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Discoverability · Next.js (App Router)

How to declare a sitemap in robots.txt in Next.js (App Router)

robots.txt is the one location every crawler checks first. Declaring the sitemap there costs one line and removes any dependence on the file sitting at a guessable path.

The fix for Next.js (App Router)

13x detects your framework from the response and hands you this version rather than the generic one — below 50% confidence it hedges and gives you the generic one instead.

Add the sitemap field to app/robots.ts:

ts code
import type { MetadataRoute } from "next";

export default function robots(): MetadataRoute.Robots {
  return {
    rules: [{ userAgent: "*", allow: "/" }],
    sitemap: "https://example.com/sitemap.xml",
  };
}

On a different stack? The general version of this fix explains what 13x checks and why it matters, without assuming a framework.

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