Read the full setup guide here: https://docs.nano-gpt.com/integrations/mcp

Claude Code quick start

For Claude Code, use the current claude mcp add ... -- command args form.

macOS / Linux

claude mcp add nanogpt --scope user \
  --env NANOGPT_API_KEY=your_actual_key_here \
  -- npx -y @nanogpt/mcp

Windows

claude mcp add nanogpt --scope user --env NANOGPT_API_KEY=your_actual_key_here -- cmd /c "C:\Program Files\nodejs\npx.cmd" -y @nanogpt/mcp

On native Windows, npx is usually a .cmd shim. Launching it through cmd /c avoids a bad MCP setup that can look like an API key problem.

Troubleshooting

• If Claude Code already has an older `nanogpt` MCP entry, remove it and add it again.
• If you use WSL, use the macOS / Linux command inside WSL instead of the native Windows one.
• If you see `Invalid API key` right after setup, verify the launch command as well as the key value.