FastMCP Hands-on Lab

Example Use Cases

• 1

  Run or test lightweight MCP servers locally to prototype integrations before deploying to production.

• 2

  Auto-launch MCP servers via client configuration (e.g., Cursor) so tools and assistants can call custom endpoints on demand.

• 3

  Example Deno-based MCP implementations (such as simple utility endpoints like counting string length) to learn patterns and extend functionality.

Description

This repository provides example MCP server code and step-by-step instructions to run FastMCP/Mastra servers locally using Deno. It shows how to configure an MCP-capable client (e.g., Cursor) to auto-start servers and includes a simple example (count-string-length) to illustrate interaction patterns. It's useful for developers who want to experiment with writing, running, and integrating lightweight MCP servers into agent workflows. References to the upstream fastmcp project and a related Zenn article are included for further reading.