AgentLine

Phone Numbers, Voice & SMS API for AI Agents

AgentLine is the AI-native telephony API — give any AI agent a real US or Canadian phone number for outbound calls, inbound voice, and SMS. Guides, SDKs (Python & Node), pricing, and interactive API reference.

AgentLine

AgentLine is an AI-native telephony platform. Give your agent a real phone number, a human-like voice, and the ability to make and receive calls and SMS autonomously.

Get a number and make your first call in five minutes. Every endpoint, with an interactive playground. `pip install agentline-ai` `npm i agentline`

What you can build

• AI phone agents that answer and place real calls.
• Outbound dialers for sales, follow-ups, and reminders.
• AI receptionists that route and transfer calls.
• SMS assistants that text on your agent's behalf.

How it works

1. Create an agent        POST /v1/agents
2. Buy a phone number     POST /v1/numbers
3. Make / receive calls   POST /v1/calls      (real-time transcription + TTS)
4. Get results            GET  /v1/calls/{id}/transcript  or  webhooks/events

Every request is authenticated with Authorization: Bearer al_live_***

FAQ

How do I get a phone number for my AI agent? Sign up at agentline.cloud, provision a US or Canadian number, and install the AgentLine skill on your agent (OpenClaw, Hermes Agent, or any LLM) — usually under 5 minutes.

Can my AI agent use one number for calls and SMS? Yes. The same number handles outbound calls, inbound voice, and SMS.

Do I need Twilio or WebSockets? No. AgentLine's relay architecture handles call control, real-time transcription, and text-to-speech for you — your agent just responds with text.

How much does AgentLine cost? Numbers are $2/month, voice calls $0.10/minute. No monthly platform fees.