request header content type code example

Example 1: content type http header

Content-Type: <Type>;

Examples:
  Content-Type: application/json;
  Content-Type: text/html;
  Content-Type: video/mp4;

Example 2: content-type header api

Content-Type header is used in POST , PUT , PATCH to
specify the type of body you are sending 
to the serve and it's required.