HTTP Status Codes

Understanding HTTP status codes is essential for diagnosing why an RSS feed suddenly stops updating on social media. This tag covers what codes like 200, 301, 304, 403, 404, 429, and 500 actually mean when an auto-posting tool fetches your feed, how caching headers like ETag interact with them, and practical steps for diagnosing and fixing the ones that silently break automation. Start here if your auto-posting has stopped working and you're not sure why. The one people misread most often is 304, which means nothing has changed and is exactly what you want to see. 403 and 429 are the two worth acting on, since both mean your server is refusing the tool that reads your feed.