Vapi connector

The vapi MCP adapter connects to the Vapi API. Discover voice assistants configured in your Vapi account and retrieve full assistant configurations — useful for auditing prompts, syncing assistant metadata into internal docs, and orchestrating voice workflows alongside other connectors.

Prerequisites

A Vapi account with at least one configured assistant
A Vapi private API key (Bearer token)
project_contributor access in AgentRuntime

Connect in AgentRuntime

Get a Vapi API key

Create a connection

Go to Connections and click New custom connection to create an API key connection with APIKey.

Add vapi MCP instance

Go to MCP, click Add instance for vapi, wire your connection on Instance config, set the profile active, and save.

List assistants

Run mcp_call → list_assistants to confirm the key and see assistant IDs.

See Authentication for binding connections to MCP instances.

This adapter currently exposes read-only assistant discovery tools. Outbound call creation and live call control are configured in Vapi directly or via future adapter tools.

What you can build

Assistant inventory — Scheduled list_assistants → diff against expected list → alert on drift.
Config documentation — get_assistant → LLM summarizes model, voice, and tool settings → save to Notion.
Pre-call validation — Before a campaign, verify assistant ID and prompt version match release notes.
Cross-system sync — Export raw_json to internal config store for compliance review.

Tools

Tool	Description
`list_assistants`	List voice assistants visible to the API key
`get_assistant`	Full assistant configuration by ID (includes pretty-printed JSON)

Example

Fetch assistant configuration for audit logging:

{
  "id": "vapi-audit",
  "type": "mcp_call",
  "name": "Get Vapi assistant config",
  "tool_name": "get_assistant",
  "tool_args": {
    "assistant_id": "{{input.assistant_id}}"
  },
  "timeout_s": 30
}

Configuration

Key	Required	Description
`APIKey`	Yes	Vapi private API key (Bearer token)
`APIBase`	No	Vapi API base URL

Troubleshooting

Issue	Fix
`401 Unauthorized`	Verify private key, not a publishable or webhook-only key
Assistant not in list	Key may be scoped to a different Vapi org or project
Empty `raw_json`	Check HTTP status in tool output; assistant ID may be invalid
Timeout on get	Large assistant configs with many tools may need higher `timeout_s`

Integrations quickstart
ElevenLabs connector — text-to-speech synthesis
Connector catalog
Troubleshooting

Get started

Platform

Workflows

Guides

Integration setup

Connectors

AI & chat

API

Prerequisites

Connect in AgentRuntime

What you can build

Tools

Example

Configuration

Troubleshooting

​Prerequisites

​Connect in AgentRuntime

​What you can build

​Tools

​Example

​Configuration

​Troubleshooting

​Related

Prerequisites

Connect in AgentRuntime

What you can build

Tools

Example

Configuration

Troubleshooting

Related