home-assistant.io/source/_components/websocket_api.markdown
2019-04-03 10:39:06 -07:00

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---
layout: page
title: "Websocket API"
description: "Instructions on how to setup the WebSocket API within Home Assistant."
date: 2018-01-21 08:00
sidebar: true
comments: false
sharing: true
footer: true
logo: home-assistant.png
ha_category: "Other"
ha_qa_scale: internal
ha_release: 0.34
---
The `websocket_api` component set up a WebSocket API and allows one to interact with a Home Assistant instance that is running headless. This component depends on the [`http` component](/components/http/).
<p 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.
</p>
## {% linkable_title 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/) .
## {% linkable_title 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
```