Adopting the MCP Bundle format (.mcpb) for portable local servers

The MCP Bundle format (MCPB) is now part of the Model Context Protocol project . This distribution format simplifies how developers package and share local MCP servers, enabling users to install them across any compatible client, including the Claude desktop app , Claude Code , and MCP for Windows . What are MCP Bundles? MCP Bundles are ZIP archives containing a local MCP server and a manifest.json that describes the server and its capabilities. The format is similar to Chrome extensions ( .crx ) or VS Code extensions ( .vsix ), enabling end users to install local MCP servers with a single cli