Skills vs MCP: the difference, in plain English

A skill is a set of instructions. It tells the AI how to approach a task: the steps, the style, the checks. It lives in a folder with a SKILL.md file, and it does not connect to anything by itself.

MCP stands for Model Context Protocol. It is a standard way to plug an AI app into outside services such as your calendar, a database, a task tracker or a file store. An MCP connector gives the AI the ability to read from, or act on, that service.

Think of a new assistant. A skill is the written procedure for how your company writes a customer reply: tone, structure, what to avoid. An MCP connector is the key to the help desk system, so the assistant can open tickets and read history.

One without the other is limited. A procedure with no access can only work on what you paste in. Access with no procedure can open every ticket and still write a poor reply.

Use these rules of thumb.

• Choose a skill when you want the same method every time: a writing style, a review checklist, a report format.
• Choose a connector when the AI needs fresh data or must take an action in another app.
• Choose both when the method depends on live data, for instance a skill that defines how to write a weekly update plus a connector that reads this week's tasks.
• Neither is needed for a one-off question. Just ask.

A skill can only do what the app can already do, plus run any scripts it includes, so the risk is mostly in what its instructions and scripts say. A connector can reach real accounts and data, so the risk is in what permissions you grant. Read both before you install.

On this site we cover skills. Connectors are covered by our sister site, Best Claude Apps, which lists MCP connectors for Claude and explains them in the same plain style.

Say you run a small shop and want a weekly summary of customer feedback. Here is how the two halves split the work.

The method is identical either way, which is the point: the skill does not change when the data source does. Start with the skill. It costs nothing to try, and it works with pasted text. Add a connector later if the copying gets tedious.

To get a feel for skills, browse by job: writing, marketing or research. Each skill page explains what you get and how to install it in Claude or ChatGPT. If you are choosing a place to find them, read our marketplace guide.