An MCP client is the artificial intelligence application that connects to an MCP server to use a service: read its data, run its actions. It is the other half of the Model Context Protocol: the server offers tools, the client uses them.
Families of MCP clients
- Major assistants: Claude, ChatGPT, Mistral's Le Chat, and others, depending on their plan.
- Development tools: code editors and programming assistants that add MCP servers to their environment.
- Automation: tools such as n8n, where an AI agent runs a scenario on its own.
- Self-hosted AI: interfaces such as LM Studio or Open WebUI, which give tools to a language model installed inside the company.
How a client connects
- You add the server's address in the client (often in a "connectors" or "tools" menu).
- For a remote server, the client opens the service's sign-in page: you sign in and accept the requested rights, through OAuth.
- The client then sees the list of tools and uses them when useful.
MCP client and Mailpro
- The address of the Mailpro MCP server is in your account, on the AI Assistants page. Each connected client appears in your Mailpro account, with its sending settings, and you can withdraw its access at any time.
Mailpro and AI assistants: connect the client of your choice. Start for free