What can you do with this server?

The Vapi MCP Server enables integration with Vapi APIs through the Model Context Protocol for managing: * Assistants: List, create, update, and retrieve assistants with customizable LLM, voice, transcriber, and first message configurations. * Calls: List, create, and retrieve calls, including scheduling outbound calls for immediate or future execution. * Phone Numbers: List and retrieve Vapi phone numbers. * Tools: List and retrieve Vapi tools. * Remote Connectivity: Connect to the server remotely using Server-Sent Events (SSE) for seamless integration. * Development & Testing: Supports local development with unit and end-to-end tests.

Which integrations are available for this server?

Allows the MCP server to be installed and run via NPX, making it easy to integrate Vapi's capabilities through the NPM package ecosystem.

How do I use Vapi MCP Server?

1. Click on "Install Server". 2. Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state. 3. In the chat, type @ followed by the MCP server name and your instructions, e.g., "@Vapi MCP Server call my appointment reminder assistant to schedule a follow-up for next week" That's it! The server will respond to your query, and you can continue using it as needed. Here is a step-by-step guide with screenshots.

Vapi MCP Server

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

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.

Related MCP server: MCP Server

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

Development

# Install dependencies npm install # Build npm run build # Test with MCP inspector npm run inspector

Local Development Config

{ "mcpServers": { "vapi-local": { "command": "node", "args": ["<path>/dist/index.js"], "env": { "VAPI_TOKEN": "<your_vapi_token>" } } } }

Testing

# Unit tests (mocked) npm run test:unit # E2E tests (requires VAPI_TOKEN) export VAPI_TOKEN=your_token_here npm run test:e2e # All tests npm test

References

Install Server

A

security – no known vulnerabilities

A

license - permissive license

A

quality - confirmed to work

How are these scores calculated?

Vapi MCP Server

Vapi MCP Server

Claude Code Setup (Recommended)

1. Add MCP Server

2. Install Skill (Optional)

3. Restart Claude Code

Claude Desktop Setup

With OAuth (No API Key)

With API Key

Remote Configuration

Example Usage

Create a Voice Assistant

Make an Outbound Call

Schedule a Future Call

Using Variable Values in Assistant Prompts

Example Prompt with Variables

Default Variables

Remote MCP Server

Streamable HTTP (Recommended)

SSE (Deprecated)

Available Tools

Assistants

Calls

Phone Numbers

Tools (Function Calling)

Authentication

Development

Local Development Config

Testing

References

Resources

Tools

Appeared in Searches

Latest Blog Posts

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