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authentik/website/docs/api/websocket.md

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---
title: Websocket API
---
authentik has two different WebSocket endpoints, one is used for web-based clients to get real-time updates, and the other is used for outposts to report their healthiness.
### Web `/ws/client/`
:::info
Authentication is done using the session, so make sure to send the `Cookie` header.
:::
All messages have a common field called `message_type` to discern the type of message.
#### `message` type:
This type is used when the backend has a notice to show to the user. A full payload looks like:
```json
{
"message_type": "message",
"level": "error" | "warning" | "success" | "info",
"tags": "",
"message": "a message",
}
```
### Outpost `/ws/outpost/<outpost-uuid>/`
:::info
Authentication is done via the `Authorization` header, same as the regular API. You must send a valid token with a `Bearer ` prefix.
:::
All messages have two fields, `instruction` and `args`. Instruction is any number from this list:
- `0`: ACK, simply acknowledges the previous message
- `1`: HELLO, used for monitoring and regularly sent by outposts
- `2`: TRIGGER_UPDATE, sent by authentik to trigger a reload of the configuration
Arguments for these messages vary, all though these common args are always sent:
- `args['uuid']`: A unique UUID generated on startup of an outpost, used to uniquely identify it.
These fields are only sent for HELLO instructions:
- `args['version']`: Version of the outpost
- `args['buildHash']`: Build hash of the outpost, when available