# Inject User

Voice Agent

The `InjectUserMessage` is a JSON message you can send to the agent to interact with the agent using text. This is useful when you need to trigger an agent response from text input.

## Purpose

The `InjectUserMessage` message provides a way to have the agent "hear" something without the user actually speaking it. The agent will respond as if the user had spoken the message.

## Example Payloads

To send the `InjectUserMessage` message, you need to send the following JSON message to the server:

**`JSON`**

```json JSON
{
  "type": "InjectUserMessage",
  "content": "" // The text phrase or statement the agent should listen for
}
```

## Use Cases

Some common ways to use the `InjectUserMessage` are:

- A user using a chat or text interface to interact with an agent.
- Automated testing of an agent where text is used to trigger an agent response.

## Related pages

- [Inputs: Client Messages](./self-hosted-deployments-3-voice-agent-inputs.md)
- [Settings](./self-hosted-deployments-3-voice-agent-settings.md)
- [Update Listen](./self-hosted-deployments-3-voice-agent-update-listen.md)
- [Update Think](./self-hosted-deployments-3-voice-agent-update-think.md)
- [Update Speak](./self-hosted-deployments-3-voice-agent-update-speak.md)
- [Update Prompt](./self-hosted-deployments-3-voice-agent-update-prompt.md)
- [Inject Agent](./self-hosted-deployments-3-voice-agent-inject-agent-message.md)
- [Force End Turn](./self-hosted-deployments-3-voice-agent-force-end-turn.md)
- [Agent Keep Alive](./self-hosted-deployments-3-agent-keep-alive.md)

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