Cursor, Windsurf, Claude Desktop or any other MCP client

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#### Local (Stdio)

First, install the Browser MCP server with your client. A typical configuration looks like this:

``js
{
"mcpServers": {
"browser": {
"command": "npx",
"args": [
"@agent-infra/mcp-server-browser@latest"
]
}
}
}
`

Install in VS Code

You can also install the Browser MCP server using the VS Code CLI:

`bash


For VS Code


code --add-mcp '{"name":"browser","command":"npx","args":["@agent-infra/mcp-server-browser@latest"]}'
`

After installation, the Browser MCP server will be available for use with your GitHub Copilot agent in VS Code.

Install in Cursor

Go to Cursor Settings -> MCP -> Add new MCP Server. Name to your liking, use command type with the command npx @agent-infra/mcp-server-browser. You can also verify config or add command like arguments via clicking Edit.

`js
{
"mcpServers": {
"browser": {
"command": "npx",
"args": [
"@agent-infra/mcp-server-browser@latest"
]
}
}
}
`


Install in Windsurf

Follow Windsuff MCP documentation. Use following configuration:

`js
{
"mcpServers": {
"browser": {
"command": "npx",
"args": [
"@agent-infra/mcp-server-browser@latest"
]
}
}
}
`


Install in Claude Desktop

Follow the MCP install guide, use following configuration:

`js
{
"mcpServers": {
"browser": {
"command": "npx",
"args": [
"@agent-infra/mcp-server-browser@latest"
]
}
}
}
`


#### Remote (SSE / Streamable HTTP)

At the same time, use --port $your_port arg to start the browser mcp can be converted into SSE and Streamable HTTP Server.

`bash


normal run remote mcp server

npx @agent-infra/mcp-server-browser --port 8089

run with DISPLAY environment for VNC or other virtual display

DISPLAY=:0 npx @agent-infra/mcp-server-browser --port 8089
`

You can use one of the two MCP Server remote endpoint:
- Streamable HTTP(Recommended): http://127.0.0.1::8089/mcp
- SSE: http://127.0.0.1::8089/sse


And then in MCP client config, set the url to the SSE endpoint:

`js
{
"mcpServers": {
"browser": {
"url": "http://127.0.0.1::8089/sse"
}
}
}
`

url to the Streamable HTTP:

`js
{
"mcpServers": {
"browser": {
"type": "streamable-http", // If there is MCP Client support
"url": "http://127.0.0.1::8089/mcp"
}
}
}
`

#### In-memory call

If your MCP Client is developed based on JavaScript / TypeScript, you can directly use in-process calls to avoid requiring your users to install the command-line interface to use Browser MCP.

`js
import { Client } from '@modelcontextprotocol/sdk/client/index.js';
import { InMemoryTransport } from '@modelcontextprotocol/sdk/inMemory.js';

// type: module project usage
import { createServer } from '@agent-infra/mcp-server-browser';
// commonjs project usage
// const { createServer } = await import('@agent-infra/mcp-server-browser')

const client = new Client(
{
name: 'test browser client',
version: '1.0',
},
{
capabilities: {},
},
);

const server = createServer();
const [clientTransport, serverTransport] = InMemoryTransport.createLinkedPair();

await Promise.all([
client.connect(clientTransport),
server.connect(serverTransport),
]);

// list tools
const result = await client.listTools();
console.log(result);

// call tool
const toolResult = await client.callTool({
name: 'browser_navigate',
arguments: {
url: 'https://www.google.com',
},
});
console.log(toolResult);
`

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Browser MCP server supports following arguments. They can be provided in the JSON configuration above, as a part of the "args" list:

`
> npx @agent-infra/mcp-server-browser@latest -h
-V, --version output the version number
--browser browser or chrome channel to use, possible values: chrome, edge, firefox.
--cdp-endpoint CDP endpoint to connect to, for example "http://127.0.0.1:9222/json/version"
--ws-endpoint WebSocket endpoint to connect to, for example "ws://127.0.0.1:9222/devtools/browser/{id}"
--executable-path path to the browser executable.
--headless run browser in headless mode, headed by default
--host host to bind server to. Default is localhost. Use 0.0.0.0 to bind to all interfaces.
--port port to listen on for SSE and HTTP transport.
--proxy-bypass comma-separated domains to bypass proxy, for example ".com,chromium.org,.domain.com"
--proxy-server specify proxy server, for example "http://myproxy:3128" or "socks5://myproxy:8080"
--user-agent specify user agent string
--user-data-dir path to the user data directory.
--viewport-size specify browser viewport size in pixels, for example "1280, 720"
--output-dir path to the directory for output files
--vision Run server that uses screenshots (Aria snapshots are used by default)
-h, --help display help for command
`

#### Runtime Configuration

The browser runtime requires configuration for Viewport Size, Vision Model Coordinate Factors, and User Agent. These can be passed through corresponding HTTP headers:

| Header | Description |
|--------|-------------|
| x-viewport-size | Browser viewport size, format: width,height separated by comma |
| x-vision-factors | Vision model coordinate system factors, format: x_factor,y_factor separated by comma |
| x-user-agent | User Agent string, defaults to system User Agent if not specified |
> Note: Header names are case-insensitive.

