A comprehensive toolkit for building, configuring, and managing AI-powered voice agents across multiple telephony providers.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install voice-agent-builder
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install voice-agent-builder using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is Voice Agent Builder?
The Voice Agent Builder is a versatile toolset designed to simplify the deployment of AI-driven voice assistants. It serves as a bridge between powerful LLMs and voice platforms like Vapi, Bland.ai, and Retell. By integrating this into your Openclaw Skills library, you can programmatically manage agent personalities, select high-quality TTS providers like ElevenLabs, and automate complex telephony workflows.
This skill is particularly valuable for developers looking to build low-latency voice applications that can handle natural conversation nuances. It abstracts the complexities of different provider APIs into a unified set of CLI commands, allowing for rapid prototyping and scaling of voice-first automation strategies.
Voice Agent Builder Use Cases
- Building automated appointment setters and reminders
- Creating sophisticated IVR systems for customer support
- Executing high-volume outbound lead qualification calls
- Implementing voice-based RAG for querying documentation over the phone
- Integrating voice interactions with CRMs for real-time lead updates
How Voice Agent Builder Works
- Set up the environment with required API keys such as the VAPI_API_KEY.
- Define the agent configuration, including voice identity, model parameters (like GPT-4o), and specific system prompts.
- Provision or import phone numbers to the platform using the provided CLI scripts.
- Launch outbound calls or configure inbound handlers to initiate the voice AI interaction.
- Capture transcripts and call data for integration with external databases or workflow automation tools.
Voice Agent Builder Setup
To begin using this skill, ensure you have Python 3.10+ installed and set your environment variables:
export VAPI_API_KEY="your-vapi-api-key"
You can then interact with the agent scripts directly:
# Create an agent
python3 scripts/vapi_agent.py create-agent '{"name":"Agent Name", "voice": {"provider": "11labs"}}'
# Initiate a call
python3 scripts/vapi_agent.py call '{"assistantId":"id", "customer":{"number":"+15551234567"}}'
Voice Agent Builder Data Schema & Taxonomy
The system manages data across several key entities to ensure consistent voice performance:
| Component | Details |
|---|---|
| Agent Profile | Contains the system prompt, first message, and voice provider settings. |
| Call Logs | Includes data on duration, cost, recording URLs, and conversation transcripts. |
| Phone Config | Maps specific phone numbers to assistant IDs for inbound call routing. |
| Knowledge Base | Stores uploaded files (PDF/Text) used for RAG during voice sessions. |
Voice Agent Builder Advanced Features
- Support for multiple TTS providers including ElevenLabs, PlayHT, and Deepgram
- Built-in platform comparison to choose between Vapi, Bland.ai, and Retell based on latency and cost
- Advanced function calling capabilities for real-time external API interactions during calls
- Native Knowledge Base integration for context-aware RAG voice responses
- Seamless webhook support for CRM and ERP automation hooks using Openclaw Skills architecture
SKILL.md
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