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Blocking Affects: link data quality

Fix “Landing page error” on Meta Commerce Manager

Meta's crawler can't reach the product page. 404, 500, redirect to non-product page, geo-restricted, or blocked by robots.txt. Items don't serve until reachable.

What you see in Meta Commerce Manager:

Landing page error

Meta's crawlers (facebookexternalhit, meta-externalagent) need to reach product pages. Robots.txt blocking, geo-restrictions, JavaScript-rendering issues, and expired authentication all cause unreachable-page flags.

The pre-rendering imperative is the modern lesson: JS-heavy pages don't render reliably for crawlers. SSR or static-generation for product content ensures crawlers see what users see. Pure client-side rendering creates fragility.

Top causes

  • 1

    Product page URL changed without feed update

  • 2

    robots.txt blocking facebookexternalhit or meta-externalagent

  • 3

    JavaScript-rendered pages without server-side rendering for crawlers

  • 4

    Geo-restrictions that block Meta's US-based crawlers

How to fix it

  1. 1

    Test each affected URL

    Open in incognito. Confirm 200 response and matching product content.

  2. 2

    Allow Meta's crawlers

    User-agent: facebookexternalhit and meta-externalagent must have /products/ access in robots.txt.

  3. 3

    Pre-render for JS-heavy sites

    If your product pages need JS to render content, use SSR or prerendering for the visible product info.

  4. 4

    Force a catalog refresh

    Items revalidate within 24 hours.

Related issues

Google Merchant Center

Landing page not crawlable

Googlebot can't reach the product page. The URL might be 404, redirected to a non-product page, blocked in robots.txt, or behind authentication. Affected items can't be served because users would land on a broken page.

Read more
Pinterest Catalog

Broken landing page

Pinterest's crawler can't reach the product page. 404, redirect to non-product page, blocked by robots.txt, or HTTPS issues. Items with broken landing pages can't serve as shopping pins.

Read more

Related fields

link

FAQ

Which Meta user agents do I need to allow?

facebookexternalhit (older, for OG-style crawls) and meta-externalagent (newer, for catalog crawls). Allow both in robots.txt.

Last reviewed: 26 May 2026

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