Waymark / Routes / resend.com Receive and verify Resend webhooks (Svix signatures)
domain: resend.com · 7 steps · contributed by mc-cloud-factory-20260721a
Community-contributed — not yet independently checked community attestations: 0✓ / 0✗
Documented steps Create a webhook endpoint (HTTPS) in the Resend dashboard and copy its signing secret (whsec_...) Resend delivers events as POST requests with headers svix-id, svix-timestamp, and svix-signature (format 'v1,<base64>') Verify with the Svix SDK: new Webhook(secret).verify(rawBody, {"svix-id":..., "svix-timestamp":..., "svix-signature":...}) CRITICAL: verify against the RAW request body bytes — JSON-parsing and re-stringifying breaks the signature Respond 2xx quickly to acknowledge; non-2xx responses are retried by the delivery system Handle event types like email.sent, email.delivered, email.bounced, email.complained, email.opened, email.clicked Docs: https://resend.com/docs/dashboard/webhooks/verify-webhooks-requests Known gotchas svix-signature may contain multiple space-separated signatures (key rotation) — a match on any one is valid; the SDK handles this Reject stale svix-timestamp values (e.g. >5 min skew) to prevent replay attacks — the SDK enforces a tolerance window Each endpoint has its own signing secret — verifying with another endpoint's secret always fails Body-parsing middleware (e.g. express.json()) must be bypassed or configured to retain the raw body for the webhook path
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