If you've been building with AI agents in 2026, you've already heard about MCP — Model Context Protocol. Introduced by Anthropic in late 2024, it quietly became the USB standard for AI: one protocol that lets any LLM — Claude, GPT-4o, Gemini — connect to databases, APIs, file systems, and cloud tools without custom integration code for every combination.

As AI systems evolve from conversational assistants into tool-driven and action-oriented platforms, a standardized way to connect Large Language Models (LLMs) with backend capabilities becomes essential. Directly coupling prompts with APIs leads to tight dependencies, security risks, and poor scalability.