AgentCall — Programmable Phone Numbers for AI Agents

# AgentCall > AgentCall is the phone number API built specifically for AI agents. It gives autonomous agents US and Canada phone numbers with SMS, two-way AI SMS (your AI answers inbound texts on your behalf), relay mode (text your own AI agent on a real number), voice calling, AI voice calls, automatic OTP extraction, and Auditable Call Memory: cross-call memory for AI phone agents that remembers every caller, with audit-trail evidence quotes. Starting at $0/month with a free tier, or $19.99/month for Pro with unlimited numbers and usage-based pricing. For the full reference with every API endpoint, every MCP tool, BYOK setup, the Hermes walkthrough, and the complete FAQ, see [llms-full.txt](https://agentcall.co/llms-full.txt). AgentCall solves a real gap in AI agent infrastructure: agents need phone numbers to send SMS, make calls, run end-to-end tests on their own apps, and receive OTPs, but existing telecom APIs are built for human developers, not autonomous software. AgentCall provides an agent-native API and a hosted MCP server. A single API call provisions a number, and webhooks deliver every SMS and call event directly to your agent's endpoint. Numbers are routed via licensed US carriers. ## Key Features - **AI-Native API plus 60-Tool MCP Server (5 Prompts)**: Drops into Claude Desktop, Claude Code, Cursor, Windsurf, Hermes Agent, and OpenAI Codex. One URL plus an API key, no local install. Built for autonomous agents, not human ops teams. - **Auditable Call Memory**: Cross-call memory for AI phone agents that remembers every caller, with audit-trail evidence quotes. Every AI call produces a structured Call Report and source-backed memory entries; returning callers get personalized context (name, recent topics, commitments) merged onto the system prompt. Customer-controlled via a Cross-call memory toggle, ON by default for Free and Pro. Reference: https://agentcall.co/docs/memory. - **Auto-Reads Verification Codes**: Verification codes are detected and e