What is the MCP tool type?

The MCP (Model Context Protocol) tool allows your Vapi assistant to connect directly to MCP servers for extended context and capabilities during a call.

How does the assistant communicate with my server?

When a tool is triggered, Vapi sends a POST request to your specified server URL with the tool arguments, and your server returns the result in a JSON response.

Do I need a Vapi API key?

Yes, this skill requires a valid VAPI_API_KEY set in your environment to authenticate with the Vapi API.

Can tools run in the background?

Yes, you can define tools as 'async', allowing the assistant to continue the conversation while a long-running operation completes in the background.

What types of tools can I create with this skill?

You can create function tools, call transfer tools, end-call tools, DTMF tools, and integrations for Google Calendar, Sheets, and Slack.

Vapi Tool Creation

Name: Vapi Tool Creation
Author: VapiAI

byVapiAI

•

API Development

Empowers voice assistants with custom capabilities like API integrations, call transfers, and automated workflows.

Vapi Tool Creation is a specialized skill for developing and managing capabilities that allow voice assistants to take real-time actions during phone calls. It provides a robust framework for implementing diverse tool types, including standard function calling for API lookups, telephony-specific actions like call transfers and DTMF signaling, and pre-built integrations with Google Workspace and Slack. By leveraging this skill within Claude Code, developers can quickly architect complex voice workflows, handle server-side tool implementations, and connect assistants to the Model Context Protocol (MCP) for advanced data retrieval and task automation.

Key Features

01Create custom function tools with webhook server support

0222 GitHub stars

03Integrate directly with Google Calendar, Sheets, and Slack

04Connect assistants to Model Context Protocol (MCP) servers

05Support for asynchronous background execution and custom status messages

06Implement telephony actions like call transfers and DTMF navigation

Use Cases

01Creating an order tracking assistant that queries internal databases via REST APIs

02Developing a customer support agent that can transfer callers to specific departments

03Building a voice-based appointment booking system with Google Calendar integration

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add vapiai/skills create-tool

For use in Claude.ai and ChatGPT

Download Skill