Vega-Lite & Deneb MCP Server

A Model Context Protocol (MCP) server that provides AI assistants with access to Vega-Lite and Deneb documentation, examples, and validation tools.

What it does

This server enables AI assistants like Claude to:

🔍 Search Vega-Lite and Deneb documentation
📊 Get visualization examples by category
✅ Validate Vega-Lite specifications
📖 Access schema information
💼 Power BI integration via Deneb documentation

Quick Start

1. Install

# Clone the repository git clone https://github.com/inteligencianegociosmmx/vegaLite_mcp_server.git cd vegaLite_mcp_server # Install dependencies and build npm install npm run build

2. Configure

Claude Code (VS Code) - Recommended ⭐

# One command installation claude mcp add vegalite node /path/to/vegaLite_mcp_server/dist/index.js

Then completely close and reopen VS Code (important - don't just reload).

Claude Desktop

Edit your config file:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
Windows: %APPDATA%\Claude\claude_desktop_config.json
Linux: ~/.config/Claude/claude_desktop_config.json

Add:

{ "mcpServers": { "vegalite": { "command": "node", "args": ["/absolute/path/to/vegaLite_mcp_server/dist/index.js"] } } }

Restart Claude Desktop.

3. Verify

Claude Code: Type /mcp - you should see "vegalite" listed

Claude Desktop: Look for the 🔨 tools indicator

4. Try it

Search for "bar chart" in Vega-Lite

Show me a scatter plot example

Validate this spec: {"$schema": "https://vega.github.io/schema/vega-lite/v5.json", "mark": "bar", ...}

Available Tools

Tool	What it does	Example
`search_docs`	Search Vega-Lite and Deneb docs	"How do filter transforms work?" or "How does Deneb work with Power BI?"
`get_example`	Get examples by category	"Show me a line chart example"
`validate_spec`	Validate JSON specs	"Validate this Vega-Lite spec: {...}"
`get_schema_info`	Get schema details	"What encoding channels are available?"

🆕 Deneb Support

Deneb is a certified custom visual for Microsoft Power BI that uses Vega-Lite. This server now includes Deneb documentation to help Power BI users:

Understand how to use Vega-Lite in Power BI
Learn about Power BI-specific features (cross-filtering, tooltips, etc.)
Get examples specific to the Power BI context

Try: "How do I use cross-filtering in Deneb?" or "What's the difference between Vega-Lite and Deneb?"

Troubleshooting

Server not showing up?

Check the path is absolute and correct
Test manually: node /path/to/dist/index.js (should say "running on stdio")
For Claude Code: Completely close and reopen VS Code (not just reload)
Verify with /mcp (Claude Code) or look for tools indicator (Claude Desktop)

Tools not working?

npm run build # Rebuild the project

Remove the server:

claude mcp remove vegalite # Claude Code # Or manually delete from config file

Development

npm run watch # Auto-rebuild on changes npm run scrape # Fetch latest Vega-Lite docs

Project Structure

src/ ├── index.ts # Main MCP server ├── tools/ │ ├── search.ts # Documentation search │ ├── examples.ts # Example retrieval │ └── validate.ts # Spec validation └── utils/ └── scraper.ts # Documentation scraper

Manual Configuration

Claude Code (Manual)

Press Ctrl+Shift+P (or Cmd+Shift+P on Mac)
Type: Claude Code: Edit MCP Settings
Add:

{ "mcpServers": { "vegalite": { "command": "node", "args": ["/absolute/path/to/dist/index.js"] } } }

Save and completely close/reopen VS Code

Other MCP Clients

Add the same configuration to your client's MCP settings file. Check your client's documentation for the config file location.

Contributing

Contributions welcome! Please submit a Pull Request.

See CONTRIBUTING.md for development guidelines.

Future Features

For information about deploying as a remote server, see docs/DEPLOYMENT.md.

License

MIT License - See LICENSE

Links

Issues: https://github.com/inteligencianegociosmmx/vegaLite_mcp_server/issues
Vega-Lite Docs: https://vega.github.io/vega-lite/
MCP Docs: https://modelcontextprotocol.io

Built with

Deploy Server

A

security – no known vulnerabilities

A

license - permissive license

A

quality - confirmed to work

How are these scores calculated?

Related Resources

GitHub Repository

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Vega-Lite MCP Server