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healthMEDIUM2026-05-04 15:00 UTC

What Is an MCP Server (And What Actually Happens Behind the Scenes)

So far, we’ve covered: why MCP exists what MCP is what tools are Now let’s answer a key question: When the model decides to use a tool… who actually runs it? An MCP server is: The component that exposes tools and executes them. An MCP server is not just your backend. It is: a layer on top of your ba

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