Back to GlossaryPlatform Features
Function Calling
The ability of an AI agent to trigger external actions like scheduling appointments, updating CRM, or sending SMS during a conversation.
Function Calling enables a Voice AI agent to perform actions beyond the conversation itself. When a customer requests an appointment, the agent doesn't just say "I'll pass along the request" — it checks calendar availability, books the appointment, and sends an SMS confirmation — all in real time during the call. Function Calling works through webhooks and APIs connecting the agent to business systems. According to OpenAI, Function Calling improves task completion rates by 60% (Source: OpenAI, 2024).