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Voice Agent Builder
by
aiwithabidi
· GitHub ↗
· v1.0.0
282
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Install in OpenClaw
/install voice-agent-builder
Description
Build and manage Voice AI agents using Vapi, Bland.ai, or Retell. Create agents, configure voices, set prompts, make outbound calls, and retrieve transcripts...
Usage Guidance
This skill appears to do what it says: it wraps the Vapi API and needs your VAPI_API_KEY to manage agents and make calls. Before installing, verify you trust the Vapi service and the skill author/site (agxntsix.ai); treat VAPI_API_KEY as highly sensitive (it can create calls and access transcripts). Avoid pasting third-party secrets (Twilio SID/AuthToken, etc.) on shared shells or in command history — pass them securely. Review Vapi account permissions, expected billing for outbound calls, and privacy implications (call transcripts may contain PII). If unsure, run the script in an isolated environment and inspect network traffic to api.vapi.ai.
Capability Analysis
Type: OpenClaw Skill
Name: voice-agent-builder
Version: 1.0.0
The voice-agent-builder skill is a legitimate tool for managing Voice AI agents via the Vapi.ai API. The core logic in scripts/vapi_agent.py implements standard API interactions (CRUD for agents, calls, and phone numbers) using Python's built-in urllib. The documentation in SKILL.md and scripts/voice_comparison.md is consistent with the provided functionality, and no evidence of data exfiltration, malicious execution, or harmful prompt injection was found.
Capability Assessment
Purpose & Capability
Name/description (build/manage voice agents for Vapi/Bland.ai/Retell) align with the included files and requirements. The only required environment variable is VAPI_API_KEY, which the provided vapi_agent.py uses to call https://api.vapi.ai — this is proportional to the stated purpose.
Instruction Scope
SKILL.md instructs running the included Python CLI which only calls the Vapi API. It does instruct users to pass third-party credentials (e.g., Twilio SID/AuthToken) in JSON payloads when importing numbers — that is expected for phone import but is sensitive. The instructions do not request unrelated files, system config, or hidden endpoints.
Install Mechanism
No install spec; this is instruction-only plus a small Python script. No external downloads or archives are executed or written to disk by an installer, which reduces risk.
Credentials
Only VAPI_API_KEY is declared and used. That is appropriate for a wrapper that controls Vapi resources (agents, calls, transcripts) but is powerful — possession of the key allows creating calls and retrieving transcripts, so users should limit its scope and treat it as sensitive. The skill does not require other unrelated credentials.
Persistence & Privilege
Skill is not always-enabled and uses normal autonomous invocation defaults. It does not modify other skills or system configuration and has no persistent install steps.
How to Use
- Make sure OpenClaw is installed (local or Docker)
- Run the install command in chat:
/install voice-agent-builder - After installation, invoke the skill by name or use
/voice-agent-builder - Provide required inputs per the skill's parameter spec and get structured output
Version History
v1.0.0
- Initial release of voice-agent-builder.
- Build and manage Voice AI agents across Vapi, Bland.ai, and Retell platforms.
- Supports agent creation, prompt configuration, voice selection, outbound calling, and transcript retrieval.
- Includes detailed platform comparison guide and best-practice prompt engineering tips.
- Offers integration workflows for CRM, calendar booking, and RAG knowledge bases.
- Command-line interface for all key agent and call management operations.
Metadata
Frequently Asked Questions
What is Voice Agent Builder?
Build and manage Voice AI agents using Vapi, Bland.ai, or Retell. Create agents, configure voices, set prompts, make outbound calls, and retrieve transcripts... It is an AI Agent Skill for Claude Code / OpenClaw, with 282 downloads so far.
How do I install Voice Agent Builder?
Run "/install voice-agent-builder" in the OpenClaw or Claude Code chat to install it in one step — no extra setup required.
Is Voice Agent Builder free?
Yes, Voice Agent Builder is completely free (open-source). You can download, install and use it at no cost.
Which platforms does Voice Agent Builder support?
Voice Agent Builder is cross-platform and runs anywhere OpenClaw / Claude Code is available (cross-platform).
Who created Voice Agent Builder?
It is built and maintained by aiwithabidi (@aiwithabidi); the current version is v1.0.0.
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