##  Response fields  [  [ edit
](/w/index.php?title=List_of_HTTP_header_fields&action=edit&section=8 "Edit
section: Response fields") ]

###  Standard response fields  [  [ edit
](/w/index.php?title=List_of_HTTP_header_fields&action=edit&section=9 "Edit
section: Standard response fields") ]

Field name  |  Description  |  Example  |  Status  |  Standard   
---|---|---|---|---  
Accept-CH  |  Requests [ HTTP Client Hints ](/wiki/HTTP_Client_Hints "HTTP Client Hints") |  ` Accept-CH: UA, Platform ` |  Experimental  |  [ RFC ](/wiki/RFC_\(identifier\) "RFC \(identifier\)") [ 8942 ](https://datatracker.ietf.org/doc/html/rfc8942)  
Access-Control-Allow-Origin,  
Access-Control-Allow-Credentials,  
Access-Control-Expose-Headers,  
Access-Control-Max-Age,  
Access-Control-Allow-Methods,  
Access-Control-Allow-Headers  [12]  |  Specifying which web sites can participate in [ cross-origin resource sharing ](/wiki/Cross-origin_resource_sharing "Cross-origin resource sharing") |  ` Access-Control-Allow-Origin: * ` |  Permanent: standard  |  [ RFC ](/wiki/RFC_\(identifier\) "RFC \(identifier\)") [ 7480 ](https://datatracker.ietf.org/doc/html/rfc7480)  
Accept-Patch  [47]  |  Specifies which patch document formats this server supports  |  ` Accept-Patch: text/example;charset=utf-8 ` |  Permanent  |  [ RFC ](/wiki/RFC_\(identifier\) "RFC \(identifier\)") [ 5789 ](https://datatracker.ietf.org/doc/html/rfc5789)  
Accept-Ranges  |  What partial content range types this server supports via [ byte serving ](/wiki/Byte_serving "Byte serving") |  ` Accept-Ranges: bytes ` |  Permanent  |  [ RFC ](/wiki/RFC_\(identifier\) "RFC \(identifier\)") [ 9110 ](https://datatracker.ietf.org/doc/html/rfc9110)  
Age  |  The age the object has been in a [ proxy cache ](/wiki/Proxy_cache "Proxy cache") in seconds  |  ` Age: 12 ` |  Permanent  |  [ RFC ](/wiki/RFC_\(identifier\) "RFC \(identifier\)") [ 9111 ](https://datatracker.ietf.org/doc/html/rfc9111)  
Allow  |  Valid methods for a specified resource. To be used for a _405 Method not allowed_ |  ` Allow: GET, HEAD ` |  Permanent  |  [ RFC ](/wiki/RFC_\(identifier\) "RFC \(identifier\)") [ 9110 ](https://datatracker.ietf.org/doc/html/rfc9110)  
Alt-Svc  [48]  |  A server uses "Alt-Svc" header (meaning Alternative Services) to indicate that its resources can also be accessed at a different network location (host or port) or using a different protocol  When using HTTP/2, servers should instead send an ALTSVC frame.  [49]  |  ` Alt-Svc: http/1.1="http2.example.com:8001"; ma=7200 ` |  Permanent  |   
[ Cache-Control ](/wiki/Cache-Control "Cache-Control") |  Tells all caching mechanisms from server to client whether they may cache this object. It is measured in seconds  |  ` Cache-Control: max-age=3600 ` |  Permanent  |  [ RFC ](/wiki/RFC_\(identifier\) "RFC \(identifier\)") [ 9111 ](https://datatracker.ietf.org/doc/html/rfc9111)  
Connection  |  Control options for the current connection and list of hop-by-hop response fields.  [13]  Must not be used with HTTP/2.  [14]  |  ` Connection: close ` |  Permanent  |  [ RFC ](/wiki/RFC_\(identifier\) "RFC \(identifier\)") [ 9110 ](https://datatracker.ietf.org/doc/html/rfc9110)  
Content-Disposition  [50]  |  An opportunity to raise a "File Download" dialogue box for a known MIME type with binary format or suggest a filename for dynamic content. Quotes are necessary with special characters.  |  ` Content-Disposition: attachment; filename="fname.ext" ` |  Permanent  |  [ RFC ](/wiki/RFC_\(identifier\) "RFC \(identifier\)") [ 2616 ](https://datatracker.ietf.org/doc/html/rfc2616) , [ 4021 ](https://datatracker.ietf.org/doc/html/rfc4021) , [ 6266 ](https://datatracker.ietf.org/doc/html/rfc6266)  
Content-Encoding  |  The type of encoding used on the data. See [ HTTP compression ](/wiki/HTTP_compression "HTTP compression") .  |  ` Content-Encoding: gzip ` |  Permanent  |  [ RFC ](/wiki/RFC_\(identifier\) "RFC \(identifier\)") [ 9110 ](https://datatracker.ietf.org/doc/html/rfc9