使用PHP版eBay Inventory SDK遇401 Unauthorized错误求解

Hey there, let's tackle this 401 Unauthorized error with your eBay Inventory API SDK for PHP—super common issue, so we'll work through it step by step.

This is the #1 cause of 401s with eBay APIs:

• Verify that your config.php has the exact correct Client ID, Client Secret, and Refresh Token (if using OAuth 2.0). Even a single extra space or missing character will break authentication. eBay’s credentials are case-sensitive, so don’t mix up uppercase/lowercase letters.
• Make sure you’re using sandbox credentials for sandbox testing, and production credentials for live calls—they’re not interchangeable. It’s easy to copy-paste the wrong set by mistake!

eBay’s OAuth access tokens expire after 2 hours, so a stale token will throw a 401:

• Check if your controller.php logic includes token refresh handling. When the access token expires, you need to use your refresh token to fetch a new one before making API calls.
• If you’re manually generating tokens via the eBay Developer Portal, confirm the token hasn’t expired. You can decode the JWT token (using a tool like jwt.io) to check its exp timestamp.

• Ensure your config.php points to the correct API endpoint:
  • Sandbox: https://api.sandbox.ebay.com
  • Production: https://api.ebay.com
    Using the wrong endpoint with valid credentials will still trigger a 401.
• Head to your eBay Developer Account dashboard and verify your app has the Inventory API permissions enabled. If you’re building a user-facing app, also confirm that the user has granted your app access to their inventory data (missing user consent will cause 401s too).

Even if you unzipped the SDK to vendor, there might be gaps:

• If the SDK requires Composer-managed dependencies, don’t rely on manual unzipping alone. Run composer require ebay/sdk (or the specific package for Inventory API) to ensure all required libraries and autoload files are properly installed.
• Check your client initialization code in controller.php to make sure you’re passing all required config values. For example:

  $config = require __DIR__ . '/config.php';
  $inventoryClient = new \eBay\Inventory\Client($config);
  

  Confirm your $config array includes clientId, clientSecret, refreshToken, and environment keys with valid values.

If all the above checks pass, dig into the raw request:

• Use a tool like Charles Proxy or Postman to capture the API call. Look at the Authorization header—it should be formatted as Bearer <your-access-token>. If the token is missing, malformed, or invalid, that’s the issue.
• Compare the request against eBay’s Inventory API documentation to ensure you’re hitting the correct endpoint with the right headers.

If you’re still stuck, share a redacted snippet of your config.php (hide sensitive credentials!) and the client initialization code from controller.php—that’ll help narrow things down further.

内容的提问来源于stack exchange，提问作者Ris Peterson