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

# About Click To Call

> Overview of Click To Call, a voice AI widget and SDK that lets end users start a voice conversation with an AI Agent in one click.

[Added in 2026.6](https://docs-classic.cognigy.com/release-notes/2026.6.md)

*Click To Call* lets you create a voice AI Agent that end users can talk to with a single click.

You can deploy Click To Call through the following options:

* **Click To Call Widget** — you can easily embed a widget into your website. Additionally, you can use the Click To Call [Widget API and CSS styles](https://github.com/Cognigy/click-to-call-widget) to customize your AI Agent.
* **Click To Call SDK** — you can build a custom application using the Click To Call [SDK](https://github.com/Cognigy/click-to-call-sdk).

<video width="650" height="400" controls title="Click To Call SDK showing call flow" aria-label="Click To Call demo showing a user clicking the Click To Call widget and having a conversation with the AI Agent">
  <source src="https://docscognigyassets.blob.core.windows.net/assets/click-to-call.mp4" />
</video>

## Key Benefits

* **Optimized latency and high definition audio quality**. The underlying web real-time communication (WebRTC) protocol and Opus codec allow for low-latency and higher quality audio communication.
* **Multimodal communication**. Users can communicate primarily through voice with the AI Agent, but you can extend the capabilities of your voice AI Agents with [event handling and API methods](https://github.com/Cognigy/click-to-call-widget).
* **Centralized entry point**. Users can access your voice AI Agent directly through the widget while browsing through your website without the need to call a phone number.
* **Swift voice communication**. Users can start a conversation with your voice AI Agent with just one click.
* **Transfer calls**. The Click To Call widget supports [Dial call transfers](https://docs-classic.cognigy.com/ai/agents/develop/node-reference/voice/voice-gateway/transfer.md). This way, you can transfer the call to a human agent or a contact center.
* **Fully customizable**. You can customize the Click To Call widget with the CSS styles in the [Click To Call widget GitHub repository](https://github.com/Cognigy/click-to-call-widget) to match your brand or build a custom application using the [Click To Call SDK](https://github.com/Cognigy/click-to-call-sdk).

## How to Start with Click To Call

Start by reading the following articles and seeing what Click To Call is capable of:

* [Quickstart: Set up Your First Click To Call Widget](https://docs-classic.cognigy.com/click-to-call/quickstart.md)
* [Configure the Click To Call Widget](https://docs-classic.cognigy.com/click-to-call/configure.md)
* [Embed the Click To Call Widget in Your Website](https://docs-classic.cognigy.com/click-to-call/embed.md)

## More Information

* [Voice Gateway Endpoint](https://docs-classic.cognigy.com/ai/agents/deploy/endpoint-reference/voice-gateway.md)
* [Voice Gateway Self-Service Portal](https://docs-classic.cognigy.com/voice-gateway/webapp/overview)
* [Tutorials](https://docs-classic.cognigy.com/click-to-call/tutorials/overview.md)


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