Vapi Integration

Vapi is a platform for building, testing, and deploying AI voice agents. It provides APIs for creating conversational voice experiences with support for custom LLM providers for the AI backend.

Vapi supports custom LLM providers through its dashboard configuration.

Prerequisites

An LLM API account with an API key
Vapi installed or accessible

Setup

Get Your LLM API Key

Log in to your LLM API dashboard
Click Create Key to Start
Copy your new API key immediately — it will only be shown once
Store the key securely (e.g., in a password manager or .env file)

LLM API is an OpenAI-compatible gateway that gives you access to dozens of AI models through a single API key and endpoint.

Configure LLM API in Vapi

Log in to your Vapi dashboard at vapi.ai.
Navigate to Provider Keys or Model Settings.
Click "Add Key" and select "Custom / OpenAI Compatible".
Enter:
- API Key: paste the key you copied from app.llmapi.ai/api-keys
- Base URL: https://api.llmapi.ai/v1
Click "Save".
Select the LLM API model when configuring your voice agent.

Test the Integration

Verify that Vapi can successfully communicate with LLM API by sending a test request. All requests will now be routed through LLM API.

Vapi's voice agents benefit from fast models. Use LLM API to access optimized inference endpoints.

Benefits of Using LLM API with Vapi

Multi-Provider Access: Use models from OpenAI, Anthropic, Google, and more through a single API
Cost Control: Track and limit your AI spending with detailed usage analytics
Unified Billing: One account for all providers instead of managing multiple API keys
Caching: Reduce costs with response caching for repeated requests

View all available models on the models page.