AgentLine

A telephony API that provides phone numbers for AI agents, enabling voice calls, SMS, and inbound conversations through a single interface. It targets developers and engineering teams building AI agents, from startups to large companies. It differentiates by offering a unified, hybrid relay pipeline with native AI integration, simplifying setup compared to traditional telephony APIs.

Key features

• Get a phone number in under 5 minutes
• Make calls and send SMS
• Handle inbound conversations
• One API for calls, SMS, voice
• Python and Node.js SDKs
• Prompt-based skill file
• MCP support
• US and Canada numbers