How to Use the Vapi MCP in Claude Code

Q: How do I list all available tools with Vapi when running scripts in Claude Code?

Run listagenttools. This command exposes every function within the Vapi MCP Server, letting your script know exactly what operations it can execute against the API.

Q: What is the best way to list all configured assistants using Vapi with Claude Code?

Use listassistants. This tool fetches a manifest of every Voice AI assistant persona that has been deployed and configured in your Vapi environment.

Q: How do I manage data privacy for transcripts when using Vapi in Claude Code?

The server touches transcripts. Since this is running headless, ensure the script only reads necessary transcripts via getcalldetails to maintain strict control over sensitive communication data.

Q: Can I list all phone numbers before an automated call using Vapi in Claude Code?

Yes. The listphonenumbers tool gives you a complete inventory of every connected phone number ID, ensuring your script selects the correct target for any outbound calls.

Q: If I need to update an assistant config in Claude Code, which Vapi function do I use?

You'll use updateassistant. This tool lets you programmatically change settings on an existing persona without needing manual intervention. It’s ideal for CI/CD updates.

Script complex voice operations for CI/CD pipelines using Claude Code and the MCP Server.

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Create Assistants Via Scripting

You can programmatically set up personas using `create_assistant`. This tool requires a JSON string containing the transcriber, model, and voice configuration. It's perfect for deploying standard assistants across many environments.

Manage Call State Headlessly

Need to check call status in a pipeline? Use `get_call_details` to fetch transcripts and metrics for any given ID. Similarly, `list_calls` gives you the state of recent calls without needing an interactive session.

Programmatic Call Initiation

For automated testing or scheduled tasks, use `create_web_call` to get a web call configuration. Alternatively, `create_phone_call` handles the outbound initiation for scripted phone calls using the necessary IDs.

Setup guide

Set up Vapi MCP in Claude Code

Prerequisites

Claude Code CLI installed (npm install -g @anthropic-ai/claude-code)
Active Vinkius subscription with a valid endpoint token

1

Run the add command

Open your terminal and run the command shown on the right. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com. Use --scope user to make it available across all projects.
2

Verify the connection

Start a Claude Code session and type /mcp to list connected servers. You should see vapi-mcp with a green status indicator.
3

Start using tools

Ask Claude Code something like "Check my latest Vapi transactions." It will automatically discover and invoke the available Vapi tools.

Terminal

claude mcp add --transport http vapi-mcp https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

Get your connection token →

Prerequisites

Claude Code CLI installed
Active Vinkius subscription with a valid endpoint token

1

Open the config file

Create or edit .mcp.json in your project root for project-level scope, or ~/.claude.json for user-level scope.
2

Add the Vapi MCP

Paste the JSON snippet shown on the right into the mcpServers object. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Restart Claude Code

Start a new Claude Code session. Type /mcp to confirm the server is connected. The tools will be automatically available in your conversation.

.mcp.json

{
  "mcpServers": {
    "vapi-mcp": {
      "type": "url",
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Get your connection token →

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Common questions about Vapi MCP in Claude Code

Run `list_agent_tools`. This command exposes every function within the Vapi MCP Server, letting your script know exactly what operations it can execute against the API.

Use `list_assistants`. This tool fetches a manifest of every Voice AI assistant persona that has been deployed and configured in your Vapi environment.

The server touches `transcripts`. Since this is running headless, ensure the script only reads necessary transcripts via `get_call_details` to maintain strict control over sensitive communication data.

Yes. The `list_phone_numbers` tool gives you a complete inventory of every connected phone number ID, ensuring your script selects the correct target for any outbound calls.

You'll use `update_assistant`. This tool lets you programmatically change settings on an existing persona without needing manual intervention. It’s ideal for CI/CD updates.

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