从外部发送到laravel应用程序时出现TokenMismatchException

So I have an application that sends an AJAX request to an external server which does some stuff then makes a post call to the laravel application that made the initial call.

So I am trying to do a POST call to the laravel application. Now from the AJAX request i am sending the csrf_token()

Here are the headers I've put into my post request:

X-CSRF-TOKEN: LO8Dg7j1jZssXXGSLIa8inBgh2Y1QSsp6Birc1Ui
X-Requested-With: XMLHttpRequest
Content-Type: application/x-www-form-urlencoded

That token belongs to the logged in user that made the AJAX request. Now the problem i'm getting is from this i get a TokenMismatchException500 error.

Is there something else I need to do in my external post calls headers in order to not encounter this error?

As i've got the CSRF token i am using a rest client to try send a test post using those headers and I get the same error?

The aim is on the recieving laravel app controller will then be able to use the token and i'll be able to use $request->user(); to get the user.

Note the recieving route has the web middleware attached to it.