Error 13001 — Main image URL is invalid or unreachable

Amazon's image crawler couldn't load the URL you supplied for main_image_url. The listing won't go live until Amazon can fetch a valid image from a reliable host.

Either (1) the URL returns 404/500/timeout, (2) it's blocked by robots.txt, (3) it requires authentication, or (4) the host blocks Amazon's crawler IPs. Amazon retries for ~24h before failing the listing.

1. Open the image URL in a private/incognito browser — if it doesn't load instantly, Amazon won't be able to load it either.
2. Confirm the URL is HTTPS (Amazon may flag HTTP), publicly accessible, and not behind a CDN that throttles bots.
3. Make sure your robots.txt allows Amazon's crawler — at minimum, don't disallow the /images/ path.
4. Re-host the images on a stable CDN (Amazon S3, Cloudflare, Imgix) — Shopify CDN URLs are accepted but expire if you delete the source product.
5. Resubmit the feed. Amazon typically refreshes images within 4–24 hours after a successful re-fetch.

• Using URLs with query strings (?v=12345) — Amazon may strip them and 404
• Hot-linking from a Shopify draft product — URL goes dead the moment you publish
• Hosting on a domain with WAF rules that block headless user-agents