What Is MCP (Model Context Protocol)? A Plain-English Guide for Website Owners

AI assistants are most useful when they can reach your real tools — your CMS, analytics, code repository or database. The Model Context Protocol (MCP) is an open standard that makes those connections consistent.

MCP in one sentence

MCP is like a universal adapter: a tool exposes an MCP server once, and any MCP-compatible AI app can use it.

How it works

• Host — the AI application you use (a desktop assistant, IDE or agent).
• Client — the connector inside the host that talks to a server.
• Server — a small program that exposes capabilities:
  • Tools: actions the AI can take (create a draft post, run a query)
  • Resources: data the AI can read (files, records, docs)
  • Prompts: reusable templates

When you ask for something, the model decides whether a tool would help, the host calls the server, and the result comes back into the conversation.

Practical uses

Websites & WordPress

Servers can wrap a CMS API so an assistant can list posts, draft content or update metadata — ideally creating drafts for human review.

AI coding

Coding assistants use MCP to reach GitHub, issue trackers, documentation, databases and browsers for testing.

Automation

Automation platforms offer MCP endpoints so an assistant can trigger workflows you've already built and tested. See AI automation for websites.

MCP with Claude and ChatGPT

Claude's apps and Claude Code support adding MCP servers. OpenAI supports MCP in its developer platform and in ChatGPT connectors. Check each vendor's current docs — support differs by plan and changes often.

Security checklist

1. Install servers only from sources you trust; read what tools they expose.
2. Use scoped API keys and least-privilege accounts.
3. Prefer read-only access to start.
4. Require confirmation for destructive, financial or public actions.
5. Be aware of prompt injection: content the AI reads (web pages, emails) can contain malicious instructions.
6. Log actions and review them.

Learn more in our MCP hub and AI agents explained.