Model Context Protocol (MCP) for Developers — Build a Simple Tool Server (2026)

Canonical URL: Republished from munonye.com. Full code on GitHub.

Model Context Protocol (MCP) is a 2026 must-know for developers building AI tooling. This hands-on guide is in our AI Developer Tutorials hub.

MCP roles

Role	Example
Host	Cursor IDE, Claude Desktop
Client	MCP client inside the host
Server	Your Java/Node service exposing tools

Minimal tool server (concept)

// Pseudocode — MCP SDK pattern
server.tool("get_weather", { city: "string" }, async ({ city }) => ({
  content: [{ type: "text", text: `Weather in ${city}: 22°C` }],
}));

Bridge to Spring AI

Your existing @Tool methods in M8-B solve the same problem inside the JVM. MCP generalizes this for IDE agents and polyglot stacks.

Next: Event-driven AI agents with Axon (M9-B)

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Full tutorial: Model Context Protocol (MCP) for Developers — Build a Simple Tool Server (2026)

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