LocalFree

When MCP server

WhenLabs-org/when

Developer toolkit: stack detection for AI context files, port conflicts, .env schema validation, docs drift, dependency license audits and task timing.

4 GitHub stars
Source code

Install When in Claude Code

Claude Code
claude mcp add when -- npx -y @whenlabs/when
mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)
{
  "mcpServers": {
    "when": {
      "command": "npx",
      "args": [
        "-y",
        "@whenlabs/when"
      ]
    }
  }
}

Frequently asked questions

What does the When MCP server do?

Developer toolkit: stack detection for AI context files, port conflicts, .env schema validation, docs drift, dependency license audits and task timing.

Is the When MCP server free?

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Does When run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add When to Claude Code?

Run: claude mcp add when -- npx -y @whenlabs/when

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