d03123bb5c* docs: add local development MCP client configuration to READMEs Add instructions for configuring MCP clients to use locally-cloned and modified servers. This allows developers to test local changes with MCP clients like Claude Desktop or VS Code. - Top-level README: Added 'Local Development' section after npx config - All TypeScript examples: Added 'Local Development' subsection with bash one-liner that builds and runs the server - Python examples (qr-server, say-server): Added local path config * docs: include all servers in local development config * docs: use bash wrapper for Python server configs to enable tilde expansion
102 lines
3.1 KiB
Markdown
102 lines
3.1 KiB
Markdown
# 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.
|
|
|
|
<table>
|
|
<tr>
|
|
<td><a href="https://modelcontextprotocol.github.io/ext-apps/screenshots/wiki-explorer-server/01-zoomed.png"><img src="https://modelcontextprotocol.github.io/ext-apps/screenshots/wiki-explorer-server/01-zoomed.png" alt="Zoomed" width="100%"></a></td>
|
|
<td><a href="https://modelcontextprotocol.github.io/ext-apps/screenshots/wiki-explorer-server/02-pop-up.png"><img src="https://modelcontextprotocol.github.io/ext-apps/screenshots/wiki-explorer-server/02-pop-up.png" alt="Pop-up" width="100%"></a></td>
|
|
<td><a href="https://modelcontextprotocol.github.io/ext-apps/screenshots/wiki-explorer-server/03-expanded-graph.png"><img src="https://modelcontextprotocol.github.io/ext-apps/screenshots/wiki-explorer-server/03-expanded-graph.png" alt="Expanded graph" width="100%"></a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
## MCP Client Configuration
|
|
|
|
Add to your MCP client configuration (stdio transport):
|
|
|
|
```json
|
|
{
|
|
"mcpServers": {
|
|
"wiki-explorer": {
|
|
"command": "npx",
|
|
"args": [
|
|
"-y",
|
|
"--silent",
|
|
"--registry=https://registry.npmjs.org/",
|
|
"@modelcontextprotocol/server-wiki-explorer",
|
|
"--stdio"
|
|
]
|
|
}
|
|
}
|
|
}
|
|
```
|
|
|
|
### Local Development
|
|
|
|
To test local modifications, use this configuration (replace `~/code/ext-apps` with your clone path):
|
|
|
|
```json
|
|
{
|
|
"mcpServers": {
|
|
"wiki-explorer": {
|
|
"command": "bash",
|
|
"args": ["-c", "cd ~/code/ext-apps/examples/wiki-explorer-server && npm run build >&2 && node dist/index.js --stdio"]
|
|
}
|
|
}
|
|
}
|
|
```
|
|
|
|
## Features
|
|
|
|
- **Force-directed graph visualization**: Interactive graph powered by [`force-graph`](https://github.com/vasturiano/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:
|
|
|
|
```bash
|
|
npm install
|
|
```
|
|
|
|
2. Build and start the server:
|
|
|
|
```bash
|
|
npm run start:http # for Streamable HTTP transport
|
|
# OR
|
|
npm run start:stdio # for stdio transport
|
|
```
|
|
|
|
3. View using the [`basic-host`](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/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:
|
|
|
|
```json
|
|
{
|
|
"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
|