Build an MCP Server from Scratch in 2026 | Local, Remote, OAuth & Claude Skills

AI tooling is moving fast. One month it's MCPs, the next it's skills, and suddenly developers are expected to support CLIs, coding agents, and ChatGPT. In this tutorial, you'll learn how local MCPs, remote MCPs, skills, and CLIs fit together around a single shared core that works everywhere. 💻 Source Code: https://cwa.run/sendkit ⭐ Clerk: https://cwa.run/clerk ⭐ Railway: https://cwa.run/railway Timestamps: 00:00:00 Intro 00:03:18 What we are building 00:14:21 The CLI 00:39:34 Shared Core 01:09:18 Local MCP 01:36:38 Remote MCP 01:57:54 OAuth 02:21:55 CLI Config 02:37:35 Formatting & Linting 02:48:27 Bundling 03:03:03 Publishing 03:35:02 Deploying OAuth 03:37:46 Skill 03:52:00 Outro