Learn MCP and Agent Skills
Guides written by the team that indexes MCP servers and agent skills every day. Facts checked against the specification, numbers from our own catalog.
What is MCP (Model Context Protocol)?
MCP is an open standard that connects AI apps to tools and data. How it works, what MCP stands for, the 2026-07-28 spec, and how to start using MCP servers.
Read the guide →MCP (Model Context Protocol) is an open standard that lets AI apps like Claude, ChatGPT, Cursor and VS Code use outside tools and data through one common interface. A tool publishes an MCP server once, and any app with an MCP client can call it. Messages are JSON-RPC 2.0.
All guides
- 0213 min readNov 12, 2026
What is an MCP server?
An MCP server gives AI apps tools and data from one system, like GitHub or Postgres. How servers work, local vs remote, examples, and how to pick a good one.
6 questions answered
- 0311 min readNov 12, 2026
MCP vs API: what's the difference?
MCP doesn't replace APIs. It wraps them so AI apps can find and call them. Differences, a side-by-side table, and when to use an API, function calling or MCP.
5 questions answered
- 0410 min readNov 12, 2026
How to build an MCP server
Build a working MCP server in TypeScript or Python with the current SDKs, test it in the MCP Inspector, connect it to Claude Code, and publish it.
6 questions answered
- 0510 min readNov 12, 2026
MCP security best practices: the risks and how to stay safe
The real security risks of MCP servers: prompt injection, compromised local servers, token passthrough and more, with a practical checklist for users and builders.
5 questions answered
- 0611 min readNov 12, 2026
What are Claude skills (Agent Skills)?
Claude skills are folders with a SKILL.md that teach an agent a task. How they load, where they work beyond Claude, skills vs MCP, and examples worth installing.
6 questions answered
- 0710 min readNov 12, 2026
How to build a skill in Claude
Write a Claude skill from scratch: folder layout, SKILL.md fields, descriptions that load, scripts, testing in Claude Code, and sharing it with your team.
6 questions answered
- 088 min readNov 12, 2026
How to install Claude skills
Install Claude skills from GitHub into Claude Code, Codex, Gemini CLI or claude.ai: where the skills folder is, one-line commands, plugin marketplaces and fixes.
6 questions answered