How to install Ext Apps in Claude Code
To install Ext Apps in Claude Code, run "claude mcp add ext-apps -- npx -y @modelcontextprotocol/ext-apps" in your terminal, then check it with "claude mcp list". It takes about a minute.
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Run the install command
Open a terminal in your project and run:
claude mcp add ext-apps -- npx -y @modelcontextprotocol/ext-apps - 2
Choose where it applies (optional)
Add --scope user to use it in every project, or --scope project to share it with your team through a .mcp.json file.
claude mcp add --scope user ext-apps -- npx -y @modelcontextprotocol/ext-apps - 3
Check that it is connected
List your servers, or type /mcp inside a Claude Code session to see its status and tools.
claude mcp list
MCP servers run with your permissions. If Ext Apps needs an API key, add it under env in the config. Check its README.
Install Ext Apps in another app
Questions
Does Ext Apps work in Claude Code?
Yes. Claude Code supports mcp servers (local and remote), skills and plugins, and Ext Apps installs with the steps above.
Ext Apps does not show up in Claude Code. What now?
Restart Claude Code fully, check the JSON is valid, and make sure Node.js (for npx) is installed. See common MCP errors and fixes.
Is Ext Apps safe?
It scores 88 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.
