MCP server for the Assistable v3 API — multi-channel voice AI for customer interaction automation. Place and manage AI phone calls, send SMS/WhatsApp/web-chat messages, and manage assistants, contacts, conversations, and appointments. One agent with persistent memory across voice, SMS, WhatsApp, and web chat. Bearer API key auth (ask_live_…). Run: npx -y @assistableai/mcp. By Assistable Machine Learning, Inc. (assistable.ai).