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This HTTP header is not currently documented in our reference. Please file an Issue or make a PR adding documentation for this header.

About HTTP Headers

Section titled “About HTTP Headers”

HTTP headers are key-value pairs sent between clients and servers in HTTP requests and responses. They provide essential metadata about the request or response, such as content type, caching directives, authentication credentials, and more.

Headers are categorized into several types:

  • Request headers - Sent by the client to provide information about the request or the client itself (e.g., Accept, User-Agent, Authorization)
  • Response headers - Sent by the server to provide information about the response (e.g., Content-Type, Cache-Control, Set-Cookie)
  • Representation headers - Describe the particular representation of the resource (e.g., Content-Encoding, Content-Language)
  • Payload headers - Describe the payload data (e.g., Content-Length, Content-Range)

Common HTTP headers include:

  • Accept - Specifies media types the client can handle
  • Authorization - Contains credentials for authenticating the client
  • Cache-Control - Directives for caching mechanisms
  • Content-Type - Indicates the media type of the resource
  • Cookie - Contains stored HTTP cookies
  • User-Agent - Identifies the client software

If you believe this header should be documented, please consider contributing to this project or checking the IANA HTTP Field Name Registry for official information.