How Functions Work

Custom functions allow the AI voice assistant to make API calls during conversations. When the AI determines it needs to execute a function, it will:

1. Extract parameters from the conversation based on the JSON schema
2. Make an HTTP request to the configured endpoint
3. Process the response and continue the conversation

Function Types

• calendar_check - Check calendar availability (uses Google Calendar API)
• calendar_book - Book appointments on calendar (uses Google Calendar API)
• custom - Custom API endpoint that you define

Payload Types

• args_only - Send only the extracted arguments as JSON
• full_context - Include call context (callSid, callerNumber, etc.)
• custom - Use a custom payload template

Parameters JSON Schema Example

{
  "type": "object",
  "properties": {
    "date": {
      "type": "string",
      "description": "The date for the appointment (YYYY-MM-DD)"
    },
    "time": {
      "type": "string",
      "description": "Preferred time (HH:MM)"
    }
  },
  "required": ["date"]
}