This MCP server enables large language models to control a web browser through Puppeteer, allowing them to navigate websites, take screenshots, and interact with web elements. It integrates with Claude Desktop to provide browser automation capabilities.
npm install
npm run build
npm start
To use Steel Puppeteer with Claude Desktop, add this configuration to your Claude Desktop config file (typically at ~/Library/Application Support/Claude/claude_desktop_config.json
on macOS):
{
"mcpServers": {
"steel-puppeteer": {
"command": "node",
"args": ["path/to/steel-puppeteer/dist/index.js"],
"env": {
"STEEL_LOCAL": "true"
}
}
}
}
Replace path/to/steel-puppeteer/dist/index.js
with the actual path to the compiled JavaScript file on your system.
Configure Steel Puppeteer using these environment variables:
STEEL_LOCAL
(optional, default: "false"): Set to "true" to use a local Steel instanceSTEEL_API_KEY
(required if using cloud service): Your Steel API keySTEEL_URL
(optional): Custom Steel instance URL if not using the defaultYou can set these directly in your shell or create a .env
file in the project root.
STEEL_LOCAL=true
STEEL_API_KEY=your-steel-api-key
STEEL_LOCAL=false
Navigate to any URL in the browser:
puppeteer_navigate
Parameters:
url
(string, required): URL to navigate totimeout
(number, optional, default: 60000): Navigation timeout in millisecondswaitUntil
(string, optional, default: "domcontentloaded"): When to consider navigation succeeded. Options: "load", "domcontentloaded", "networkidle0", "networkidle2"Capture screenshots of the entire page or specific elements:
puppeteer_screenshot
Parameters:
name
(string, required): Name for the screenshotselector
(string, optional): CSS selector for element to screenshotpuppeteer_click
Parameter: selector
(string, required): CSS selector for element to click
puppeteer_fill
Parameters:
selector
(string, required): CSS selector for input fieldvalue
(string, required): Value to fillpuppeteer_select
Parameters:
selector
(string, required): CSS selector for element to selectvalue
(string, required): Value to selectpuppeteer_hover
Parameter: selector
(string, required): CSS selector for element to hover
puppeteer_evaluate
Parameter: script
(string, required): JavaScript code to execute
puppeteer_get_content
Parameter: selector
(string, optional): CSS selector to get content from specific elements. If not provided, returns whole page content
puppeteer_scroll
Parameters:
scrollDelay
(number, optional, default: 100): Delay between scrolls in millisecondsmaxScrolls
(number, optional, default: 50): Maximum number of scrollsThe server provides access to two types of resources:
Access browser console output:
console://logs
View captured screenshots:
screenshot://<name>
Where <name>
is the name specified when taking the screenshot.
To add this MCP server to Claude Code, run this command in your terminal:
claude mcp add-json "steel-puppeteer" '{"command":"node","args":["path/to/steel-puppeteer/dist/index.js"],"env":{"STEEL_LOCAL":"true"}}'
See the official Claude Code MCP documentation for more details.
There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json
file so that it is available in all of your projects.
If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json
file.
To add a global MCP server go to Cursor Settings > Tools & Integrations and click "New MCP Server".
When you click that button the ~/.cursor/mcp.json
file will be opened and you can add your server like this:
{
"mcpServers": {
"steel-puppeteer": {
"command": "node",
"args": [
"path/to/steel-puppeteer/dist/index.js"
],
"env": {
"STEEL_LOCAL": "true"
}
}
}
}
To add an MCP server to a project you can create a new .cursor/mcp.json
file or add it to the existing one. This will look exactly the same as the global MCP server example above.
Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.
The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.
You can also explicitly ask the agent to use the tool by mentioning the tool name and describing what the function does.
To add this MCP server to Claude Desktop:
1. Find your configuration file:
~/Library/Application Support/Claude/claude_desktop_config.json
%APPDATA%\Claude\claude_desktop_config.json
~/.config/Claude/claude_desktop_config.json
2. Add this to your configuration file:
{
"mcpServers": {
"steel-puppeteer": {
"command": "node",
"args": [
"path/to/steel-puppeteer/dist/index.js"
],
"env": {
"STEEL_LOCAL": "true"
}
}
}
}
3. Restart Claude Desktop for the changes to take effect