Headers: Access-Control-Request-Method

Access-Control-Request-Method header

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

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The HTTP Access-Control-Request-Method request header is used by browsers 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 because the preflight request is always an OPTIONS and doesn't use the same method as the actual request.

Header type	Request header
Forbidden request header	Yes

Syntax

Access-Control-Request-Method: <method>

Directives

<method>: An HTTP request method; for example, GET, POST, or DELETE.

Examples

Access-Control-Request-Method: POST

Specifications

Specification
Fetch> # http-access-control-request-method>

Browser compatibility

	Desktop					Mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android	WebView on iOS
`Access-Control-Request-Method`	4	12	3.5	12	4	18	4	12	3.2	1.0	2	3.2