A field disappeared from Shopify webhooks for two days and every monitor stayed

<p>Shopify deprecated the <code>authorizationCode</code> field on <code>OrderTransaction</code> in the Admin GraphQL API, starting with the <code>2026-01</code> version, and

<p><a class="article-body-image-wrapper"

<p>The thing that breaks before 1,000 users is almost never the code.</p> <p>Not a race condition. Not a memory leak. Not a missing index. Founders assume their app will collapse

<p>I review a lot of webhook handlers. Roughly <strong>3 out of 5 either have a subtle signature-verification bug</strong> — or someone disabled verification entirely "to make it

<p>Most Shopify middleware works fine in staging. It breaks in production, during a sale, at 11pm on a Friday.</p> <p>After auditing dozens of integrations, the failures are