Data Visualization MCP Server

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2 
3# Data Visualization MCP Server
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5 
6## Overview
7A Model Context Protocol (MCP) server implementation that provides the LLM an interface for visualizing data using Vega-Lite syntax.
8 
9## Components
10 
11### Tools
12The server offers two core tools:
13 
14- `save_data`
15   - Save a table of data agregations to the server for later visualization
16   - Input:
17     - `name` (string): Name of the data table to be saved
18     - `data` (array): Array of objects representing the data table
19   - Returns: success message
20- `visualize_data`
21   - Visualize a table of data using Vega-Lite syntax
22   - Input:
23     - `data_name` (string): Name of the data table to be visualized
24     - `vegalite_specification` (string): JSON string representing the Vega-Lite specification
25   - Returns: If the `--output_type` is set to `text`, returns a success message with an additional `artifact` key containing the complete Vega-Lite specification with data. If the `--output_type` is set to `png`, returns a base64 encoded PNG image of the visualization using the MPC `ImageContent` container.
26 
27## Usage with Claude Desktop
28 
29```python
30# Add the server to your claude_desktop_config.json
31{
32  "mcpServers": {
33    "datavis": {
34        "command": "uv",
35        "args": [
36            "--directory",
37            "/absolute/path/to/mcp-datavis-server",
38            "run",
39            "mcp_server_datavis",
40            "--output_type",
41            "png" # or "text"
42        ]
43    }
44  }
45}
46```
47