ChromaDB MCP Server

A Model Context Protocol (MCP) server that queries a local ChromaDB instance to provide relevant documents to GitHub Copilot.

Prerequisites

• Node.js (v18 or later)

• A running ChromaDB instance at http://127.0.0.1:8000

• A collection named ExchangeResearch in your ChromaDB instance

Related MCP server: Knowledge Base MCP Server

Installation

1. Install dependencies:

   npm install

2. Build the project:

   npm run build

Configuration

The MCP server is configured in .vscode/settings.json to integrate with GitHub Copilot in VS Code.

To use it globally (across all projects), add this to your User Settings (settings.json):

{
  "github.copilot.chat.mcp.servers": {
    "chromadb": {
      "command": "node",
      "args": ["c:/source/chroma-mcp/build/index.js"]
    }
  }
}

Replace the path with the absolute path to your built index.js file.

Usage

Once configured, the MCP server will automatically start when you use GitHub Copilot in VS Code. You can use the query_chromadb tool in your Copilot conversations:

Example prompts:

• "Query ChromaDB for information about exchange APIs"

• "Search the ExchangeResearch collection for trading strategies"

• "Find documents related to market data"

The tool will automatically query your ChromaDB collection and provide relevant context to Copilot.

Tool Details

query_chromadb

Queries the ChromaDB ExchangeResearch collection for relevant documents.

Parameters:

• query (required): The search query string

• nResults (optional): Number of results to return (default: 5)

Returns: An array of documents with metadata and similarity distances.

Development

To rebuild the project after making changes:

npm run build

For continuous development with auto-rebuild:

npm run dev

Customization

To use a different ChromaDB URL or collection name, edit src/index.ts:

const chromaClient = new ChromaDbClient('http://127.0.0.1:8000', 'ExchangeResearch');

Troubleshooting

• Server not responding: Ensure ChromaDB is running at http://127.0.0.1:8000

• Tool not appearing: Restart VS Code after adding the MCP configuration

• Build errors: Check that you have Node.js v18+ and run npm install again

This project is licensed under the MIT License.