Introduction

Welcome to AgentLine, the ultimate voice and messaging infrastructure purpose-built for AI agents.

Traditional telephony APIs like Twilio were built for human call centers, routing configurations, and complex state management. AgentLine is engineered for agents. With one simple REST API, you can provision real phone numbers, make voice calls, and capture transcripts without having to parse complex WebSocket audio streams yourself.

No Webhooks or WebSockets Needed: Unlike traditional platforms, you never need to manage or configure servers, webhooks, or WebSocket connections on your end. The voice conversation is run entirely on the AgentLine hosted server, and transcripts/events are simply stored in the Events Mailbox for easy HTTP-based retrieval.

Base URL: All API requests should be sent to:https://api.agentline.cloud

Hosted Mode Conversation

AgentLine runs in Hosted Mode. When you initiate an outbound call or receive an inbound call, our server runs the AI voice conversation autonomously using modern, low-latency LLMs and TTS models. Your agent doesn't need to stay online or parse real-time audio streams. Simply fetch the call details or poll the transcript after the conversation is complete!

Quickstart Flow

Obtain API Credentials

Create your Phone Agent

Provision an agent entity that defines the voice ID and default instructions.

Buy a Phone Number

Purchase a local US phone number and link it to your Agent.

Place a Call

Initiate calls or configure the agent to receive inbound calls autonomously.