Cesium MCP Dev

cesium-mcp-dev

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MCP Server for IDE AI assistants -- Cesium API documentation, code generation, and Entity builder.

What is this?

cesium-mcp-dev helps AI coding assistants (GitHub Copilot, Cursor, Claude Code, etc.) write better CesiumJS code by providing API documentation lookup, code snippet generation, and Entity configuration building -- all through the MCP protocol.

The stable stdio server uses MCP SDK v2 and negotiates both MCP 2025-11-25 and 2026-07-28 clients.

IDE AI Assistant <--MCP stdio--> cesium-mcp-dev --> API docs, code snippets, Entity configs

Install & Run

npx -y cesium-mcp-dev

IDE Configuration

VS Code (Copilot)

In .vscode/mcp.json:

{

"servers": { "cesium-dev": { "command": "npx", "args": ["cesium-mcp-dev"] } } }

Cursor

In .cursor/mcp.json:

{

"mcpServers": { "cesium-dev": { "command": "npx", "args": ["cesium-mcp-dev"] } } }

Claude Desktop

{

"mcpServers": { "cesium-dev": { "command": "npx", "args": ["cesium-mcp-dev"] } } }

MCP Tools (3)

cesium_api_lookup

Query Cesium API documentation by class name, method, or property.

Input: "Viewer"

Output: Constructor signature, properties, methods, and usage examples

Covered classes: Viewer, Entity, Camera, Cartesian3, Color, GeoJsonDataSource, ImageryLayer, Cesium3DTileset, Material, ScreenSpaceEventHandler, flyTo, setView (12 classes)

cesium_code_gen

Generate Cesium code from natural language descriptions.

Input: "Add a red point marker at Tiananmen Square"

Output: Complete TypeScript code snippet ready to use

Built-in snippets: fly to location, add marker, load GeoJSON, draw polyline, draw polygon, load 3D Tiles, switch basemap, click handler, screenshot, heatmap, trajectory animation (11 scenarios)

cesium_entity_builder

Build Entity configurations interactively by specifying type and properties.

Input: type: "polygon", position: {lon: 116.4, lat: 39.9}, color: "#ff6600"

Output: Complete Entity definition with material, style, and ground clamping

Supported types: point, billboard, label, polyline, polygon, model, ellipse, box (8 types)

Example Interactions

AI assistant asks: "How do I load a 3D Tiles model from Cesium Ion?"

The assistant calls cesium_api_lookup with "Cesium3DTileset", gets the API reference, then calls cesium_code_gen with the user's specific requirements to generate ready-to-use code.

AI assistant asks: "Create an Entity for a semi-transparent blue polygon"

The assistant calls cesium_entity_builder with type: "polygon", color: "#0066ff", opacity: 0.5 and gets complete code output.

Compatibility

License

MIT