Overview

Error 300204 appears in Seller Central when Amazon’s backend cannot download a media file from the URL you supplied in a product listing. The failure typically stems from the host returning an HTTP 204 “No Content” response, which means the request is acknowledged but no image data is delivered. Sellers who store images on their own servers or rely on third‑party hosts must resolve this issue quickly to keep listings active.

Key Points

• HTTP 204 response — Amazon receives a 204 status code, indicating the request succeeded but the server sent no file, so the image cannot be processed.
• File disappearance — The referenced image may have been moved, renamed, or deleted, causing the URL to point to a non‑existent resource.
• Restricted access — URLs that require login, token authentication, or IP‑based firewalls block Amazon’s crawler, resulting in the same error.
• Typographical errors — A missing slash, wrong file extension, or extra character in the URL directs Amazon to an invalid address.
• Server misconfiguration — Some web servers or CD N setups mistakenly return 204 instead of 200 OK for static files, triggering the error across multiple listings.

How Error 300204 Occurs

1. Amazon requests the media URL — When a seller submits a listing, Amazon’s ingestion engine sends an HTTP GET request to the exact URL listed in the image field. Example: Amazon calls https://images.myshop.com/sku12345_main.jpg.
2. Host returns a 204 status — The web server acknowledges the request but replies with “204 No Content,” either because the file is missing, the request is blocked, or the server’s rewrite rules misinterpret the request. Example: The server’s .htaccess rule redirects unknown files to a 204 response instead of a 404.
3. Amazon flags error 300204 — Receiving no image data, Amazon marks the submission with error 300204 and prevents the listing from going live until the media issue is fixed. Example: The seller sees “Error 300204 – Media URL Access Failure” in the listing diagnostics panel.