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Add Deductive MCP Server to Claude Code

Copy the displayed command and run it in your terminal to register the Deductive MCP server with Claude Code.
  1. Copy the displayed command from the setup page.
  2. Paste and run the command in your terminal. The command will complete without output if successful.
Related Documentation: Claude Code MCP Documentation

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Restart and Authenticate

Restart Claude Code to activate the MCP server, then complete the authentication flow.
  1. Restart Claude Code. Authentication flow should begin automatically.
  2. If the authentication flow doesn’t start automatically, type ‘/mcp’ in Claude Code and select ‘Authenticate’ from the menu.
  3. Complete the authentication flow in the browser window that opens.
  4. Once this is complete, you’re ready to go! You can now use Deductive AI MCP Server tools in Claude Code chat.

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Troubleshooting

If you encounter authentication issues, check the following requirements.
  1. If the Deductive MCP server is failing to authenticate, make sure your Node.js version is >20 (latest is 22).
  2. You can check your Node.js version by running ‘node —version’ in your terminal.
  3. If your version is outdated, update Node.js to the latest version and restart Claude Code.