MCP: complete definition in AI for SMEs

The MCP (Model Context Protocol) is an open standard that lets a language model interact with external data sources, tools and services through a unified interface. Created by Anthropic, it defines how an LLM discovers available tools, calls them and interprets results — like a universal connector for AI. MCP servers expose resources (databases, APIs, files) and MCP clients (Claude Desktop, Cursor, other environments) consume them.

What it changes for an SME

MCP standardizes connections between AI and your tools:

• an assistant that accesses your CRM, documents and emails via the same protocol, without custom integration per tool;
• an AI developer who connects an LLM to a database, a code repository and a dashboard in one configuration instead of several developments;
• an agent that reads your files, writes code and deploys, all using the same MCP servers.

What you should know

MCP is recent but rapidly adopted by the ecosystem. For an SME, the value is preserving integrations: building on MCP avoids recoding each connection when switching models. In fractional AI leadership, we monitor this evolution and integrate it when mature.

What MCP is for

The Model Context Protocol (MCP) is an open standard, launched by Anthropic in late 2024, that describes how an AI assistant connects to tools and data sources. Before it, each integration (CRM, database, messaging) needed custom code for each model. With MCP a "server" exposes its capabilities once, and any compatible assistant can use them.

A concrete example

An MCP server connected to your CRM lets an assistant look up a customer, read the history and prepare an email, without you having written an integration dedicated to that assistant.

Points of caution

• Permissions: give each server the minimum access needed (read-only when possible).
• Trust: only install servers whose source you control, since they perform real actions.
• Traceability: keep a log of calls so you can audit what the agent did.

Frequently asked questions

Does MCP replace APIs? No, it builds on them. MCP standardises how an assistant discovers and calls those APIs.

Is it only for developers? Setup requires a technical profile, but daily use is transparent for teams.