> ## Documentation Index
> Fetch the complete documentation index at: https://docs.algovoi.co.uk/llms.txt
> Use this file to discover all available pages before exploring further.

# Notifications

> Slack, Discord, Teams, Telegram, Mattermost, Rocket.Chat, Google Chat, Zulip, generic webhook. Same retry stack behind every destination.

When a payment confirms on-chain, AlgoVoi can deliver the event to up to nine destinations per tenant.

## The nine destinations

| Logo        | Destination     | Type                        |
| ----------- | --------------- | --------------------------- |
| Slack       | Slack           | Block Kit message           |
| Discord     | Discord         | Embed                       |
| Teams       | Microsoft Teams | Adaptive Card               |
| Mattermost  | Mattermost      | Slack-compatible            |
| Rocket.Chat | Rocket.Chat     | Slack-compatible            |
| Google Chat | Google Chat     | Cards v2                    |
| Zulip       | Zulip           | Text message with topic     |
| Telegram    | Telegram        | `sendMessage` (per chat ID) |
| Webhook     | Generic webhook | Stripe-shaped JSON          |

Eight of these are designed for **ops humans** (a payment-team Slack channel, a finance-team Teams channel). One is the **machine destination**: the generic webhook posts a Stripe-shaped event to your own backend, signed with HMAC-SHA256.

## What's the same across destinations

Every destination shares the same delivery infrastructure:

* **Per-destination signing secret**, prefixed `algvw_…`, rotatable from the dashboard.
* **Auto-retry**: 30s, 2 min, 10 min, 1 h, 6 h, then dead-letter. Six attempts over about 32 hours.
* **Audit log** at `dash.algovoi.co.uk/notifications` showing every delivery attempt with status, attempt count, last HTTP code, last error, payload preview.
* **Manual retry**: the audit log has a "retry" button for failed deliveries.
* **At-least-once delivery**: receivers must dedupe on the event `id`.

## What's different

For chat-style destinations, AlgoVoi builds a human-readable message tailored to that destination's card format (Slack Block Kit, Teams Adaptive Card, etc.). For the generic webhook, AlgoVoi sends a [Stripe-shaped event JSON](/integrations/outbound-webhooks).

## Configuring destinations

In the dashboard go to **Settings → Notifications**. Add a destination:

* For Slack, paste an incoming-webhook URL.
* For Discord, paste a channel webhook URL.
* For Teams, paste a workflow URL.
* For Telegram, paste a bot token plus a chat ID.
* For the generic webhook, paste any HTTPS URL.

Each destination gets its own per-destination signing secret. Secrets are returned once, on creation, and stored as encrypted blobs in the database afterwards. Rotation generates a new secret and immediately invalidates the previous one.

## Same offer text everywhere

Adding a tenth destination is a one-file change in the gateway. The existing nine all share the same payload-builder dispatch table.

## Reliability

Notifier failures **never** block on-chain confirmation. The first delivery attempt fires inline at payment confirmation (typically sub-second), but if it fails, the customer-facing 200 response is unaffected. The retry queue picks up failed deliveries on a 30-second tick.

## See also

* [Outbound webhooks](/integrations/outbound-webhooks) for the generic-webhook payload schema
* [Quickstart](/quickstart) for setting up your first webhook