Constellation MCP Server

Give your AI coding assistant instant, intelligent access to your entire codebase's structure, dependencies, and relationships without transmitting any source code. Constellation provides code intelligence as a service to AI coding assistant tools.

Quick Start

Add the Constellation MCP server to your AI assistant project-level config (or system-level if your tooling doesn't support project-level configuration):

{
  "mcpServers": {
    "constellation": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "@constellationdev/mcp@latest"],
      "env": {
        "CONSTELLATION_ACCESS_KEY": "${CONSTELLATION_ACCESS_KEY}"
      }
    }
  }
}

[!NOTE] The above example is a generic format for the .mcp.json file used by some tools such as VSCode and Claude Code.

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Rather than directly configuring the MCP server, it is recommended to install and utilize official Constellation Plugins for optimal performance and behavior!

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For information on configuring other AI assistants see the MCP Server > Installation doc.

For further instructions regarding authentication, project setup, and configuration refer to the official docs.

How It Works

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flowchart LR
    subgraph local["💻 Your Environment"]
        direction TB
        code["📂 Source Code"]
        cli["⚙️ Constellation CLI"]
        ai["🤖 AI Coding Assistant"]
        mcp["🧩 Constellation MCP"]
        code --> cli
    end

    subgraph cloud["✨ Constellation Service"]
        direction TB
        api["🔌  API"]
        graphdb[("🧠 Knowledge Graph")]
        api <--> graphdb
    end

    cli a1@-->|"Metadata Upload"| api
    ai <-->|"Tool Calls"| mcp
    mcp a2@<-->|"Queries"| api

    a1@{ animation: fast }
    a2@{ animation: fast }

    style local fill:#1F1F28
    style cloud fill:#1F1F28,stroke:#4A90E2
    style cli stroke:#4A90E2
    style mcp stroke:#4A90E2
    style api stroke:#4A90E2
    style graphdb stroke:#4A90E2

1. Parse and Analyze: The CLI tool analyzes source code in _your_ environment, extracting structural metadata (functions, classes, variables, imports, calls, references, etc.)
2. Upload: Only the metadata is securely sent to Constellation, never raw source code
3. Query: AI assistants use the Constellation MCP tool to send complex queries, and get rapid answers derived from the knowledge graph

Documentation

Find the full and comprehensive documentation at [docs.constellationdev.io/mcp/](https://docs.constellationdev.io/mcp/)

• Installation & Setup - Configure for Claude Code, Cursor, GitHub Copilot, and more
• Tools Reference - Code Mode API and available methods
• Troubleshooting - Common issues and solutions

Privacy & Security

• No source code transmission - Only metadata and relationships
• Access control - API keys required for all requests
• Branch isolation - Each git branch maintains discrete code intelligence

For comprehensive information regarding privacy and security, see the official Privacy & Security documentation.

Support

• Documentation: docs.constellationdev.io
• Report Issues: GitHub Issues

License

AGPL-3.0 - See LICENSE for details.

Copyright © 2026 ShiftinBits Inc.