> [!CAUTION]
> **Caution:** This documentation is for Google Ads API **v24** . The latest active version is [**v26**](https://developers.google.com/google-ads/api/reference/rpc/latest/MerchantCenterIdentifier).

The identifier for Google Merchant Center account

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v24/resources/product_link.proto)

| Fields ||
|---|---|
| ## `merchant_center_id` | `int64` Immutable. The customer ID of the Google Merchant Center account. This field is required and should not be empty when creating a new Merchant Center link. It is unable to be modified after the creation of the link. |