All HTTP status codes

HTTP 411 Length Required

Client Error

The server insists on a Content-Length header and the request didn't include one (e.g. chunked uploads it refuses to accept).

Defined in RFC 9110

Common causes

  • Chunked transfer encoding to a server/proxy that requires explicit length

How to fix it

  1. Send Content-Length with the request body

  2. Disable chunked encoding in the client for that endpoint

Related status codes

400 Bad Request

The server can't or won't process the request because the client sent something malformed — invalid JSON, bad query parameters, broken headers or framing.

413 Content Too Large

The request body exceeds what the server is willing to process. Formerly called 'Payload Too Large'.

Want to explore status codes interactively? Try the free HTTP Status Code Reference — search, categories and example responses, right in your browser.