This tutorial walks you through setting up your first AI voice agent on Vapi — the most flexible API-first platform for developers. Total time: 1-2 hours depending on your experience.

Step 1: Sign up for Vapi and add credit

This step covers sign up for vapi and add credit. Follow the platform-specific instructions for Vapi.

Step 2: Create Twilio account and get phone number

This step covers create twilio account and get phone number. Follow the platform-specific instructions for Vapi.

Step 3: Write your system prompt

This step covers write your system prompt. Follow the platform-specific instructions for Vapi.

Step 4: Configure LLM and TTS

This step covers configure llm and tts. Follow the platform-specific instructions for Vapi.

Step 5: Set up webhooks

This step covers set up webhooks. Follow the platform-specific instructions for Vapi.

Step 6: Test with real call

This step covers test with real call. Follow the platform-specific instructions for Vapi.

Step 7: Deploy to production

This step covers deploy to production. Follow the platform-specific instructions for Vapi.

Step 8: Monitor and iterate

This step covers monitor and iterate. Follow the platform-specific instructions for Vapi.

Ready to deploy?

See our complete 2026 guide for everything you need to know before going live.

Read the complete guide