FastMCP

FastMCP Apps

FastMCP Apps is the framework's runtime for building interactive applications rendered directly inside MCP host conversations. Apps expose UI surfaces — approval flows, choice pickers, form input, and file uploads — alongside prefab and low-level HTML/generative UIs, with `FastMCPApp` as the primary entry point. Apps share the same transport and authentication stack as FastMCP servers, enabling rich agent experiences across Claude Desktop, Claude Code, Cursor, and other MCP-aware hosts.

FastMCP Apps is one of 6 APIs that FastMCP publishes on the APIs.io network.

Tagged areas include MCP, Apps, UI, Interactive, and Python. The published artifact set on APIs.io includes API documentation.

GitHub

Documentation

📖
Documentation
https://gofastmcp.com/apps/overview
📖
Documentation
https://gofastmcp.com/apps/quickstart
📖
Documentation
https://gofastmcp.com/apps/fastmcp-app
📖
Documentation
https://gofastmcp.com/apps/architecture
📖
Documentation
https://gofastmcp.com/apps/prefab
📖
Documentation
https://gofastmcp.com/apps/generative
📖
Documentation
https://gofastmcp.com/apps/low-level
📖
Documentation
https://gofastmcp.com/apps/providers/approval
📖
Documentation
https://gofastmcp.com/apps/providers/choice
📖
Documentation
https://gofastmcp.com/apps/providers/form
📖
Documentation
https://gofastmcp.com/apps/providers/file-upload

API entry from apis.yml

apis.yml Raw ↑ 
aid: fastmcp:fastmcp-apps
name: FastMCP Apps
description: FastMCP Apps is the framework's runtime for building interactive applications rendered directly
  inside MCP host conversations. Apps expose UI surfaces — approval flows, choice pickers, form input,
  and file uploads — alongside prefab and low-level HTML/generative UIs, with `FastMCPApp` as the primary
  entry point. Apps share the same transport and authentication stack as FastMCP servers, enabling rich
  agent experiences across Claude Desktop, Claude Code, Cursor, and other MCP-aware hosts.
humanURL: https://gofastmcp.com/apps/overview
baseURL: ''
tags:
- MCP
- Apps
- UI
- Interactive
- Python
properties:
- type: Documentation
  url: https://gofastmcp.com/apps/overview
- type: Documentation
  name: App Quickstart
  url: https://gofastmcp.com/apps/quickstart
- type: Documentation
  name: FastMCPApp
  url: https://gofastmcp.com/apps/fastmcp-app
- type: Documentation
  name: Architecture
  url: https://gofastmcp.com/apps/architecture
- type: Documentation
  name: Interactive Tools (Prefab)
  url: https://gofastmcp.com/apps/prefab
- type: Documentation
  name: Generative UI
  url: https://gofastmcp.com/apps/generative
- type: Documentation
  name: Custom HTML Apps
  url: https://gofastmcp.com/apps/low-level
- type: Documentation
  name: Approval Provider
  url: https://gofastmcp.com/apps/providers/approval
- type: Documentation
  name: Choice Provider
  url: https://gofastmcp.com/apps/providers/choice
- type: Documentation
  name: Form Input Provider
  url: https://gofastmcp.com/apps/providers/form
- type: Documentation
  name: File Upload Provider
  url: https://gofastmcp.com/apps/providers/file-upload