Resend Webhooks

If you're handling email events from Resend, this gives you working webhook handlers with proper signature verification using Svix under the hood. It covers the essential pattern: raw body parsing (critical for verification), checking those svix-id/timestamp/signature headers, and handling events like email.sent, email.delivered, and email.bounced. The manual verification code is useful if you're not using the SDK or working in another language. One thing to note: it references a separate webhook-handler-patterns skill for idempotency and retry logic, which you'll definitely want since email webhooks can duplicate. Ships with Express, Next.js, and FastAPI examples plus a Hookdeck CLI command for local testing without ngrok.

skills.sh installs: 266
GitHub stars: 100
last updated: Aug 21, 2026

View on GitHub

Install

$ npx -y skills add hookdeck/webhook-skills --skill resend-webhooks --agent claude-code

Installs into .claude/skills of the current project.

Files

Resend Webhooks

When to Use This Skill

Setting up Resend webhook handlers
Debugging signature verification failures
Understanding Resend event types and payloads
Handling email delivery events (sent, delivered, bounced, etc.)
Processing inbound emails via email.received events

Essential Code (USE THIS)

Express Webhook Handler (Using Resend SDK)

const express = require('express');
const { Resend } = require('resend');

const resend = new Resend(process.env.RESEND_API_KEY);
const app = express();

// CRITICAL: Use express.raw() for webhook endpoint - Resend needs raw body
app.post('/webhooks/resend',
  express.raw({ type: 'application/json' }),
  async (req, res) => {
    try {
      // Verify signature using Resend SDK (uses Svix under the hood)
      const event = resend.webhooks.verify({
        payload: req.body.toString(),
        headers: {
          id: req.headers['svix-id'],           // Note: short key names
          timestamp: req.headers['svix-timestamp'],
          signature: req.headers['svix-signature'],
        },
        webhookSecret: process.env.RESEND_WEBHOOK_SECRET  // whsec_xxxxx
      });

SKILL.md on GitHub