Build conversational AI voice agents on the ElevenLabs platform. Configure agent + tools + knowledge base, integrate SDK (React / React Native / Swift / JS / server-side), test, deploy. Use whenever the user mentions ElevenLabs, building a voice agent, an AI phone system, an AI
Installs just this skill. Get the whole plugin for auto-invocation.
⚡ How it fires
How this skill gets triggered: by you, by Claude, or both.
Fires itselfClaude auto-loads it when your prompt matches the work.
You can call itInvoke it directly when you want it.
Slash command/elevenlabs-agents
👁️ Context preview
The summary Claude sees to decide when to auto-load this skill.
Build conversational AI voice agents on the ElevenLabs platform. Configure agent + tools + knowledge base, integrate SDK (React / React Native / Swift / JS / server-side), test, deploy. Use whenever the user mentions ElevenLabs, building a voice agent, an AI phone system, an AI
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LanguagePython
LicenseMIT
📦 Ships with jezweb-skills
</> SKILL.md
elevenlabs-agents.SKILL.md
---name: elevenlabs-agents
description: "Build conversational AI voice agents on the ElevenLabs platform. Configure agent + tools + knowledge base, integrate SDK (React / React Native / Swift / JS / server-side), test, deploy. Use whenever the user mentions ElevenLabs, building a voice agent, an AI phone system, an AI receptionist, conversational AI, or troubleshooting deprecated @11labs packages, webhook errors, CSP violations, localhost allowlist, or tool parsing errors."
compatibility: claude-code-only
---# ElevenLabs Agent Builder
Build a production-ready conversational AI voice agent. Produces a configured agent with tools, knowledge base, and SDK integration.
## Packages
```bash
npm install @elevenlabs/react # React SDK
npm install @elevenlabs/client # JavaScript SDK (browser + server)
npm install @elevenlabs/react-native # React Native SDK
npm install @elevenlabs/elevenlabs-js # Full API (server only)
npm install -g @elevenlabs/agents-cli # CLI ("Agents as Code")
```
**DEPRECATED:** `@11labs/react`, `@11labs/client` -- uninstall if present.
**Server-only warning:** `@elevenlabs/elevenlabs-js` uses Node.js `child_process` and won't work in browsers. Use `@elevenlabs/client` for browser environments, or create a proxy server.
## Workflow
### Step 1: Create Agent via Dashboard or CLI
Use `{{secret__key_name}}` for API keys in webhook headers -- never hardcode.
**MCP Tools -- CRITICAL COMPATIBILITY NOTE:**
ElevenLabs labels their MCP integration as "Streamable HTTP" but does NOT support the actual MCP 2025-03-26 Streamable HTTP spec (SSE responses). ElevenLabs expects:
- Plain JSON responses (`application/json`), NOT SSE (`text/event-stream`)
- Protocol version `2024-11-05`, NOT `2025-03-26`
- Simple JSON-RPC over HTTP with direct JSON responses
What does NOT work:
- Official MCP SDK's `createMcpHandler` (returns SSE)
Model lineups and pricing rot fast — check the live list in the ElevenLabs dashboard (Agent → LLM dropdown) or docs before picking, and don't hardcode a model id you haven't verified this session. The durable picks: a current cheap-fast model for most agents (upgrade only where quality demands it), a long-context model when the knowledge base is large.
Key savings:
- **LLM caching**: up to 90% on repeated prompts (enable in config)
- **Prompt length**: 150 tokens > 500 tokens for same instructions
- **RAG over context**: use knowledge base instead of stuffing system prompt
- **Duration limits**: set `max_duration_seconds` to prevent runaway conversations
