Vapi - Netra Docs

Vapi

Vapi is a hosted voice AI platform that manages STT, LLM, and TTS pipelines. Netra integrates with Vapi to evaluate voice assistants through automated simulations—placing simulated calls, recording conversations, and scoring quality.

How It Works

Netra connects to your Vapi assistant to run voice simulations:

You configure your Vapi credentials in the Netra dashboard
Netra creates a call via Vapi’s REST API
A simulated caller speaks with your assistant over websocket
After the call, Vapi sends a webhook with transcript and recording
Netra processes the data and evaluates the conversation

Configuration

Register your Vapi assistant under Evaluation → Agents in the Netra dashboard. Select Voice as the modality and Vapi as the platform.

Field	Description
API Key	Your Vapi API key (private key)
Assistant ID	The Vapi assistant to evaluate
Phone Number	Optional phone number for phone-based assistants

You can find your API key and assistant ID in the Vapi dashboard.

Key Differences from LiveKit

Aspect	LiveKit	Vapi
Integration type	Room-based with optional SDK	Hosted platform, dashboard-only
SDK instrumentation	Optional (OTLP spans from agent)	Not possible (hosted platform)
Telemetry	Real-time via OTLP or room events	Webhook-based (after call completes)
Audio protocol	LiveKit room protocol	Websocket binary frames
Recording	Room recording	Stereo recording (user/agent channels)

Webhook Setup

For Vapi to send call data to Netra, configure the end-of-call-report webhook in your Vapi dashboard. Netra receives the webhook, processes the transcript and recording, and converts the data into standard span format for the UI and evaluators.

Voice Simulation Agents — Register your Vapi assistant in Netra
Voice Simulation Datasets — Create test scenarios for your voice assistant
LiveKit Integration — Compare with LiveKit integration

Last modified on August 28, 2026