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Next Lens

A CLI that scans Next.js routes and provides quick insights from your terminal, web UI, and MCP.

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next-lens is a light CLI companion for the Next.js App Router. Scan any project and see API and page routes instantly in your terminal.

Lists app/**/page.* and shows whether loading / error is colocated or inherited.
Scans app/api/**/route.* with colorized HTTP methods.
Highlights dynamic, optional, and catch-all params so route shapes are obvious.
Reports Next.js / React / Node versions and the package manager.
Works on any target directory—no Next.js runtime needed.

Run in a Next.js project root, or pass another directory:

npx next-lens@latest [command] [target-directory]

[dir] arguments are optional, they default to the current directory.

next-lens about — one-page tool overview.
next-lens api:list [dir] [-m, --method] — list API routes and detected HTTP handlers.
next-lens page:list [dir] — list page routes and show loading / error coverage.
next-lens info [dir] — show Next.js / React / Node / package manager versions.
next-lens web [dir] — launch the inspector UI.
next-lens web:build [dir] — build a static readonly snapshot of the inspector.

Expose the same insights to IDEs or copilots via MCP:

{
  "mcpServers": {
    "next-lens": {
      "command": "npx",
      "args": ["next-lens@latest", "mcp"]
    }
  }
}