---
title: "List Voices"
description: "List the text-to-speech voices available to a voice agent."
---

> Documentation Index
> Fetch the complete documentation index at: https://docs.speakai.co/llms.txt
> Use this file to discover all available pages before exploring further.

# List Voices

Use the Speak AI MCP server tool `list_voices` to list the text-to-speech voices
available to a voice agent.

## What does it do?

List the text-to-speech voices available to a voice agent. Use the returned
provider/voiceId with `create_voice_agent` or `update_voice_agent`'s voice field.
When an agent's llm.model is a Live (speech-to-speech) model, its usable voices are
a fixed, smaller set scoped to that model instead of this full catalog.

## Parameters

`list_voices` takes no parameters.

## Behaviour

The Speak AI MCP server publishes these behaviour hints for `list_voices`.

- Only reads data. Does not modify your workspace.
- Does not delete or overwrite existing data.
- Repeating an identical call is safe.
- Stays inside Speak AI. Does not reach other systems.

## Related

- [Voice agents](/mcp/tools/voice-agents/) lists the rest of the Voice agents
  category.
- [Tool reference](/mcp/tools/) lists every Speak AI MCP server tool.
- [MCP server](/mcp/) covers setup, supported clients, and what agents can do once
  connected.

Source: https://docs.speakai.co/mcp/tools/voice-agents/list_voices/index.mdx