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# Keeping Tokens and Metadata Up-to-Date

### Keeping Tokens and Meta-data Up-to-Date Through Notifications

**Merchants to Amex Flow**

All Merchants must use the `/notifications` API to notify AMEX when a Card is removed from a Customer's shopping account, and AMEX will update the token status accordingly.

**AMEX to Merchants Flow**

Using AETS, Merchants can stay up-to-date with the latest token status and Card meta-data updates. Token and meta-data notifications are received automatically through webhooks and/or on-demand through our API:

**Delivery Method** **Description** Automatically via webhooks (recommended) It is encouraged to receive notifications via webhooks as AMEX will automatically send a notification of the meta-data or token status updates as they occur. To receive notifications, simply provide the webhook URL on the American Express Developers Portal. On-demand via API Request the latest token meta-data or status using the `/metadata` or `/status` endpoints respectively.