What is MCP?

The protocol that lets AI assistants control desktop apps like InDesign.

Model Context Protocol

MCP (Model Context Protocol) is an open standard that allows AI assistants to interact with external tools and applications. Instead of just chatting, AI can actually do things — read files, query databases, or in Sidekick's case, control InDesign.

Think of MCP as a universal language that lets AI assistants talk to desktop applications. Sidekick implements an MCP server that translates your requests into InDesign commands.

What is MCPB?

MCPB (MCP Bundle) is Claude's native extension format for one-click installation of MCP servers. Double-click an .mcpb file and it's installed — no terminal commands required.

Not all MCP clients support MCPB yet. If yours doesn't, you can install Sidekick manually instead.

MCP Clients

Sidekick works with any application that supports MCP. Here are some popular options:

Claude Desktop
Anthropic's official desktop app. Supports MCPB for one-click install.
Recommended
Cursor
AI-powered code editor. Use the standalone installer.
Windsurf
Codeium's AI IDE. Use the standalone installer.
Continue
Open-source AI code assistant for VS Code and JetBrains.

See the full list of MCP clients on the official MCP website.