Getting invalid input error at amazon selling partner api

<?php

namespace App\Services;

use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Log;
use Carbon\Carbon;

class AmazonSPApiService
{
    private $accessKeyId;
    private $secretAccessKey;
    private $refreshToken;
    private $clientId;
    private $clientSecret;
    private $sellerId;

    public function __construct()
    {
        $this->accessKeyId = env('AMAZON_SP_API_ACCESS_KEY_ID');
        $this->secretAccessKey = env('AMAZON_SP_API_SECRET_ACCESS_KEY');
        $this->refreshToken = env('AMAZON_SP_API_REFRESH_TOKEN');
        $this->clientId = env('AMAZON_SP_API_CLIENT_ID');
        $this->clientSecret = env('AMAZON_SP_API_CLIENT_SECRET');
        $this->sellerId = env('AMAZON_SP_API_SELLER_ID');
    }

    private function getAccessToken()
    {
        $url = 'https://api.amazon.com/auth/o2/token';
        $response = Http::asForm()->post($url, [
            'grant_type' => 'refresh_token',
            'refresh_token' => $this->refreshToken,
            'client_id' => $this->clientId,
            'client_secret' => $this->clientSecret,
        ]);

        $data = $response->json();
 
        return $data['access_token'];
    }

    private function makeApiRequest($endpoint, $method = 'GET', $params = [])
    {
        $token = $this->getAccessToken();
        $url = "https://sellingpartnerapi-na.amazon.com$endpoint";
//   dd($token);
        try {
            $response = Http::withHeaders([
                'Authorization' => "Bearer $token",
                'x-amz-access-token' => $token,
                'x-amz-date' => Carbon::now()->format('Ymd\THis\Z'),
            ])->$method($url, $params);
dd($response->json());
            return $response->json();
        } catch (\Exception $e) {
            Log::error('Error making SP API request: ' . $e->getMessage());
            return null;
        }
    }

    public function getProducts()
    {
        $endpoint = '/catalog/v0/items'; // Example endpoint for catalog
        $params = [
            'asin' => 'B07JGTVTWN', // Example ASIN, replace with your own
            'marketplaceId' => 'ATVPDKIKX0DER', // Example marketplace ID
        ];
        return $this->makeApiRequest($endpoint, 'GET', $params);
    }

    // Add more methods to interact with other SP API endpoints
}

Route: Route::get('/amazon-products', [AmazonSPApiController::class, 'getProducts']);

and controller class:

use App\Services\AmazonSPApiService;
use Illuminate\Http\Request;

class AmazonSPApiController extends Controller
{
    protected $amazonSPApiService;

    public function __construct(AmazonSPApiService $amazonSPApiService)
    {
        $this->amazonSPApiService = $amazonSPApiService;
    }

    public function getProducts()
    {
        $products = $this->amazonSPApiService->getProducts();

        if ($products) {
            return response()->json(['data' => $products]);
        } else {
            return response()->json(['error' => 'Unable to fetch products'], 500);
        }
    }

this cataglog items api returns Invalid Input error when I call above route where controller class is using AmazonSPApiService service

tuncdogu55

1 year ago

Level 1

I couldn't find the field asin in the Catalog Items API documentation at this link:

https://developer-docs.amazon.com/sp-api/docs/catalog-items-api-v2022-04-01-reference

If this is the correct link, it seems that asin might not be a part of the request parameters. Since asin is a unique identifier for a product, if you want to retrieve information for a specific product, your request might need to look like this:

public function getOneProduct($productAsin)
{
    $endpoint = '/catalog/v0/items/'.$productAsin; // Example endpoint for catalog
    $params = [
        'marketplaceId' => 'ATVPDKIKX0DER', // Example marketplace ID
    ];
    return $this->makeApiRequest($endpoint, 'GET', $params);
}

Could you try making the request in this format? This method should allow you to retrieve information for a single product using its ASIN.

And for your all product :

 public function getProducts()
    {
        $endpoint = '/catalog/v0/items'; // Example endpoint for catalog
        $params = [
            'marketplaceId' => 'ATVPDKIKX0DER', // Example marketplace ID
        ];
        return $this->makeApiRequest($endpoint, 'GET', $params);
    }

I hope this will be helpfull for your problem.

martinbean

1 year ago

Level 80

@muazzamazaz You shouldn’t be using the env helper in your code. You should be mapping environment variables to configuration values:

// config/services.php
return [
    'amazon' => [
        'selling_partner' => [
            'key' => env('AMAZON_SP_API_ACCESS_KEY_ID'),
            'secret' => env('AMAZON_SP_API_SECRET_ACCESS_KEY'),
            'refresh_token' => env('AMAZON_SP_API_REFRESH_TOKEN'),
            'client_id' => env('AMAZON_SP_API_CLIENT_ID'),
            'client_secret' => env('AMAZON_SP_API_CLIENT_SECRET'),
            'seller_id' => env('AMAZON_SP_API_SELLER_ID'),
        ],
    ],
];

You could then actually bind a fully-configured instance of your service class to the service container, and inject that into your controller instead:

public function register(): void
{
    $this->app->singleton(AmazonSellingPartnerService::class, function () {
        return new AmazonSellingPartnerService(
          // Actually pass configuration values instead of
          // grabbing them in your constructor
        );
    });
}

class FooController extends Controller
{
    protected AmazonSellingPartnerService $service;

    public function __construct(AmazonSellingPartnerService $service)
    {
        $this->service = $service;
    }
}

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