---
title: productId
framework: appstoreserverapi
role: symbol
role_heading: Type
path: appstoreserverapi/productid
---

# productId

The unique identifier of the product.

## Declaration

```data
string productId
```

## Mentioned in

Extending the renewal date for auto-renewable subscriptions

## Discussion

Discussion You define product IDs in App Store Connect. Product IDs are unique within your app.

## See Also

### Product information

- [type](appstoreserverapi/type.md)
- [subscriptionGroupIdentifier](appstoreserverapi/subscriptiongroupidentifier.md)
- [quantity](appstoreserverapi/quantity.md)