# MemOS — Long-Term Memory for AI Agents > MemOS is a memory operating system that gives AI agents persistent, evolving long-term memory. It enables agents to remember user preferences, learn from interactions, and build reusable skills over time. ## Documentation - [Full Documentation (llms.txt)](https://memos-docs.openmem.net/llms.txt): Complete technical docs index - [Full Documentation (text)](https://memos-docs.openmem.net/llms-full.txt): All documentation in a single file ## Quick Links - [Quick Start](https://memos-docs.openmem.net/memos_cloud/getting_started/quick_start): Get started with MemOS Cloud in minutes - [API Reference](https://memos-docs.openmem.net/api_docs/core/add_message): Core API documentation - [MCP Server Guide](https://memos-docs.openmem.net/mcp_agent/mcp/guide): Connect via Model Context Protocol - [Open Source](https://github.com/MemTensor/MemOS): MemOS open-source engine on GitHub ## Product Pages - [Home](https://openmem.net/): Product overview and features - [OpenMem Platform](https://openmem.net/openmem): Cloud platform details - [Pricing](https://openmem.net/pricing): Plans and pricing - [Dashboard](https://memos-dashboard.openmem.net/): Developer console - [Playground](https://memos-playground.openmem.net/): Try MemOS interactively