If you are using laravel as api only, you might want to return JSON on every request, even on errors/exceptions. The easiest way to do so is using this middleware globally.

JsonMiddleware.php

<?php 

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;

class JsonMiddleware 
{
    public function handle(Request $request, Closure $next) 
    {
        $request->headers->set('Accept', 'application/json');
        
        return $next($request);
    }
}