ElevenLabs Moss Integration

Moss delivers sub-10ms semantic retrieval, giving your ElevenLabs Conversational AI agents instant access to a knowledge base during live voice conversations.

Installation

pip install elevenlabs-moss

Prerequisites

• Moss project ID and project key (get them from Moss Portal)
• ElevenLabs API key and a Conversational AI agent ID (get them from ElevenLabs)

Usage

import asyncio
import os

from elevenlabs import ElevenLabs
from elevenlabs.conversational_ai.conversation import ClientTools, Conversation
from elevenlabs.conversational_ai.default_audio_interface import DefaultAudioInterface
from elevenlabs_moss import MossClientTool

async def main():
    # Create and load the Moss tool
    moss_tool = MossClientTool(
        project_id=os.getenv("MOSS_PROJECT_ID"),
        project_key=os.getenv("MOSS_PROJECT_KEY"),
        index_name=os.getenv("MOSS_INDEX_NAME"),
    )
    await moss_tool.load_index()

    # Register with ElevenLabs ClientTools
    client_tools = ClientTools()
    moss_tool.register(client_tools)

    # Start the conversation
    conversation = Conversation(
        client=ElevenLabs(api_key=os.getenv("ELEVENLABS_API_KEY")),
        agent_id=os.getenv("ELEVENLABS_AGENT_ID"),
        requires_auth=False,
        audio_interface=DefaultAudioInterface(),
        client_tools=client_tools,
    )
    conversation.start_session()
    await asyncio.to_thread(conversation.wait_for_session_end)

asyncio.run(main())

For a complete voice agent demo, see apps/elevenlabs-moss/.

ElevenLabs Dashboard Setup

Your ElevenLabs agent must have a client tool configured that matches the tool name used in code. In the ElevenLabs dashboard:

1. Open your agent's settings
2. Go to Tools and add a new Client tool
3. Set Tool name to search_knowledge_base (case-sensitive)
4. Add a parameter: name = query, type = string, required = true
5. Set the parameter description to: "The user's question to search the knowledge base for"
6. Enable Wait for response so the tool output is fed back into the conversation

To use a different tool name, pass tool_name="your_name" to MossClientTool and update the dashboard to match.

Configuration Options

MossClientTool

Methods

License

This integration is provided under the BSD 2-Clause License.

Support

• Moss Docs
• Moss Discord
• ElevenLabs Docs