Subscribe to Square for Restaurants order webhooks for real-time order event handling

Steps

1. Create or log into your Square Developer account and register an application in the Square Developer Dashboard.
2. Navigate to the Webhooks section for your application and create a new webhook subscription; provide your HTTPS endpoint URL.
3. Select the order event types you need: order.created fires when a new order is placed, order.updated fires when an order is modified, and order.fulfillment.updated fires when a fulfillment state changes.
4. Implement your webhook receiver endpoint to accept Square's POST requests; Square includes a signature in the request headers — validate the signature using your webhook signature key from the Dashboard to authenticate incoming events.
5. Parse the event payload to extract the order ID, location ID, order state, and line items; use the Order ID to call the Retrieve Order endpoint if you need the full order detail not included in the webhook body.
6. Respond with HTTP 200 within a few seconds; for processing-intensive workflows, acknowledge immediately and handle order logic asynchronously.