Vapi MCP Server

Build AI voice assistants and phone agents with Vapi using the Model Context Protocol.

<a href="https://glama.ai/mcp/servers/@VapiAI/mcp-server">

</a>

Claude Code Setup (Recommended)

The easiest way to get started. No API key needed - authenticate via browser on first use.

1. Add MCP Server

claude mcp add vapi -- npx -y @vapi-ai/mcp-server

2. Install Skill (Optional)

The Vapi skill helps Claude guide you through building voice assistants:

mkdir -p ~/.claude/skills/vapi
curl -o ~/.claude/skills/vapi/SKILL.md https://raw.githubusercontent.com/VapiAI/mcp-server/main/skill/SKILL.md

3. Restart Claude Code

After restarting, use /vapi or ask Claude to help build a voice assistant. On first use, you'll be prompted to sign in via browser - no API key copy-paste needed.

---

Claude Desktop Setup

With OAuth (No API Key)

{
  "mcpServers": {
    "vapi": {
      "command": "npx",
      "args": ["-y", "@vapi-ai/mcp-server"]
    }
  }
}

With API Key

If you prefer to use an API key directly, get one from the Vapi dashboard:

{
  "mcpServers": {
    "vapi": {
      "command": "npx",
      "args": ["-y", "@vapi-ai/mcp-server"],
      "env": {
        "VAPI_TOKEN": "<your_vapi_token>"
      }
    }
  }
}

Remote Configuration

Connect to Vapi's hosted MCP server:

{
  "mcpServers": {
    "vapi": {
      "command": "npx",
      "args": [
        "mcp-remote",
        "https://mcp.vapi.ai/mcp",
        "--header",
        "Authorization: Bearer ${VAPI_TOKEN}"
      ],
      "env": {
        "VAPI_TOKEN": "<your_vapi_token>"
      }
    }
  }
}

---

Example Usage

Create a Voice Assistant

Ask Claude:

I want to build a voice assistant that can schedule appointments

Make an Outbound Call

Call +1234567890 using my appointment reminder assistant with these details:
- Customer name: Sarah Johnson
- Appointment date: March 25th
- Appointment time: 2:30 PM

Schedule a Future Call

Schedule a call with my support assistant for next Tuesday at 3:00 PM to +1555123456

---

Using Variable Values in Assistant Prompts

The create_call action supports passing dynamic variables through assistantOverrides.variableValues. Use double curly braces in your assistant's prompts: {{variableName}}.

Example Prompt with Variables

Hello {{customerName}}, this is a reminder about your appointment on {{appointmentDate}} at {{appointmentTime}} with {{doctorName}}.

Default Variables

These are automatically available (no need to pass):

- {{now}} - Current date and time (UTC)
- {{date}} - Current date (UTC)
- {{time}} - Current time (UTC)
- {{month}} - Current month (UTC)
- {{day}} - Current day of month (UTC)
- {{year}} - Current year (UTC)
- {{customer.number}} - Customer's phone number

See Vapi documentation for advanced date/time formatting.

---

Remote MCP Server

Connect to Vapi's hosted MCP server from any MCP client:

Streamable HTTP (Recommended)

- URL: https://mcp.vapi.ai/mcp
- Header: Authorization: Bearer your_vapi_api_key_here

SSE (Deprecated)

- URL: https://mcp.vapi.ai/sse
- Header: Authorization: Bearer your_vapi_api_key_here

---

Available Tools

Assistants

| Tool | Description | |------|-------------| | vapi_list_assistants | List all assistants | | vapi_get_assistant | Get assistant by ID | | vapi_create_assistant | Create new assistant | | vapi_update_assistant | Update assistant | | vapi_delete_assistant | Delete assistant |

Calls

| Tool | Description | |------|-------------| | vapi_list_calls | List call history | | vapi_get_call | Get call details | | vapi_create_call | Start outbound call (immediate or scheduled) |

Phone Numbers

| Tool | Description | |------|-------------| | vapi_list_phone_numbers | List phone numbers | | vapi_get_phone_number | Get phone number details | | vapi_buy_phone_number | Purchase new number | | vapi_update_phone_number | Update number settings | | vapi_delete_phone_number | Release number |

Tools (Function Calling)

| Tool | Description | |------|-------------| | vapi_list_tools | List custom tools | | vapi_get_tool | Get tool details | | vapi_create_tool | Create tool for API integration | | vapi_update_tool | Update tool | | vapi_delete_tool | Delete tool |

Authentication

| Tool | Description | |------|-------------| | vapi_login | Start OAuth flow | | vapi_logout | Log out and clear credentials |

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Development

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