Model Context Protocol (MCP) is an open standard designed to connect AI applications with the tools and data they require. It establishes a framework where a server advertises its capabilities, and the application presents these options to the underlying model. When the model requires external functionality, the application invokes the server, receives the result, and feeds it back into the context.
This architecture moves beyond simple JSON-RPC or REST interfaces, defining specific methods for capability negotiation, transport protocols, and tool usage. By decoupling the model from direct server communication, MCP facilitates more flexible and scalable integrations across various AI platforms. The protocol supports complex workflows by standardizing how AI agents discover, negotiate, and execute actions with external resources, effectively acting as a bridge between intelligent models and the digital infrastructure they depend on to function effectively.
Source: Hacker News · Summarized by HeadlinesBriefing