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Trail Code

Trail Code is an MCP server that adds developer tools to AI assistants such as Claude Desktop, Claude Code and Cursor. Turbocharge Claude Code, Cursor, Codex, Gemini & every coding agent: faster, cheaper, with contextual understanding specific to your codebase. It has 10,761 GitHub stars, is released under the MIT license and runs locally with npx -y @nanonets/graft.

github.com/trailhq/Trail-Code (opens in a new tab)

Data as of from the GitHub API; description from the project's repository. Report an error

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Install Trail Code

Generated from the server's published package. Replace your-value with your own values.

Claude Desktop

claude_desktop_config.json
{
  "mcpServers": {
    "trail-code": {
      "command": "npx",
      "args": [
        "-y",
        "@nanonets/graft"
      ]
    }
  }
}

Settings > Developer > Edit Config. macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\. Restart Claude Desktop afterwards.

Claude Code

claude mcp add --transport stdio trail-code -- npx -y @nanonets/graft

Cursor

.cursor/mcp.json
{
  "mcpServers": {
    "trail-code": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@nanonets/graft"
      ]
    }
  }
}

Project file; use ~/.cursor/mcp.json to enable it in every project.

VS Code

.vscode/mcp.json
{
  "servers": {
    "trail-code": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@nanonets/graft"
      ]
    }
  }
}

Config formats checked against the official docs on Oct 7, 2026: modelcontextprotocol.io (opens in a new tab), code.claude.com (opens in a new tab), cursor.com (opens in a new tab), code.visualstudio.com (opens in a new tab).

About Trail Code

Trail-code gives Claude Code, Cursor, Codex and other coding agents a map of your code, and what your team has learned about it.

  • ai-agents
  • claude-code
  • code-graph
  • context-engineering
  • developer-tools
  • knowledge-graph
  • llm
  • mcp
  • mcp-server
  • tree-sitter

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FAQ

Trail Code FAQ

Still curious? Email info@appsgit.com.

How do I install the Trail Code MCP server?

Add the command npx -y @nanonets/graft to your MCP client: put it in claude_desktop_config.json for Claude Desktop, run claude mcp add for Claude Code, or add it to .cursor/mcp.json (Cursor) or .vscode/mcp.json (VS Code). The snippets on this page are ready to paste.

Is Trail Code free?

The server is open source under the MIT license, so running it is free. It does not declare any required API key.

Is Trail Code actively maintained?

The most recent commit was on Oct 26, 2026. appsgit only lists MCP servers with a commit in the last six months.