Vapi Voice Calls

Make real outbound phone calls through Vapi's voice AI platform.

Prerequisites

Check that these are set in your environment:

• VAPI_API_KEY
• VAPI_ASSISTANT_ID
• VAPI_PHONE_NUMBER_ID

If any are missing, read references/setup.md and complete first-time setup before proceeding.

Making a Call

Use the Vapi POST /call endpoint with: