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现有 Merchant Center 账号 - 现有账号关联
请务必允许商家根据需要使用其现有的 Merchant Center 帐号。此账号包含大量历史数据,有望简化新手入门流程(例如,此账号已通过政策审批)。
用户体验指南
在两种情况下,商家已经拥有 Merchant Center 帐号。
情景 1:他们已经有 1 个帐号:

已关联的账号:

已创建并关联帐号:

情景 2:他们有多个现有帐号:

从下拉菜单中选择,然后点击“连接”:

已关联的账号:

已创建并关联帐号:

技术指南
如果您的商家已有要使用的 Merchant Center 账号,请按照以下步骤成功使用其账号:
确定 Merchant Center 帐号:使用 Content API 端点 account.authinfo
与商家 Google 帐号的 OAuth 凭据,以显示与该商家的 Google 帐号相关联的 MC 帐号。
存储数据:确保存储 Merchant 子账号详细信息
不属于您的 MCA 的现有账号:该 Merchant Center 账号将不会是您的 MCA 的子账号。这些客户可能属于其他 MCA,但仍连接到您的集成。
帐号关联:您应使用 account.link
将您的 MCA 与商家的现有帐号相关联。您只能使用 OAuth 通过 Content API 管理商家 Merchant Center 账号。注意:如需详细了解帐号关联(帐号举报),请点击此处本指南。
覆盖现有数据:我们建议您通过关联商家现有的 Merchant Center 账号来通知商家,因为商家的商品数据和现有设置将会被覆盖。
如未另行说明,那么本页面中的内容已根据知识共享署名 4.0 许可获得了许可,并且代码示例已根据 Apache 2.0 许可获得了许可。有关详情,请参阅 Google 开发者网站政策。Java 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC):2025-07-25。
[null,null,["最后更新时间 (UTC):2025-07-25。"],[[["\u003cp\u003eMerchants can connect their existing Google Merchant Center account to streamline onboarding and leverage historical data.\u003c/p\u003e\n"],["\u003cp\u003eTwo scenarios are outlined for merchants with single or multiple existing accounts, providing visual guidance for account connection.\u003c/p\u003e\n"],["\u003cp\u003eTechnical guidance includes identifying the Merchant Center account, storing data, linking accounts, and understanding implications for existing data.\u003c/p\u003e\n"],["\u003cp\u003eUtilizing the Content API, developers can facilitate account connections and manage merchant accounts efficiently.\u003c/p\u003e\n"],["\u003cp\u003eMerchants should be informed that connecting an existing account may overwrite existing product data and settings.\u003c/p\u003e\n"]]],["Merchants can utilize their existing Merchant Center accounts, which may expedite onboarding due to pre-existing data and policy approvals. To enable this, use the `account.authinfo` API endpoint to identify the merchant's associated account and store the sub-account details. Linking the merchant's account to your MCA is done via the `account.link` API. Note that these accounts won't be sub-accounts of your MCA. Merchants should be informed that connecting an existing account will overwrite existing data.\n"],null,["Existing Merchant Center Account - Existing Account Connection\n--------------------------------------------------------------\n\nIt is imperative to allow your merchants to use their existing Merchant Center account if they choose to. This account has a lot of historic data and can potentially make the onboarding easier (for example, account has been policy approved already).\n\n### UX Guidance\n\n*** ** * ** ***\n\nThere could be two scenarios in which a merchant already has an existing Merchant Center Account.\n\n**Scenario #1. They have one existing account:**\n\nAccount connected:\n\nAccount created and connected:\n\n**Scenario #2. They have multiple existing accounts:**\n\nSelect from drop-down and click \"connect\":\n\nAccount connected:\n\nAccount created and connected:\n\n### Tech Guidance\n\n*** ** * ** ***\n\nIf your merchant already has an existing Merchant Center Account they want to use, follow these steps to successfully use their account:\n\n1. Identifying the Merchant Center account: Use the content API endpoint [`account.authinfo`](https://developers.google.com/shopping-content/reference/rest/v2.1/accounts/authinfo) with the OAuth credentials of the Google Account of the merchant to display the MC account associated with the Merchant's Google Account.\n\n2. Storing Data: Make sure to store the Merchant sub-account details\n\n3. Existing Not part of your MCA: The MC account will not be a sub-account of your MCA. It is possible for them to be part of a different MCA and still connect to your integration.\n\n4. Account linking: You should use [`account.link`](https://developers.google.com/shopping-content/reference/rest/v2.1/accounts/link) to link your MCA to the merchant's existing accounts. You will manage the merchant MC account only via the content API using OAuth. Note: More information on account linking (account flagging) can be found [here](/merchant/storebuilder/online/sections/1_3_account_linking) within this guide.\n\n5. Overwriting existing data: We recommend notifying your merchants by connecting their existing Merchant Center account, their product data and existing settings will be overwritten."]]