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mcpb-packager

v1.0.0

Published

Packaging automation tool for MCP servers as Desktop Extensions (.mcpb)

Vulnerabilities

Powered byPowered by Snyk
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  • 0Low

Links

Git

Maintainers

javier.cuervas..gmail.comjavier.cuervas..gmail.com

Keywords

mcpmcpbanthropicaipackagerextensiondesktop

Readme

mcpb-packager

A command-line tool to automate the packaging of Model Context Protocol (MCP) servers into .mcpb Desktop Extensions. It can package local source directories, npm/PyPI packages launched on demand, or GitHub repositories cloned on the fly.

Installation

npm install -g mcpb-packager

Under the hood it uses @anthropic-ai/mcpb, which is installed automatically.

Prerequisites

  • Node.js ≥ 16 (always required)
  • git — only if you use --type http to clone repositories
  • uvx (from astral-sh/uv) — only if your end users will launch a Python MCP via --type uvx

Usage

Package an npm package (via npx)

mcpb-packager --package @energio/holded-mcp --type npx --env HOLDED_API_KEY

Use --env to declare the environment variables the end user will be prompted for when installing the extension.

Package a Python package (via uvx)

mcpb-packager --package trello-mcp-server --type uvx --env TRELLO_API_KEY

Package from a GitHub repository

The tool clones the repository, runs its install/build commands, and produces the bundle.

mcpb-packager --package https://github.com/user/repo-mcp.git --type http

Package a local MCP source directory

Drop an mcp-config.json next to your server and run from the parent directory:

mcpb-packager                  # scans cwd for any subdirectory with mcp-config.json
mcpb-packager ./my-local-mcp   # packages a specific local directory

Options

  • -p, --package <pkg> (Required for external packages) — npm package, PyPI package, or git URL.
  • -t, --type <type> (Required with --package) — execution strategy: npx, uvx, or http.
  • -e, --env <vars> (Optional) — comma-separated list of env variables the user will fill in (API_KEY,DB_HOST).
  • -a, --args <args> (Optional) — extra arguments passed through to the server when launched.
  • -o, --out <dir> (Optional) — output directory for generated .mcpb files. Defaults to the current working directory. Relative paths are resolved against the cwd.
  • -h, --help — show usage.

Output

By default the generated .mcpb files are written to the current working directory. Pass --out <dir> to redirect them somewhere else.

License

MIT