Example:

`http
x-viewport-size: 1920,1080
x-vision-factors: 1.0,1.0
x-user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36
`




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We have unified the deployment of VNC and MCP under a single URL endpoint, The Dockerfile and DockerHub image will be published together! video

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#### Tools

| Tool Name | Description | Parameters |
|-----------|-------------|------------|
| browser_click | Click an element on the page, before using the tool, use browser_get_clickable_elements to get the index of the element, but not call browser_get_clickable_elements multiple times | index (number, optional): Index of the element to click |
| browser_close | Close the browser when the task is done and the browser is not needed anymore | |
| browser_close_tab | Close the current tab | |
| browser_evaluate | Execute JavaScript in the browser console | script (string, required): JavaScript code to execute, () => { / code / } |
| browser_form_input_fill | Fill out an input field, before using the tool, Either 'index' or 'selector' must be provided | selector (string, optional): CSS selector for input field, priority use index, if index is not provided, use selector
index (number, optional): Index of the element to fill
value (string, required): Value to fill
clear (boolean, optional): Whether to clear existing text before filling |
| browser_get_clickable_elements | Get the clickable or hoverable or selectable elements on the current page, don't call this tool multiple times | |
| browser_get_download_list | Get the list of downloaded files | |
| browser_get_markdown | Get the markdown content of the current page | |
| browser_get_text | Get the text content of the current page | |
| browser_go_back | Go back to the previous page | |
| browser_go_forward | Go forward to the next page | |
| browser_hover | Hover an element on the page, Either 'index' or 'selector' must be provided | index (number, optional): Index of the element to hover
selector (string, optional): CSS selector for element to hover |
| browser_navigate | Navigate to a URL | url (string, required): |
| browser_new_tab | Open a new tab | url (string, required): URL to open in the new tab |
| browser_press_key | Press a key on the keyboard | key (string, required): Name of the key to press or a character to generate, such as Enter, Tab, Escape, Backspace, Delete, Insert, F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12, ArrowLeft, ArrowRight, ArrowUp, ArrowDown, PageUp, PageDown, Home, End, ShiftLeft, ShiftRight, ControlLeft, ControlRight, AltLeft, AltRight, MetaLeft, MetaRight, CapsLock, PrintScreen, ScrollLock, Pause, ContextMenu |
| browser_read_links | Get all links on the current page | |
| browser_screenshot | Take a screenshot of the current page or a specific element | name (string, optional): Name for the screenshot
selector (string, optional): CSS selector for element to screenshot
index (number, optional): index of the element to screenshot
width (number, optional): Width in pixels (default: viewport width)
height (number, optional): Height in pixels (default: viewport height)
fullPage (boolean, optional): Full page screenshot (default: false)
highlight (boolean, optional): Highlight the element |
| browser_scroll | Scroll the page | amount (number, optional): Pixels to scroll (positive for down, negative for up), if the amount is not provided, scroll to the bottom of the page |
| browser_select | Select an element on the page with index, Either 'index' or 'selector' must be provided | index (number, optional): Index of the element to select
selector (string, optional): CSS selector for element to select
value (string, required): Value to select |
| browser_switch_tab | Switch to a specific tab | index (number, required): Tab index to switch to |
| browser_tab_list | Get the list of tabs | |
| browser_vision_screen_capture | Take a screenshot of the current page for vision mode | |
| browser_vision_screen_click | Click left mouse button on the page with vision and snapshot, before calling this tool, you should call browser_vision_screen_capture first only once, fallback to browser_click if failed | factors (array, optional): Vision model coordinate system scaling factors [width_factor, height_factor] for coordinate space normalization. Transformation formula: x = (x_model screen_width width_factor) / width_factor y = (y_model screen_height height_factor) / height_factor where x_model, y_model are normalized model output coordinates (0-1), screen_width/height are screen dimensions, width_factor/height_factor are quantization factors, If the factors are unknown, leave it blank. Most models do not require this parameter.
x (number, required): X pixel coordinate
y (number, required): Y pixel coordinate |

#### Resources

| Resource Name | URI Pattern | Description | MIME Type |
|---------------|-------------|-------------|-----------|
| Browser console logs | console://logs | | text/plain |
| Browser Downloads | download://{name} | | Automatic identification based on file extension |
| Browser Screenshots | screenshot://{name} | | Automatic identification based on file extension |

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Access http://127.0.0.1:6274/:

`bash
npm run dev
`

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`js
#!/usr/bin/env node

const {
BaseLogger,
setConfig,
addMiddleware,
} = require('@agent-infra/mcp-server-browser/request-context');

class CustomLogger extends BaseLogger {
info(...args) {
console.log('custom');
console.log(...args);
}
}

addMiddleware((req, res, next) => {
console.log('req', req.headers);
next();
});

setConfig({
logger: new CustomLogger(),
});

// start server
require('@agent-infra/mcp-server-browser/index');
``