ElevenLabs Voice-to-Voice Agent
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| LLM_PROVIDER | No | LLM provider: 'anthropic' (default) or 'openai' | anthropic |
| OPENAI_API_KEY | No | OpenAI API key (required if using OpenAI) | |
| ANTHROPIC_API_KEY | No | Anthropic API key (required if using Anthropic) | |
| ELEVENLABS_API_KEY | Yes | ElevenLabs API key (required) | |
| ELEVENLABS_OUTPUT_DIR | No | Directory for output MP3 files (defaults to current working directory) |
Capabilities
Features and capabilities supported by this server
| Capability | Details |
|---|---|
| tools | {
"listChanged": true
} |
| prompts | {
"listChanged": true
} |
| resources | {
"listChanged": true
} |
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| list_voicesA | List all voices available in ElevenLabs. Returns voice IDs, names, and labels. |
| get_voiceA | Get detailed information about a specific ElevenLabs voice by its ID. |
| list_modelsA | List all available ElevenLabs TTS models with their capabilities and supported languages. |
| text_to_speechA | Convert text to speech using ElevenLabs. Saves the audio as an MP3 file and returns the file path. |
| speech_to_textA | Transcribe an audio file to text using ElevenLabs Speech-to-Text (scribe_v1). Supports WAV, MP3, and other common formats. |
| get_user_infoA | Get the current ElevenLabs user/subscription info including character usage and limits. |
| get_historyB | Retrieve the history of TTS generations from ElevenLabs. |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
| voice_agent_persona | Create a voice AI agent with a specific persona. The agent picks a matching ElevenLabs voice and speaks every response aloud via text_to_speech. |
| start_voice_session | Initialize a live voice conversation. The agent listens via speech_to_text and responds aloud via text_to_speech in a continuous loop. |
| find_voice_for_role | Analyze available voices and recommend the best matches for a specific use case, with audio samples for each. |
| voice_showcase | Render the same phrase in multiple different ElevenLabs voices for side-by-side comparison. |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
| voices | Live list of all ElevenLabs voices with IDs, categories, and labels. Read this before calling text_to_speech to pick the right voice. |
| models | Available ElevenLabs TTS and STT models with capabilities and supported languages. |
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