Examples

Example apps you can run right now.

Each tile below is a working FastMCP server you can run with fastmcp dev apps or connect to from any MCP host. Source lives in examples/apps/ in the repository.

Sales Dashboard

Metrics, charts, and deal pipeline

System Monitor

Live CPU, memory, disk with auto-refresh

Quiz

LLM-generated trivia with scoring

Interactive Map

Geocoded addresses on Leaflet

File Upload

Drag-and-drop upload provider

Approval

Human-in-the-loop confirmation

Choice

Clickable option selection

Form Input

Pydantic model forms

Generative UI

LLM writes the UI at runtime

Running the examples

Preview any example in your browser with the dev server:

pip install "fastmcp[apps]"
fastmcp dev apps examples/apps/sales_dashboard/sales_dashboard_server.py

The dev UI lets you pick a tool and fill in arguments. In a real deployment the LLM provides those arguments from conversation context — the quiz example especially shines when connected to a host like Goose or Claude Desktop, where the LLM generates the questions itself.

Standalone apps

Sales dashboard

A full dashboard with KPI metrics, revenue trends, segment breakdown, and a deal pipeline table. Shows what you can build with a single app=True tool and Prefab’s chart and data components.

fastmcp dev apps examples/apps/sales_dashboard/sales_dashboard_server.py

System monitor

Reads live CPU, memory, and disk stats from your machine using psutil. Auto-refreshes via SetInterval calling a backend tool, with a dropdown to control the refresh rate. The chart accumulates up to 100 data points over time.

pip install psutil
fastmcp dev apps examples/apps/system_monitor/system_monitor_server.py

Quiz

The LLM generates trivia questions and passes them to the tool. The user answers via buttons, sees correct/incorrect feedback, and tracks score across questions. Demonstrates multi-turn client-side state with FastMCPApp.

fastmcp dev apps examples/apps/quiz/quiz_server.py

Interactive map

Accepts addresses or place names, geocodes them via OpenStreetMap Nominatim (free, no API key), and renders an interactive Leaflet map using Prefab’s Embed component with inline HTML. A reminder that Prefab apps can break out of built-in components when they need to.

fastmcp dev apps examples/apps/map/map_server.py

For ready-made building blocks like approvals, choice pickers, file uploads, and Pydantic forms, see the Providers group.