MCP Builder Kit — a Real Production MCP Server + Starter Template + Monetization Guide

Every MCP tutorial shows you a hello-world. This kit hands you a production server. The MCP Builder Kit teaches the Model Context Protocol the way engineers actually learn — by reading working code. Inside is the complete source of a real MCP server WOWHOW ships (a WordPress SEO Toolkit with ten tools), a minimal starter template built on the exact same SDK surface, and a guide covering the one topic no tutorial touches: how to license-gate and sell what you build.

The reference server

A complete, production MCP server for Claude Code and Claude Desktop: ten tools spanning full-page SEO audits, broken-link checking, schema-markup validation, meta generation, site health, competitor comparison, keyword opportunity mining, redirect checking, and bulk audits. You get the full TypeScript source — the config system, the tool registration pattern, zod schemas with model-facing descriptions, HTTP fetching and HTML parsing, scored report shaping, and the tsup build that produces an npx-runnable binary. This is code that runs for real users, structured the way you'd want yours structured.

The license-gating pattern nobody documents

The reference server implements a free/premium split: free tools always register, premium tools register only when a license key validates against a remote endpoint — with the validator server-side so the shipped package contains no secret material, an offline grace cache, and fail-closed behavior back to the free tier. This is the monetization architecture for MCP: give the free tier to directories for distribution, sell keys for the premium tier. The guide walks the whole model.

The starter template

One working tool, ~40 lines, same SDK imports as the reference. npm install && npm run build, register it in Claude Code, and you have a live MCP server in ten minutes. Every new tool is a cloned block: schema, description, handler.

Who this is for

Developers who want to build MCP servers for their own stack — or to sell. MCP is the connective tissue of the Claude ecosystem and directories are hungry for niche servers; the developers shipping license-gated servers now are early. If you can write TypeScript, this kit removes every unknown between you and a shippable server.

Details

41 files: complete reference server source (MIT-licensed, by WOWHOW), starter template, build-and-ship guide, licensing playbook. Requires Node 18+ and TypeScript basics. Works with Claude Code CLI and Claude Desktop. Single-user license, unlimited projects — build and sell as many servers as you want with these patterns. Instant download, pay once, keep forever.

Pairs with the Claude Code Production Pack (the agent/skill operating system) and the AI Growth Team Pack (the marketing department).