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What is Vapi?

Vapi is a comprehensive platform for deploying heavily-customizable voice AI agents (called assistants) that support live, two-way conversations. Vapi provides a complete solution for creating voice assistants with control over speech-to-text (STT), language models (LLM), and text-to-speech (TTS) components. As a fully-managed system, Vapi even stores your call logs so you can track how well your agents are performing. Vapi has a built-in LMNT integration, allowing you to use your custom LMNT voices on their platform. Just provide Vapi with your LMNT API key, and your voices will be selectable when creating assistants.

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Key Features for TTS Integration

  • Real-time Conversations: Support for live, two-way conversations with low latency and natural interaction. Vapi handles interruptions (letting users cut in), endpointing (quickly detecting when the user is done speaking), emotion detection (passing user emotion to the LLM), and other features to make conversations more natural.
  • Phone Integration: Built-in support for both inbound and outbound phone calls. Vapi will even allot you a free phone number to use.
  • Web-based Testing: Test your voice agents directly from the Vapi dashboard, and create test suites to ensure your agents work as expected.
  • Customizable Assistant Behavior: Fine-tune your assistant’s personality, responses, and conversation flow.
  • Monitoring: Detailed logs with audio recordings and transcripts, as well as AI-based call success evaluations.

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Common Use Cases

  • Customer Support: Create AI-powered customer service agents that can handle inquiries and provide support
  • Sales Outbound - Qualifies leads using customizable scripts and schedules appointments with sales representatives based on prospect responses.
  • Service Updates/Notifications - Delivers critical alerts about service changes or account status with options to connect to live agents if needed.
  • Appointment Reminders - Makes personalized reminder calls with appointment details and processes simple rescheduling requests via voice commands.
  • Business Voice Assistants - Conducts routine client check-ins with branded voice identity and gathers preliminary information before human handoff.

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Getting Started

To get started with Vapi and LMNT:
  1. Create a Vapi account at dashboard.vapi.ai
  2. Add your LMNT API key in the provider keys tab. Your LMNT API key can be found in the playground.
  3. Create a new assistant using the dashboard
  4. In the Voice Configuration section of the agent setting page, select lmnt as the provider and choose a voice.
  5. Click publish to save changes.
  6. Test your assistant through the dashboard or by phone.

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Next Steps

Web calling quickstart

Now that you have gotten a basic agent deployed through the platform, see how you can create a Vapi assistant using LMNT on any web app.