MCP Server Config Builder

Build a valid .mcp.json for Claude Code or Claude Desktop. Pick presets, edit inline, copy. No bad JSON, no missing fields.

{
  "mcpServers": {
    "filesystem": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-filesystem",
        "${REPO_ROOT}"
      ]
    }
  }
}