The HTTP 411 Length Required status code indicates that the server requires a Content-Length header.
Published 16 Jul 2026 · HTTP Status Code
The 411 Length Required response occurs when the server requires the client to provide the size of the request body.
Content-Length: 1024This can appear when configuring APIs, proxies, or upload services.
411 Length Required means the request must include its content length.
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The HTTP 412 Precondition Failed status code indicates that a request condition was not satisfied.
The HTTP 413 Content Too Large status code indicates that the request body is larger than the server allows.
The HTTP 414 URI Too Long status code indicates that the requested URL is longer than the server allows.