Long: header Short: H Arg:
Help: Pass custom header(s) to server Protocols: HTTP Category: http See-also: user-agent referer Example: -H "X-First-Name: Joe" $URL Example: -H "User-Agent: yes-please/2000" $URL Example: -H "Host:" $URL Added: 5.0 --- Extra header to include in the request when sending HTTP to a server. You may specify any number of extra headers. Note that if you should add a custom header that has the same name as one of the internal ones curl would use, your externally set header will be used instead of the internal one. This allows you to make even trickier stuff than curl would normally do. You should not replace internally set headers without knowing perfectly well what you are doing. Remove an internal header by giving a replacement without content on the right side of the colon, as in: -H \&"Host:". If you send the custom header with no-value then its header must be terminated with a semicolon, such as \-H \&"X-Custom-Header;" to send "X-Custom-Header:". curl will make sure that each header you add/replace is sent with the proper end-of-line marker, you should thus **not** add that as a part of the header content: do not add newlines or carriage returns, they will only mess things up for you. This option can take an argument in @filename style, which then adds a header for each line in the input file. Using @- will make curl read the header file from stdin. Added in 7.55.0. You need --proxy-header to send custom headers intended for a HTTP proxy. Added in 7.37.0. Passing on a "Transfer-Encoding: chunked" header when doing a HTTP request with a request body, will make curl send the data using chunked encoding. **WARNING**: headers set with this option will be set in all requests - even after redirects are followed, like when told with --location. This can lead to the header being sent to other hosts than the original host, so sensitive headers should be used with caution combined with following redirects. This option can be used multiple times to add/replace/remove multiple headers.