Browser JavaScript Evaluator

by matdmiller

196 downloads

Not rated

GitHub

Automation

About

This is a reference design for a MCP server that hosts a web page that connects back to the server via sse and allows Claude to execute javascript on the page.

Details

Author: matdmiller
Downloads: 196
Categories: Automation

Setting up with Highlight

This MCP is not yet compatible with Highlight’s one-click setup. However, you can still use it with Highlight by following these steps:

Download and install Highlight from highlightai.com/download
Navigate to the plugins tab and select "Add Custom Plugin"
Configure the plugin with the settings below

Plugin Name Browser JavaScript Evaluator

Command (node, npx, python, etc.)

Please refer to the README for specific instructions on how to obtain API keys or other required environment variables.
Enable "Start Automatically" if you want the plugin to start when Highlight launches

Setting up with Cursor

Open Cursor's settings
Navigate to the MCP section
Click "Add new Global MCP server"
Copy and paste the configuration below based on your operating system

JSON

{
    "mcpServers": {
        "browser javascript evaluator": {
            "mcp_py_sse_browser_control": {
                "command": "python",
                "args": [
                    "web_server.py"
                ]
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "browser javascript evaluator": {
            "mcp_py_sse_browser_control": {
                "command": "python",
                "args": [
                    "web_server.py"
                ]
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "browser javascript evaluator": {
            "mcp_py_sse_browser_control": {
                "command": "python",
                "args": [
                    "web_server.py"
                ]
            }
        }
    }
}

Setting up with Claude Desktop

Open Claude Desktop's settings
Go to the Integrations tab
Click "Add MCP Server"
Use the configuration below based on your operating system

Note: Make sure Claude Desktop is running before attempting to connect.

JSON

{
    "mcpServers": {
        "browser javascript evaluator": {
            "mcp_py_sse_browser_control": {
                "command": "python",
                "args": [
                    "web_server.py"
                ]
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "browser javascript evaluator": {
            "mcp_py_sse_browser_control": {
                "command": "python",
                "args": [
                    "web_server.py"
                ]
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "browser javascript evaluator": {
            "mcp_py_sse_browser_control": {
                "command": "python",
                "args": [
                    "web_server.py"
                ]
            }
        }
    }
}

Setting up with Windsurf

Open Windsurf's preferences
Go to the Integrations section
Click "Add MCP Integration"
Use the configuration below based on your operating system

JSON

{
    "mcpServers": {
        "browser javascript evaluator": {
            "mcp_py_sse_browser_control": {
                "command": "python",
                "args": [
                    "web_server.py"
                ]
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "browser javascript evaluator": {
            "mcp_py_sse_browser_control": {
                "command": "python",
                "args": [
                    "web_server.py"
                ]
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "browser javascript evaluator": {
            "mcp_py_sse_browser_control": {
                "command": "python",
                "args": [
                    "web_server.py"
                ]
            }
        }
    }
}

Setting up with Cline

Open Cline's settings
Navigate to the Integrations section
Click "Add MCP Server"
Copy and paste the configuration below based on your operating system

Note: Make sure to restart Cline after adding the configuration.

JSON

{
    "mcpServers": {
        "browser javascript evaluator": {
            "mcp_py_sse_browser_control": {
                "command": "python",
                "args": [
                    "web_server.py"
                ]
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "browser javascript evaluator": {
            "mcp_py_sse_browser_control": {
                "command": "python",
                "args": [
                    "web_server.py"
                ]
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "browser javascript evaluator": {
            "mcp_py_sse_browser_control": {
                "command": "python",
                "args": [
                    "web_server.py"
                ]
            }
        }
    }
}

Setting up with Goose

Open Goose's preferences
Go to the Integrations tab
Select "MCP Servers"
Click "Add New Server"
Use the configuration below based on your operating system

JSON

{
    "mcpServers": {
        "browser javascript evaluator": {
            "mcp_py_sse_browser_control": {
                "command": "python",
                "args": [
                    "web_server.py"
                ]
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "browser javascript evaluator": {
            "mcp_py_sse_browser_control": {
                "command": "python",
                "args": [
                    "web_server.py"
                ]
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "browser javascript evaluator": {
            "mcp_py_sse_browser_control": {
                "command": "python",
                "args": [
                    "web_server.py"
                ]
            }
        }
    }
}

From the repository

Add the server to your Claude Desktop configuration using uv pointing to the repository directory and the browser_server.py script. After launching Claude, open a browser to http://127.0.0.1:8000 to connect. The server provides two tools: execute_javascript (run any JavaScript) and add_numbers (add two numbers via browser execution).

Claude Desktop / Cursor

Paste into your MCP client config file to install this server.

{
    "mcpServers": {
        "browser javascript evaluator": {
            "mcp_py_sse_browser_control": {
                "command": "python",
                "args": [
                    "web_server.py"
                ]
            }
        }
    }
}

McpServers

{
    "mcp_py_sse_browser_control": {
        "command": "python",
        "args": [
            "web_server.py"
        ]
    }
}

Browser JavaScript Evaluator

This project provides a way to execute JavaScript code in a browser from Python using MCP (Model Control Protocol).

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Browser JavaScript Evaluator

About

Details

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Setting up with Highlight

Setting up with Cursor

JSON

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Setting up with Claude Desktop

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Setting up with Windsurf

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Setting up with Cline

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Setting up with Goose

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From the repository

Claude Desktop / Cursor

McpServers

Browser JavaScript Evaluator

Install

About

Details

Jump to

Setting up with Highlight

From the repository

Claude Desktop / Cursor

McpServers

Browser JavaScript Evaluator

Install

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