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May 14, 2026 · 9 min read

MCP Protocol Explained: What It Is and Why Every Site Should Know About It

Model Context Protocol (MCP) is how AI agents securely interact with external tools. We break down what it means for website owners.

RS

RS Digital Team

Published May 14, 2026

What is the Model Context Protocol?

Created by Anthropic and rapidly adopted across the AI industry, the Model Context Protocol (MCP) is an open standard that allows AI models to connect securely to external data sources and tools. Think of it as a "USB-C cord for AI apps."

Before MCP, every AI assistant (like ChatGPT or Claude) had to build custom, proprietary integrations for every single software tool on the internet. With MCP, developers can build a single MCP server, and any compliant AI agent can instantly understand how to use it.

Why Website Owners Need to Care

If you run a SaaS company, an e-commerce store, or a data-rich website, MCP is your bridge from "being read by AI" to "being used by AI".

  • Read-only discovery: Tools like llms.txt simply let AI read your public content.
  • Actionable discovery: Hosting an MCP server allows an AI agent to query your database on a user's behalf, book a service, or retrieve customer-specific data.

Example: A user asks Claude, "What is the status of my recent order from [Your Store]?" If you provide an MCP server, Claude can securely fetch down the exact order status and present it natively in the chat interface.

How MCP Discovery Works

AI agents need to know you have an MCP server. The emerging standard for this is web discovery via a Server Card. By placing a file at /.well-known/mcp.json, you announce your capabilities to the autonomous web.

A basic MCP Server Card looks like this:

{
  "mcp": {
    "version": "1.0",
    "servers": [
      {
        "name": "AcmeCorp API",
        "endpoint": "wss://api.acmecorp.com/mcp",
        "description": "Look up AcmeCorp product inventory and pricing."
      }
    ]
  }
}

Is Your Site Agent-Ready?

Embracing MCP is the ultimate demonstration of AI-readiness. Even if you don't host a full server yet, structuring your site to support agent discovery puts you ahead of 99% of your competitors.

Use our newly launched Agent Scanner to test your domain. We specifically probe for /.well-known/mcp.json and HTTP header signals indicative of web-accessible MCP capabilities.

Done!