Webhook guides for the error you just saw
Each guide explains what the provider signs, why the check fails and the fix for your framework.
- StripeStripe: “No signatures found matching the expected signature for payload”
Why stripe.webhooks.constructEvent throws “No signatures found matching the expected signature for payload”, and the fix for Express, Next.js, NestJS, Django, Flask and Laravel: verify the raw body with the right whsec_ secret.
- GitHubGitHub webhook signature mismatch (X-Hub-Signature-256)
Your GitHub webhook signature check fails? How X-Hub-Signature-256 is computed, why a parsed or form-encoded body breaks it, and a constant-time check in Node.js and Python.
- ShopifyShopify webhook HMAC verification failing
Why your Shopify X-Shopify-Hmac-Sha256 check fails: base64 not hex, raw body not parsed JSON, and the right secret for app webhooks or admin webhooks. Working code for Node.js, PHP and Python.
- SlackSlack request signature verification failing (X-Slack-Signature)
How Slack signs requests (v0:timestamp:body), why slash commands and interactivity break naive checks, and a correct verification in Node.js and Python with the 5-minute replay window.
- TestingTesting webhooks end-to-end with Playwright, Vitest or Jest
Create a capture URL, trigger the flow, wait for the request and assert on headers, body and signature.