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/HTTP

Access-Control-Request-Method

The Access-Control-Request-Method request header is used when issuing a preflight request to let the server know which HTTP method will be used when the actual request is made. This header is necessary as the preflight request is always an OPTIONS and doesn't use the same method as the actual request.

Header type	Request header
Forbidden header name	yes

Syntax

Access-Control-Request-Method: <method>

Directives

<method>: One of the HTTP request methods, for example GET, POST, or DELETE.

Examples

Access-Control-Request-Method: POST

Specifications

Specification	Status	Comment
Fetch The definition of 'Access-Control-Request-Method' in that specification.	Living Standard	Initial definition.

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	4	12	3.5	10	12	4