# Webhook Events

> Reference list of webhook event types emitted by the Activation API, Retail API, and Alternative API.


## Webhook Event Types

| Category    | Event Type                                                                                                                                                                                           | Description                                                      |
| ----------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------- |
| Activation  | [account.low_balance](https://platfone.com/docs/api/specs/activation-api-doc.html#tag/Webhooks/operation/accountLowBalanceWebhook)
                        | Notifies when an account (merchant) balance is low.              |
| Activation  | [activation.updated](https://platfone.com/docs/api/specs/activation-api-doc.html#tag/Webhooks/operation/activationUpdatedWebhook)
                         | Issued when a activation `sms_status` changes.                   |
| Activation  | [activation_report.updated](https://platfone.com/docs/api/specs/activation-api-doc.html#tag/Webhooks/operation/activationReportUpdatedWebhook)
            | Issued when an activation `report_status`changes.                |
| Retail      | [customer.low_balance](https://platfone.com/docs/api/specs/retail-api-doc.html#tag/Webhooks/operation/customerLowBalanceWebhook)
                          | Notifies when a customer's balance is below a defined threshold. |
| Retail      | [customer.updated](https://platfone.com/docs/api/specs/retail-api-doc.html#tag/Webhooks/operation/customerUpdatedWebhook)
                                 | Sent when a customer's status is updated.                        |
| Retail      | [customer.activation.updated](https://platfone.com/docs/api/specs/retail-api-doc.html#tag/Webhooks/operation/activationUpdatedWebhook)
                    | Issued when a customer's activation `sms_status` changes.        |
| Retail      | [customer.activation_report.updated](https://platfone.com/docs/api/specs/retail-api-doc.html#tag/Webhooks/operation/activationReportUpdatedWebhook)
       | Issued when an activation `report_status`changes.                |
| Alternative | [alternative.activation.updated](https://platfone.com/docs/api/specs/alternative-api-doc.html#tag/Webhooks/operation/alternativeActivationUpdatedWebhook)
 | Sent when an alternative activation's `sms_status` changes.      |

Each event type has a corresponding `data` object, which provides event-specific details.