home-assistant.io/source/_integrations/websocket_api.markdown
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Update websocket_api.markdown (#13218)
Corrected spelling of "Assistant" in the title of the page.  My first direct, if meaningless, contribution to the Home Assistant project
2020-04-30 16:19:14 +02:00

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---
title: Home Assistant WebSocket API
description: Instructions on how to setup the WebSocket API within Home Assistant.
ha_category:
- Other
ha_release: 0.34
ha_quality_scale: internal
ha_codeowners:
- '@home-assistant/core'
ha_domain: websocket_api
---
The `websocket_api` integration set up a WebSocket API and allows one to interact with a Home Assistant instance that is running headless. This integration depends on the [`http` component](/integrations/http/).
<div class='note warning'>
It is HIGHLY recommended that you set the `api_password`, especially if you are planning to expose your installation to the internet.
</div>
## Configuration
```yaml
# Example configuration.yaml entry
websocket_api:
```
For details to use the WebSocket API, please refer to the [WebSocket API documentation](/developers/websocket_api/) .
## Track current connections
The websocket API provides a sensor that will keep track of the number of current connected clients. You can add it by adding the following to your configuration:
```yaml
# Example configuration.yaml entry
sensor:
platform: websocket_api
```