Error 13100 — Image link unreachable from Amazon's catalog crawler

Amazon's catalog ingestion crawler couldn't fetch the image URL even after multiple retries. The URL may be valid in a browser but blocked at the network level.

Common causes: (1) Cloudflare/AWS WAF blocking Amazon's crawler IP range, (2) the image is behind a login or referrer check, (3) the host returns 4xx for missing User-Agent or non-browser requests, or (4) DNS issues on the hosting domain.

1. Test the image URL using `curl -I` from a server outside your network — if it works in your browser but fails via curl, you have a bot protection issue.
2. Whitelist Amazon's crawler in your CDN/WAF rules (Amazon publishes IP ranges).
3. Move images to a public CDN with no anti-bot protection: Amazon S3, Cloudfront, Imgix, or similar.
4. Avoid requiring HTTP referrer checks on the image host — Amazon's crawler doesn't send referrers.

• Hosting on the same domain as the storefront with WAF enabled — splits between human and bot traffic and 403s the latter
• Using a Shopify image URL that includes ?v=hash — Amazon strips it and gets a different (or 404) response