# Shopify Webhooks

## When to Use This Skill

* Setting up Shopify webhook handlers
* Debugging signature verification failures
* Understanding Shopify event types and payloads
* Handling order, product, or customer events

## Verification (core)

Shopify signs the raw body with HMAC-SHA256 keyed on the app's API secret and sends the digest in `X-Shopify-Hmac-SHA256` as base64 (not hex). Pass the raw body, decode base64, and compare timing-safe. The topic is in `X-Shopify-Topic`; the shop domain in `X-Shopify-Shop-Domain`.

Node:

```javascript
const crypto = require('crypto');

function verify(rawBody, hmacHeader, secret) {
  if (!hmacHeader) return false;
  const expected = crypto.createHmac('sha256', secret).update(rawBody).digest('base64');
  try {
    return crypto.timingSafeEqual(Buffer.from(hmacHeader), Buffer.from(expected));
  } catch {
    return false;
  }
}

```

Python:

```python
import hmac, hashlib, base64

def verify(raw_body: bytes, hmac_header: str, secret: str) -> bool:
    if not hmac_header:
        return False
    expected = base64.b64encode(
        hmac.new(secret.encode(), raw_body, hashlib.sha256).digest()
    ).decode()
    return hmac.compare_digest(hmac_header, expected)

```

> Important: Shopify requires the endpoint to respond with 200 within 5 seconds. Process work asynchronously if the handler is slow.

> For complete handlers with route wiring, event dispatch, and tests, see:
> 
> * [examples/express/](https://github.com/hookdeck/webhook-skills/tree/main/skills/shopify-webhooks/examples/express/)
> * [examples/nextjs/](https://github.com/hookdeck/webhook-skills/tree/main/skills/shopify-webhooks/examples/nextjs/)
> * [examples/fastapi/](https://github.com/hookdeck/webhook-skills/tree/main/skills/shopify-webhooks/examples/fastapi/)

## Common Event Types (Topics)

| Topic | Description |
| --- | --- |
| `orders/create` | New order placed |
| `orders/updated` | Order modified |
| `orders/paid` | Order payment received |
| `orders/fulfilled` | Order shipped |
| `products/create` | New product added |
| `products/update` | Product modified |
| `customers/create` | New customer registered |
| `app/uninstalled` | App removed from store |

> For full topic reference, see [Shopify Webhook Topics](https://shopify.dev/docs/api/admin-rest/current/resources/webhook)
> 
> Note: While the REST Admin API is becoming legacy for apps created after April 1, 2025, existing apps can continue using the REST API. New apps should consider using the [GraphQL Admin API](https://shopify.dev/docs/api/admin-graphql) for webhook management.

## Environment Variables

```bash
SHOPIFY_API_SECRET=your_api_secret   # From Shopify Partner dashboard or app settings

```

## Local Development

```bash
# Start tunnel (no account needed)
npx hookdeck-cli listen 3000 shopify --path /webhooks/shopify

```

## Reference Materials

* [references/overview.md](https://github.com/hookdeck/webhook-skills/blob/main/skills/shopify-webhooks/references/overview.md) - Shopify webhook concepts
* [references/setup.md](https://github.com/hookdeck/webhook-skills/blob/main/skills/shopify-webhooks/references/setup.md) - Configuration guide
* [references/verification.md](https://github.com/hookdeck/webhook-skills/blob/main/skills/shopify-webhooks/references/verification.md) - Signature verification details