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Anthropic's Model Context Protocol Aims to Standardize How AI Connects to Tools

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Anthropic released the Model Context Protocol (MCP) in late 2024 as a universal standard for connecting AI applications to external tools and data systems. Before MCP, developers faced a costly N×M integration problem, requiring custom code for every combination of AI model and external service. MCP reduces this to an N+M model, where each tool is built once behind the protocol and any compatible AI client can use it without additional custom work. The protocol defines three roles — servers wrapping external systems, clients representing AI applications, and hosts as the user-facing product — and supports three capability types: tools, resources, and prompts. Proponents compare its potential impact to how USB-C standardized device connectivity or how SQL standardized database access.

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