MCP Demos

8 runnable demos showcasing Model Context Protocol capabilities - from text-only tools to interactive MCP Apps with bidirectional communication.

Quick Start

node --version   # Requires Node 20+
npm install
npm run dev      # Start MCP server (stdio transport)

For production:

npm run build
npm start

VS Code Configuration

Add to .vscode/settings.json to auto-discover the server:

{
  "mcp": {
    "servers": {
      "mcpdemos": {
        "command": "node",
        "args": ["dist/index.js"],
        "cwd": "${workspaceFolder}"
      }
    }
  }
}

For development with tsx:

{
  "mcp": {
    "servers": {
      "mcpdemos": {
        "command": "npx",
        "args": ["tsx", "src/index.ts"],
        "cwd": "${workspaceFolder}"
      }
    }
  }
}

Demos

#	Demo	Category	Tools	Resources
1	Polite CLI vs Teammate	Hook	`demo1_polite_cli`	-
2	Elicitation Mid-Flow	Negotiation	`demo2_scaffold_start`, `demo2_scaffold_confirm`	-
3	Secure OAuth Handoff	Security	`demo3_request_consent`, `demo3_approve_consent`, `demo3_protected_action`	-
4	Async Progress	Coordination	`demo4_start_pipeline`, `demo4_check_progress`	-
5	Cancel / Retry / Resume	Coordination	`demo5_cancel_task`, `demo5_retry_task`, `demo5_list_tasks`	-
6	Colour Picker	Shared Artifacts	`demo6_save_color`, `demo6_get_palette`	`ui://color-picker`
7	Component Gallery	Shared Artifacts	`demo7_gallery_state`	`ui://component-gallery`
8	Export Artifacts	Platform	`demo8_export_report`, `demo8_list_exports`	-

Runbooks

ShowRun All Demos - All Demos Walkthrough Script
5-Minute Runbook - Quick highlights (Demos 1, 2, 3, 4, 6, 8)
15-Minute Runbook - Full walkthrough with stage timing for all 8 demos

Architecture

src/
  index.ts                     ← Server entry point (stdio transport)
  demos/
    demo1-polite-cli.ts        ← Tool: verbose CLI responses
    demo2-elicitation.ts       ← Tools: scaffold start + confirm
    demo3-oauth.ts             ← Tools: consent → approve → action
    demo4-async-progress.ts    ← Tools: pipeline + progress polling
    demo5-cancel-retry.ts      ← Tools: cancel, retry, list tasks
    demo6-color-picker.ts      ← Tool + Resource: colour picker UI
    demo7-component-gallery.ts ← Tool + Resource: gallery UI
    demo8-export-artifacts.ts  ← Tool: report generation
examples/
  demo{1-8}/README.md          ← Per-demo docs with stage scripts
docs/
  5-minute-runbook.md
  15-minute-runbook.md
outputs/                        ← Generated reports (Demo 8)

Graceful Degradation

If a host doesn't support MCP Apps (ui:// resources), all demos fall back to text-only tool interactions. The UI resources are optional enhancements.

Dependencies

@modelcontextprotocol/sdk - MCP server framework
zod - Schema validation
tsx (dev) - TypeScript execution
No external APIs, databases, or cloud services required

Licence

MIT