Sends a client-generated event or object to the VAPI platform. Commonly used for live updates or user actions.

Creates an outbound phone call to Twilio or Vonage number added on your dashboard.

Creates a new voice assistant with a specified configuration (name, voice, model, etc.).

Starts a new call session using an assistant or a squad. Often used to simulate or initiate interactions.

Creates a group of assistants (a squad) where the first available assistant responds to a call.

Defines a new tool that can be invoked by an assistant (e.g., API calls, function tools, DTMF).

Sets up a conversation workflow made of nodes (conversation and tool nodes) and conditional edges.

Deletes a specific assistant by ID.

Deletes call metadata and logs for a particular conversation.

Permanently deletes a workflow by its ID.

Retrieves information about a specific squad, including its members.

Fetches the details of a tool, such as its configuration and endpoint.

Returns the complete definition of a workflow, including all nodes and transitions.

Performs an arbitrary authorized API call.

Sends a message from the VAPI server to the client app. Often used to trigger UI changes or sync data.

Updates the configuration of an existing assistant.

Allows updates to a specific call session (e.g., tagging, note-taking).

Updates members or configuration of a squad.

Modifies an existing tool's logic or structure.

Applies updates to an existing workflow (e.g., new nodes, changed prompts).