Hey everyone, I’m having a weird issue with my Shopify app. During the installation process, it’s failing to connect to the Shopify server at the OAuth access token step. This only happens on our testing server, not the production one.
I’ve checked and both servers have the same PHP settings and open ports. We can connect to other SSL websites just fine, so I’m thinking it might be something on Shopify’s end.
Has anyone run into this before? Could Shopify be blocking our testing server’s IP or domain? Any ideas on how to troubleshoot this would be super helpful.
Here’s a quick code snippet to illustrate what we’re trying:
$client = new ShopifyClient($shop, $token, API_KEY, SECRET);
try {
$accessToken = $client->getAccessToken($code);
} catch (Exception $e) {
echo 'Connection failed: ' . $e->getMessage();
}
Any suggestions would be great. Thanks!
I’ve encountered a similar issue before, and it turned out to be related to SSL certificate validation. Even though you can connect to other SSL websites, Shopify might be using stricter validation checks.
Try adding this line before making the API call:
$client->setCurlOption(CURLOPT_SSL_VERIFYPEER, false);
This disables SSL certificate verification, which isn’t ideal for production but can help isolate the problem. If it works, your testing environment might have an outdated or misconfigured SSL certificate store.
Another possibility is a firewall or security software on your testing server blocking outgoing connections to Shopify’s API endpoints. Check your server logs for any connection errors or blocked requests.
Lastly, ensure your app’s redirect URI in the Shopify Partner dashboard matches exactly with what you’re using in your testing environment. Even small discrepancies can cause OAuth failures.
If none of these solve it, you might need to reach out to Shopify support for further assistance.