Shopify Webhooks (Event-Driven)

Shopify includes an HMAC signature in the HTTP headers of every webhook request, which is generated using your app's specific secret API key. You must verify this signature on your backend by hashing the request body with your secret key and comparing the result. If the signatures match, you can safely process the data; if they do not, you should reject the request immediately.

Shopify webhooks are generally limited to a predefined set of standard store events, such as 'Order Created' or 'Product Updated'. However, you can use Shopify Flow or custom Shopify Functions to trigger specific workflows based on these core events. For highly granular custom logic, developers often combine standard webhooks with Storefront API polling.

Shopify has a built-in retry mechanism that will attempt to resend the webhook if it does not receive a timely 200 OK HTTP response from your server. The system will wait a few seconds between retries and continue this process over a 48-hour period. This ensures that temporary server downtime does not result in permanently lost data or missed events.

Yes, webhooks work seamlessly with a Remix or Hydrogen architecture by serving as the event trigger for your backend loaders and actions. When Shopify fires a webhook, it hits your Remix backend route, allowing you to update caches or trigger data fetches. This event-driven approach prevents your frontend from constantly polling the Shopify API for updates.