panel/app/Http/Middleware/VerifyCsrfToken.php

<?php

namespace Pterodactyl\Http\Middleware;

use Illuminate\Foundation\Http\Middleware\VerifyCsrfToken as BaseVerifier;

class VerifyCsrfToken extends BaseVerifier
{
    /**
     * The URIs that should be excluded from CSRF verification.
     *
     * @var array
     */
    protected $except = [
        'remote/*',
        'daemon/*',
        'api/*',
    ];
}