Stripe Subscription Error TokenMismatchException

You need to add a CSRF token to your form. If using blade, simply adding {{ csrf_field() }} inside your form should take care of it. More here: http://laravel.com/docs/5.1/routing#csrf-protection

Nope. I did that, still same thing. That's my code.

form action="" method="POST" type="hidden" name="_token" value="{{ csrf_token() }}"

Don't put it inside the opening form tag. Put it in between the opening and closing form tags. The csrf_field() function just creates a hidden input in your form named _token that contains the token.

like so:

<form id="myform">
    {{ csrf_field() }}
    <input name="name">
</form>

Stripe does not know what to do with the CSRF token you are passing through, you can exclude the CSRF token from being used by adding the URI used to the $except array within the VerifyCSFToken middleware and removing it from the form.