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Debugger trying to use SSE even when set to STDIO #73

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matteematt opened this issue Apr 14, 2025 · 0 comments
Open

Debugger trying to use SSE even when set to STDIO #73

matteematt opened this issue Apr 14, 2025 · 0 comments

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@matteematt
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My setup

  1. I have created a new project using mcp create project-name
  2. I have added a new tool uisng mcp add tool tool-name
  3. I have run npm run build so there are js files in /dist
  4. I have run npx @modelcontextprotocol/inspector dist/index.js and opened the debugger on in my browser

On the browser my config is STDIO and dist/index.js

But when I click connect I receive

New SSE connection
Query parameters: {
  transportType: 'stdio',
  command: 'dist/index.js',
  args: '',
  env: '{"HOME":"/Users/matt.walker","LOGNAME":"matt.walker","PATH":"/Users/matt.walker/.npm/_npx/5a9d879542beca3a/node_modules/.bin:/Users/matt.walker/genesis/docs/_worktrees_git/mw/PTL-1903-docs-mcp-server/genesis-docs-mcp-server/node_modules/.bin:/Users/matt.walker/genesis/docs/_worktrees_git/mw/PTL-1903-docs-mcp-server/node_modules/.bin:/Users/matt.walker/genesis/docs/_worktrees_git/mw/node_modules/.bin:/Users/matt.walker/genesis/docs/_worktrees_git/node_modules/.bin:/Users/matt.walker/genesis/docs/node_modules/.bin:/Users/matt.walker/genesis/node_modules/.bin:/Users/matt.walker/node_modules/.bin:/Users/node_modules/.bin:/node_modules/.bin:/Users/matt.walker/.volta/tools/image/node/20.10.0/lib/node_modules/npm/node_modules/@npmcli/run-script/lib/node-gyp-bin:/Users/matt.walker/genesis/docs/_worktrees_git/mw/PTL-1903-docs-mcp-server/genesis-docs-mcp-server/node_modules/.bin:/Users/matt.walker/genesis/docs/_worktrees_git/mw/PTL-1903-docs-mcp-server/node_modules/.bin:/Users/matt.walker/genesis/docs/_worktrees_git/mw/node_modules/.bin:/Users/matt.walker/genesis/docs/_worktrees_git/node_modules/.bin:/Users/matt.walker/genesis/docs/node_modules/.bin:/Users/matt.walker/genesis/node_modules/.bin:/Users/matt.walker/node_modules/.bin:/Users/node_modules/.bin:/node_modules/.bin:/Users/matt.walker/.volta/tools/image/node/20.10.0/lib/node_modules/npm/node_modules/@npmcli/run-script/lib/node-gyp-bin:/Users/matt.walker/.volta/tools/image/yarn/1.22.19/bin:/Users/matt.walker/.volta/tools/image/node/20.10.0/bin:/Users/matt.walker/go/bin:/Users/matt.walker/.rd/bin:/Users/matt.walker/.volta/bin:/opt/homebrew/opt/gawk/libexec/gnubin:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/Users/matt.walker/.local/bin:/Users/matt.walker/go/bin:/Users/matt.walker/.rd/bin:/Users/matt.walker/.volta/bin:/opt/homebrew/opt/gawk/libexec/gnubin:/Users/matt.walker/.cargo/bin:/Users/matt.walker/Library/Application Support/JetBrains/Toolbox/scripts:/opt/homebrew/opt/fzf/bin:/Users/matt.walker/Library/Application Support/JetBrains/Toolbox/scripts","SHELL":"/bin/zsh","TERM":"alacritty","USER":"matt.walker"}'
}
Stdio transport: command=dist/index.js, args=
Error in /sse route: Error: spawn dist/index.js EACCES
    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: -13,
  code: 'EACCES',
  syscall: 'spawn dist/index.js',
  path: 'dist/index.js',
  spawnargs: []
}

It looks to me like the error is that it's trying to use sse to connect to the debugger and failing as I didn't add any SSE config. But I don't think I should need to use SSE because of selecting STDIO. Also I don't want to add SSE consiering it's deprecated

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