Model Context Protocol (MCP) — definition
Model Context Protocol (MCP) is an open-standard communication protocol introduced by Anthropic that connects AI models seamlessly to local and remote data sources, tools, and enterprise databases.
Expanded Explanation
MCP replaces fragmented custom API integrations with a unified client-server standard, enabling AI assistants and agents to securely read files, run database queries, and trigger actions.
Analogy & Mental Model
MCP is like USB-C for AI models: a single universal connector that lets any AI application plug into any tool or database without building custom adapters.
Why It Matters & Where It's Used
MCP enables AI search agents and enterprise assistants to query internal knowledge bases and external APIs with standardized security and context controls.
Concrete Real-World Application
Claude Desktop using an MCP server to search a company's internal Postgres database and Google Drive simultaneously.
Model Context Protocol (MCP) vs REST API
A REST API defines arbitrary web endpoints, whereas MCP defines a standardized context and tool discovery protocol tailored specifically for LLMs.
How It Works & Key Components
Operates via JSON-RPC 2.0 messages between MCP Clients (host AI apps) and MCP Servers (data providers).
1Resources Exposure
Allowing MCP servers to expose files, database schemas, and API data to the AI model.
2Tools Discovery
Exposing executable functions that the AI model can invoke autonomously.
3Prompts Templates
Providing pre-built prompt workflows for complex multi-step tasks.
Frequently Asked Questions
Q:Who created the Model Context Protocol?
Anthropic open-sourced MCP in late 2024, and it has since been adopted across major developer tools and agent frameworks.
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