koel/app/Http/Controllers/API/ArtistController.php

<?php

namespace App\Http\Controllers\API;

use App\Models\Artist;
use Illuminate\Http\JsonResponse;

class ArtistController extends Controller
{
    /**
     * Get extra information about an artist via Last.fm.
     *
     * @param Artist $artist
     *
     * @return JsonResponse
     */
    public function getInfo(Artist $artist)
    {
        return response()->json($artist->getInfo());
    }
}