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HTTP status codes
What does this status code actually mean?
The codes worth knowing, each with the header it is supposed to be sent with. Most of the confusion is not the number but the obligation attached to it - a 429 without Retry-After, a 405 without Allow.
- 401 means unauthenticated; needs a WWW-Authenticate header Unauthorized
how to use it
- Type the code, or a word from its name.
- Read the meaning and, where there is one, the header the code obliges.
- The family row says whose fault the response is claiming it is.
what this page cannot do
The extension reads the statuses a live page's own requests came back with, in order, so a 302 chain or a background 401 is found rather than looked up.
Requests in the panel What did this page load, and which request failed or dragged?
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