| Filename | Latest commit message | Latest commit date |
|---|---|---|
75ecd62384* map-server: fix async/await in ontoolresult, remove unused getViewStorageKey * fix(map-server): improve updateModelContext and fix initialization - Use structured YAML frontmatter format for model context (like pdf-server) - Add tool name, altitude, and cleaner data format - Fix initialization deadlock: app.connect() was inside ontoolresult handler which could never fire until connected - Fix view state persistence: widgetUUID now properly extracted from ontoolresult and used to restore persisted camera position - Server now includes widgetUUID in tool result _meta for widget identification * fix(pdf-server): use widgetUUID for page persistence - Add widgetUUID to tool result _meta for widget identification - Use widgetUUID instead of generated key (pdfUrl+toolId) for localStorage - Enables reliable page restoration when revisiting PDF widgets * fix(transcript-server): use structured YAML frontmatter for model context - Add tool name, listening status, and unsent entry count in frontmatter - Consistent format with pdf-server and map-server * update names * drop bogus altitude * Update mcp-app.ts |
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| .. | ||
| src | ||
| .gitignore | ||
| grid-cell.png | ||
| mcp-app.html | ||
| package.json | ||
| README.md | ||
| screenshot.png | ||
| server-utils.ts | ||
| server.ts | ||
| test-standalone.html | ||
| tsconfig.json | ||
| vite.config.ts | ||
Example: Interactive Map
Interactive 3D globe viewer using CesiumJS with OpenStreetMap tiles. Demonstrates geocoding integration and full MCP App capabilities.
Features
- 3D Globe Rendering: Interactive CesiumJS globe with rotation, zoom, and 3D perspective
- Geocoding: Search for places using OpenStreetMap Nominatim (no API key required)
- OpenStreetMap Tiles: Uses free OSM tile server (no Cesium Ion token needed)
- Dynamic Loading: CesiumJS loaded from CDN at runtime for smaller bundle size
Running
-
Install dependencies:
npm install -
Build and start the server:
npm run start:http # for Streamable HTTP transport # OR npm run start:stdio # for stdio transport -
View using the
basic-hostexample or another MCP Apps-compatible host.
Tools
geocode
Search for places by name or address. Returns coordinates and bounding boxes.
{
"query": "Eiffel Tower"
}
Returns up to 5 matches with lat/lon coordinates and bounding boxes.
show-map
Display the 3D globe zoomed to a bounding box.
{
"west": 2.29,
"south": 48.85,
"east": 2.3,
"north": 48.86,
"label": "Eiffel Tower"
}
Defaults to London if no coordinates provided.
Architecture
Server (server.ts)
Exposes two tools:
geocode- Queries OpenStreetMap Nominatim API with rate limitingshow-map- Renders the CesiumJS globe UI at a specified location
Configures Content Security Policy to allow fetching tiles from OSM and Cesium CDN.
App (src/mcp-app.ts)
Vanilla TypeScript app that:
- Dynamically loads CesiumJS from CDN
- Initializes globe with OpenStreetMap imagery (no Ion token)
- Receives tool inputs via the MCP App SDK
- Handles camera navigation to specified bounding boxes
Key Files
server.ts- MCP server with geocode and show-map toolsmcp-app.html/src/mcp-app.ts- CesiumJS globe UIserver-utils.ts- HTTP server utilities
Notes
- Rate limiting is applied to Nominatim requests (1 request per second per their usage policy)
- The globe works in sandboxed iframes with appropriate CSP configuration
- No external API keys required - uses only open data sources