> For a complete page index, fetch https://developer.close.com/llms.txt

# WhatsApp Messages API

We have added support for
[WhatsApp Messages](https://developer.close.com/api/resources/activities/whatsapp/list) as a new activity
type. This allows integration partners to sync WhatsApp messages into Close,
enabling viewing of ongoing WhatsApp conversations within the CRM.

**Important:** WhatsApp messages can only be synced into Close for viewing and
tracking purposes. Close does not send WhatsApp messages directly - actual
sending must be done through WhatsApp apps or other third-party WhatsApp
platforms.

The new API includes:

- Support for syncing inbound and outbound WhatsApp messages
- File attachment capabilities (up to 25MB total per message)
- Integration links to connect back to external systems
- Thread support via the `response_to_id` field to track message replies

We also introduced new events `activity.whatsapp_message.created`,
`activity.whatsapp_message.updated`, and `activity.whatsapp_message.deleted`,
which you can subscribe to using
[webhooks](/api/resources/events).