MCP server
An MCP server is a small program that exposes a tool or a set of data to an AI agent using MCP.
What it tells you about a developer
Building an MCP server is integration and API design work rather than model work. A developer who has shipped one has thought about access boundaries, which matters for any role touching agents and company data.
An MCP server is called a server because it serves something up, in this case a specific tool or a specific set of data, to anything that connects to it using MCP. A company might run an MCP server that gives an agent access to its calendar, its file storage, or a search tool. A developer who builds an MCP server decides exactly what that server allows an agent to do and see, which is also the main safeguard against an agent doing something it should not.