https://v2.webnotes.in/tags/webhooks/Recent content in Webhooks on WebNotesHugoen-INTue, 12 May 2026 00:00:00 +0000https://v2.webnotes.in/how-to-use-postback-urls-kite-connect/Tue, 12 May 2026 00:00:00 +0000https://v2.webnotes.in/how-to-use-postback-urls-kite-connect/<p>The <a href="https://v2.webnotes.in/kite-connect-api/">Kite Connect API</a> includes a postback (webhook) mechanism that pushes order update notifications to your server the moment an order changes state. Instead of polling <code>GET /orders</code> repeatedly, your server receives an HTTP POST at the registered postback URL each time an order moves from <code>OPEN</code> to <code>COMPLETE</code>, <code>REJECTED</code>, <code>CANCELLED</code>, or any intermediate state. This guide covers registration, checksum verification, a Python server implementation, and production hardening.</p> <aside class="callout callout--key" role="note"> <strong class="callout__label">Prerequisites</strong> <div class="callout__body"><ul> <li>An active Kite Connect subscription (Rs 2,000/month plus GST). See <a href="https://v2.webnotes.in/how-to-generate-kite-connect-api-key/">How to generate a Kite Connect API key</a> .</li> <li>A valid <code>api_key</code> and <code>api_secret</code>. Postback integrity verification requires the <code>api_secret</code>.</li> <li>A publicly accessible HTTPS server where Zerodha can deliver POST requests. Zerodha requires HTTPS; plain HTTP postback URLs are not accepted in production.</li> <li>Basic familiarity with HTTP servers in Python (Flask or similar).</li> </ul> </div> </aside> <aside class="callout callout--info" role="note"> <strong class="callout__label">Conflict-of-interest disclosure</strong> <div class="callout__body">WebNotes is an independent knowledge base. This guide is not sponsored by Zerodha or any third party.</div> </aside> <h2 id="what-is-a-postback-url">What is a postback URL?</h2> <p>A postback URL is an HTTP POST endpoint you register in the Kite Connect developer console. Whenever an order placed through your app changes state at Zerodha&rsquo;s OMS (Order Management System), Zerodha sends an HTTP POST request to your postback URL with the updated order details in the request body.</p>