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Documentation Index

Fetch the complete documentation index at: https://docs.trace.probebrowser.com/llms.txt

Use this file to discover all available pages before exploring further.

The Trace MCP Server acts as a bridge, effectively giving your AI Agent eyes and hands to debug your local applications. It implements the Model Context Protocol.

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⚡ Quick Start

The server runs on your local machine using npx. It does not require installation. 
npx -y @probebrowser/mcp-server

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🛠️ IDE Configuration

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1. Claude Desktop App

To use Trace with Claude, you need to add it to your claude_desktop_config.json. Location:
  • Mac: ~/Library/Application Support/Claude/claude_desktop_config.json
  • Windows: %APPDATA%\Claude\claude_desktop_config.json
Configuration: 
{
  "mcpServers": {
    "trace": {
      "command": "npx",
      "args": [
        "-y",
        "@probebrowser/mcp-server"
      ],
      "env": {
        "TRACE_API_KEY": "sk_live_...", 
        "HEADLESS": "false" 
      }
    }
  }
}
Tip: Set HEADLESS to "false" if you want to watch the browser open and click things while Claude works.

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2. Cursor (AI Editor)

Cursor has built-in MCP support.
  1. Open Cursor Settings (Cmd + ,).
  2. Navigate to Features -> MCP.
  3. Click + Add New Server.
    • Name: trace
    • Type: command
    • Command: npx -y @probebrowser/mcp-server
  4. (Optional) Add Environment Variables for TRACE_API_KEY.

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3. Windsurf / Other MCP Clients

Any client supporting the stdio transport can connect. Command: 
npx -y @probebrowser/mcp-server

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🔐 Environment Variables

VariableDescription
TRACE_API_KEYRequired for AI analysis and Cloud features.
HEADLESStrue (default) or false. Set to valid boolean string.
PORT(SSE Mode only) Port to run the HTTP server on. Default: 3000.
TRANSPORTstdio (default) or sse.

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🧪 Verification

Once configured:
  1. Restart your IDE (Claude/Cursor).
  2. Ask the Agent: “Check the console logs of the active page” or “Click the signup button”.
  3. You should see the tool execution in the Agent’s thought process.