What tools does Vapi MCP Server provide?
It provides tools for assistants, calls, phone numbers, custom tools, and authentication – over 15 actions including create, read, update, delete, and login/logout.
Vapi MCP Server
@VapiAI
Basic information
About Vapi MCP Server
Vapi MCP Server
Vapi MCP Server config
Add this server to your MCP-compatible client using the configuration below.
{
"mcpServers": {
"vapi": {
"command": "npx",
"args": [
"-y",
"@vapi-ai/mcp-server"
]
}
}
}Vapi MCP Server tools
Tool list not available yet
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Fetch the live tool list by running this server in a temporary sandbox using the button above.
Overview
What is Vapi MCP Server?
Vapi MCP Server lets you build AI voice assistants and phone agents with Vapi using the Model Context Protocol. It is for developers who want to create, manage, and call voice assistants directly from MCP‑compatible clients like Claude Code or Claude Desktop.
How to use Vapi MCP Server?
Install via npx and add to your MCP client configuration. For Claude Code, run claude mcp add vapi -- npx -y @vapi-ai/mcp-server and authenticate via browser on first use. For Claude Desktop, add the server to mcpServers in claude_desktop_config.json using either OAuth (no API key) or a VAPI_TOKEN environment variable from the Vapi dashboard. A remote configuration is also available.
Key features of Vapi MCP Server
- Full CRUD for assistants, calls, and phone numbers
- Outbound calling (immediate or scheduled)
- Custom tool creation for API integration
- Dynamic variable substitution in assistant prompts
- OAuth login and logout for authentication
- Remote MCP server via Streamable HTTP or SSE
Use cases of Vapi MCP Server
- Create a voice assistant that can schedule appointments
- Make an outbound call to a customer with appointment reminders
- Schedule a future call with a support assistant
- Manage phone numbers (buy, update, release)
- Build and test voice‑agent workflows from Claude
Frequently asked questions
How do I authenticate with Vapi MCP Server?
You can use OAuth (browser login, no API key needed) or a Vapi API key via the `VAPI_TOKEN` environment variable. For remote access, pass the token as a Bearer token in the Authorization header.
Can I use variable values in assistant prompts?
Yes. Use double curly braces like `{{customerName}}` in your assistant prompts and pass values via `assistantOverrides.variableValues` when creating a call. Several default variables (`{{now}}`, `{{date}}`, `{{customer.number}}`, etc.) are automatically available.
Where is data stored?
Data (assistants, calls, phone numbers) lives in your Vapi account. The server acts as a stateless MCP bridge and does not store data locally.
What transports are supported?
Local use runs over stdio. For remote clients, Streamable HTTP (recommended) and SSE (deprecated) are supported at `https://mcp.vapi.ai/mcp` and `https://mcp.vapi.ai/sse` respectively.
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