MeshMend MCP server

MeshMend — MCP server

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Check and repair 3D-printing meshes (STL and 3MF) from an AI assistant that can run tools on your computer: Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Codex CLI, Gemini CLI or any other MCP client that starts local servers.

Ask “is ~/prints/bracket.stl watertight?”, “why does my slicer say this model has holes?” or “把这个 3MF 转成 STL”: the assistant reads the file on your machine, tells you exactly what is wrong (holes, flipped faces, inside-out shells, non-manifold edges, duplicate triangles), says honestly whether an automatic repair will fix it, and writes a repaired copy next to the original.

Your files never leave your computer. The server runs locally, reads and writes only the files you name, makes no network requests and has no telemetry. The original file is never overwritten. It is the same mesh code as the free in-browser tool at mesh-mend.pages.dev.

npx -y github:Keith-CY/meshmend-mcp

Status: version 0.1.0. Publishing to npm is pending; until then npx -y github:Keith-CY/meshmend-mcp (needs Node.js 18+ and git) runs the same build, and Claude Desktop users can install the one-click bundle from Releases.

Tools

Every result comes as readable text and as structured JSON (structuredContent, with an outputSchema). check_mesh is marked read-only; the other two only create new files (destructiveHint: false).

Where results go: next to the input, as .repaired.stl (or .stl for a conversion), then -2, -3, … rather than replacing anything. With output_path, an existing file is replaced only with overwrite: true, and the input file can never be the output.

Connect it

Claude Desktop

One click: download meshmend-mcp-0.1.0.mcpb from Releases and open it (or Settings → Extensions → Advanced settings → Install extension…). Claude Desktop runs it with its built-in Node.js.

Or by hand: Settings → Developer → Edit config and add to claudedesktopconfig.json:

{
  "mcpServers": {
    "meshmend": {
      "command": "npx",
      "args": ["-y", "github:Keith-CY/meshmend-mcp"]
    }
  }
}

Claude Code

claude mcp add meshmend -- npx -y github:Keith-CY/meshmend-mcp

Cursor

~/.cursor/mcp.json (or .cursor/mcp.json in a project):

{
  "mcpServers": {
    "meshmend": { "command": "npx", "args": ["-y", "github:Keith-CY/meshmend-mcp"] }
  }
}

VS Code (GitHub Copilot)

.vscode/mcp.json:

{
  "servers": {
    "meshmend": { "type": "stdio", "command": "npx", "args": ["-y", "github:Keith-CY/meshmend-mcp"] }
  }
}

Windsurf

~/.codeium/windsurf/mcp_config.json: the same mcpServers block as Cursor.

Codex CLI

~/.codex/config.toml:

Shortened. The full README is on GitHub.