Trillet voice AI API and platform overview

Trillet is a voice AI API and platform for building AI phone agents that answer and place calls, chat on your website and hand off to people when needed. You can build agents in the dashboard, with the REST API, or from an AI assistant over MCP, then connect phone numbers, run batch outbound calls and automate follow-up with workflows. Calls start from $0.12 per minute and phone numbers from $4.99 per month.

For AI agents and LLMs. A full index of these docs is at /llms.txt and the complete text is at /llms-full.txt. Add .md to any page URL to get its Markdown source. The Trillet OEM OpenAPI spec is at trillet-oem.json.

Start building

Quick Start

Set up your first agent in minutes!

API Reference

Explore our comprehensive API documentation

Other ways to build

AI assistants (MCP)

Build and test agents from Claude, ChatGPT, Cursor and other MCP clients

Trillet OEM (early access)

Run Trillet voice agents inside your own product for each of your customers

Core Features

Call Agents API

Create and manage conversational call agents with unique voices and personalities through our REST API

Knowledge Bases API

Create knowledge bases and add text or files

Call Flows API

Design and control call & conversation flows programmatically

Message Flows API

Create SMS and chat flows and switch autopilot on or off

Voice Calls API

Initiate and manage voice calls via REST endpoints

Conversations API

Design and control customer interactions through conversations programmatically

Getting Started

Sign up for an API key at app.trillet.ai
Follow our Quick Start Guide to make your first API call
Explore our API Reference for detailed endpoint documentation

Resources

API Documentation

Complete API reference

Best Practices

API integration guidelines

Support

Get technical help