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MCPB Desktop Extensions

by Model Context Protocol

One-click local MCP server installation in desktop apps. Official MCPB (MCP Bundle) format from the Model Context Protocol project. 1,907 GitHub stars and 13 commits on main in the last 30 days.

1,907·5 tools·Released OCT 2025·NOASSERTION
npx -y @modelcontextprotocol/mcpb
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One-click local MCP server installation in desktop apps. Official MCPB (MCP Bundle) format from the Model Context Protocol project. 1,907 stars and 13 commits on main in the last 30 days.

Reviewed by M. Nouriel · MAY 2026

INSTALL THIS SERVER

{ "mcpServers": { "mcpb": { "command": "npx", "args": [ "-y", "@modelcontextprotocol/mcpb" ] } } }
PrereqNPM: `@modelcontextprotocol/mcpb`. Spec evolving; track release notes for breaking changes. Path: ~/Library/Application Support/Claude/claude_desktop_config.json (macOS).
{ "mcpServers": { "mcpb": { "command": "npx", "args": [ "-y", "@modelcontextprotocol/mcpb" ] } } }
{ "mcpServers": { "mcpb": { "command": "npx", "args": [ "-y", "@modelcontextprotocol/mcpb" ] } } }
{ "mcpServers": { "mcpb": { "command": "npx", "args": [ "-y", "@modelcontextprotocol/mcpb" ] } } }
{ "mcpServers": { "mcpb": { "command": "npx", "args": [ "-y", "@modelcontextprotocol/mcpb" ] } } }

5 TOOLS AVAILABLE

list_bundles
List installed MCPB bundles
Read
install_bundle
Install an MCPB bundle from a URL or file
Admin
uninstall_bundle
Uninstall an MCPB bundle by ID
Admin

OUR ASSESSMENT

Strengths
  • Official Model Context Protocol project.
  • 1,907 GitHub stars.
  • 13 commits on main in the last 30 days.
  • Standardises MCP server packaging.
  • Pack-and-distribute workflow built in.
Weaknesses
  • License NOASSERTION at inspection.
  • Spec evolving; bundle format may change before stable release.
  • Adoption depends on desktop client support.
Security Notes

No authentication. install_bundle pulls from URLs or local files; verify bundle source before installing in production. Bundles can include MCP servers with any tool surface; treat installation as installing third-party software.

Best For

Desktop app developers integrating MCP server installation; MCP server authors distributing pre-packaged bundles; users who want one-click MCP installs without manual config-file editing.

TECHNICAL DETAILS

Language
typescript
Transport
stdio
Clients
Claude DesktopClaude CodeCursorVS CodeWindsurf
License
NOASSERTION
GitHub
npm
@modelcontextprotocol/mcpb
Last Release
@modelcontextprotocol/mcpb (npm latest)MAY 9, 2026
First Released
OCT 1, 2025

ADOPTION METRICS

// GitHub Stars
1,907

// Reading this1,907 stars on modelcontextprotocol/mcpb. 13 commits on main in the last 30 days.

// Popularity Rank
#12
Globally · #12 in Dev Tools

// Reading thisPairs with MCP Registry, MCP Apps, MCP Inspector, MCPHub, ACI for the official MCP layer.

SOURCES & VERIFICATION

We don't take any single directory's word for it. Before scoring, we cross-reference 5 public MCP sources, install the server ourselves against the clients we cover, and record when we last re-verified.

01
Discovered
Manual submission
First indexed MAY 9, 2026
02
Cross-referenced
5 directories
PulseMCP, MCP.so, Glama, Smithery, Official MCP Registry
03
Verified against
Claude Desktop
Installed and tested across clients
04
Last re-checked
MAY 9, 2026
Weekly re-verification
// How other directories see it

The same server, 5 different lenses. We reconcile these signals into our editorial score, which is why our number sometimes diverges from a directory-aggregate star count.

SourceTheir ratingTheir star countTheir downloadsLast synced
AutomationSwitch This page4.4editorial1,907MAY 9, 2026
PulseMCP— unratedunavailableunavailableMAY 9, 2026
MCP.so— unratedunavailableunavailableMAY 9, 2026
Glama— unratedunavailableunavailableMAY 9, 2026
Smithery— unratedunavailableunavailableMAY 9, 2026
Official MCP Registry— unratedunavailableunavailableMAY 9, 2026

// Counts are directory-reported; we don't adjust them. Discrepancies usually come from different snapshot times or star-caching.

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// Get in touch

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