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 lists the rest of the Voice agents category.
- Tool reference lists every Speak AI MCP server tool.
- MCP server covers setup, supported clients, and what agents can do once connected.