Dial is a communication stack purpose-built for AI agents, providing voice calls, SMS, and iMessage through a single REST API or MCP server. It provisions real US, Canadian, and international phone numbers in seconds, giving each agent its own persistent phone identity. Inbound and outbound calls include real-time transcription and text-to-speech replies, while a unified webhook delivers all channel events in a consistent format. Dial integrates directly with Claude Code, Cursor, LangChain, and other AI coding tools, and every account starts with $5 of free credit.