Practical MCP with FastMCP & LangChain

Connecting Apps to our MCP Server

At this level, since we have a public URL for our MCP server (ngrok URL), we can connect any application to it. For example:

• Claude Code: A code assistant that can call tools and runs in the terminal.

• Claude Desktop: Anthropic's Claude models integrated into a desktop application with a user-friendly interface.

• GitHub Copilot in VS Code: You can add an MCP server to the list of tools that Copilot can call to assist you while coding.

• ChatGPT: You can create a custom app using ChatGPT UI and connect it to your MCP server to leverage the tool-calling capabilities of ChatGPT.

• ..and so on.

Every tool has its own way of connecting to external tools:

• For example, in Claude Code, you can simply run a command like claude mcp add --transport http stripe https://abc123.ngrok-free.app/mcp to add your MCP server as a tool that Claude can call.

• In Claude Desktop, you can use the UI or a JSON configuration file to add your MCP server as a tool and so on.