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Cojiroooo
Cojiroooo

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MCP using node on asdf

#mcp #claude #asdf

What happend?

I tried this tutorial( 👉https://modelcontextprotocol.io/quickstart ) , and encountered following error in MCP log when I started the Claude Desktop App.

2024-12-12T07:24:00.201Z [error] Could not start MCP server weather: Error: spawn node ENOENT at ChildProcess._handle.onexit (node:internal/child_process:286:19) at onErrorNT (node:internal/child_process:484:16) at process.processTicksAndRejections (node:internal/process/task_queues:82:21) { errno: -2, code: 'ENOENT', syscall: 'spawn node', path: 'node', spawnargs: [Array] }
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Environment

macOS 14.3.1(Sonoma)
asdf v0.13.1
node v20.11.0

% which node /Users/user_name/.asdf/shims/node
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Solution

My claude_desktop_config.json has problems.
I changed laude_desktop_config.json like "after" and restarted the Claude Desktop App.

  • before 
{ "mcpServers": { "weather": { "command": "node", "args": [ "/Users/user_name/develop/mcp/tutorial/weather-server/build/index.js" ] } } }
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  • after 
{ "mcpServers": { "weather": { "command": "node", "args": ["/Users/user_name/develop/mcp/tutorial/weather-server/build/index.js"], "env": { "PATH": "/Users/user_name/.asdf/shims:/usr/bin:/bin", "ASDF_DIR": "/opt/homebrew/opt/asdf/libexec", "ASDF_DATA_DIR": "/Users/user_name/.asdf", "ASDF_NODEJS_VERSION": "20.11.0" } } } }
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I add "env" key.
ASDF_DIR is set this(↓) value.

% echo $ASDF_DIR /opt/homebrew/opt/asdf/libexec
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Top comments (3)

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Hyperfocus •

OMG you really saved me there, thanks!!!

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Luke Chadwick •

Thank you!

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Mika Andrianarijaona •

Thank you, this was really helpful