HTTP 404 Not Found indicates the server cannot find the requested resource. This is the most recognized HTTP status code, familiar even to non-technical users. While it simply means 'nothing here,' it carries significant SEO weight — Google treats persistent 404s as signals to remove URLs from its index. The response should include a helpful error page guiding users to find what they're looking for.
Response includes the status code, standard headers (including Content-Type), and a small diagnostic JSON body describing the request and returned status.
Simulator URL (copy in the app after load — not a normal link):
https://httpstatus.com/api/status/404
Example request:
curl -i "https://httpstatus.com/api/status/404"