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Jonathan Hefner 79670b4dcd
 Add safeAreaInsets support to all example apps (#202) 
Apply host-provided safe area insets as padding on main containers
across all examples. This ensures content doesn't render under
system UI elements like phone notches.

React apps use `useState` + `onhostcontextchanged` handler with
initial fetch via `getHostContext()` in `useEffect`. Vanilla JS
apps apply padding in the handler and invoke it after `connect()`.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
2026-01-08 18:03:13 +00:00
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src Add safeAreaInsets support to all example apps (#202) 2026-01-08 18:03:13 +00:00
mcp-app.html Add color-scheme meta tag to all example apps 2025-12-15 11:42:18 -08:00
package.json Fix build errors in examples (#180) 2025-12-18 11:17:23 +00:00
README.md Add wiki-explorer-server example (#122) 2025-12-11 13:58:05 +01:00
server.ts Clean up examples (#182) 2025-12-19 11:44:27 +00:00
tsconfig.json Add wiki-explorer-server example (#122) 2025-12-11 13:58:05 +01:00
vite.config.ts Add wiki-explorer-server example (#122) 2025-12-11 13:58:05 +01:00

README.md

Example: Wiki Explorer

Visualizes Wikipedia link graphs using a force-directed layout. Explore how Wikipedia pages are connected by expanding nodes to reveal first-degree links.

Zoomed Pop-up Expanded graph

Features

  • Force-directed graph visualization: Interactive graph powered by force-graph
  • Node expansion: Click any node to expand and see all pages it links to
  • Visual state tracking: Nodes change color based on state (blue = default, green = expanded, red = error)
  • Direct page access: Open any Wikipedia page in your browser

Running

  1. Install dependencies:

    npm install

  2. Build and start the server:

    npm run start:http  # for Streamable HTTP transport
# OR
npm run start:stdio  # for stdio transport

  3. View using the basic-host example or another MCP Apps-compatible host.

Tool Input

To test the example, call the get-first-degree-links tool with a Wikipedia URL:

{
  "url": "https://en.wikipedia.org/wiki/Graph_theory"
}

Click nodes in the graph to Open (view in browser) or Expand (visualize linked pages).

Architecture

Server (server.ts)

MCP server that fetches Wikipedia pages and extracts internal links.

Exposes one tool:

  • get-first-degree-links - Returns links to other Wikipedia pages from a given page

App (src/mcp-app.ts)

Vanilla TypeScript app using force-graph for visualization that:

  • Receives tool inputs via the MCP App SDK
  • Renders an interactive force-directed graph
  • Supports node expansion to explore link relationships