Atlas

Local MCP server for codebase ingestion, AI-powered query, impact analysis, and edge-case detection.

Atlas gives AI coding assistants (Claude, Cursor, Windsurf, VS Code) a structured knowledge base of your codebase — so they make 1 tool call instead of 15.

Without Atlas: Claude opens 7 files, runs 5 greps, makes 15 tool calls to understand context
With Atlas:    1 call to atlas_query. Done.

Measured 93% reduction in tool-call overhead per coding task.

How it works

Atlas runs as a local MCP server. It indexes your codebase into a local Meilisearch instance, then exposes 5 tools your AI client calls over stdio — no cloud, no API key, no data leaving your machine.

The five tools

Supported languages

Python, JavaScript, TypeScript, Go, Rust, Java, C#, C, C++, Ruby, PHP, Swift, Kotlin, Scala, Lua, Elixir, Dart, Zig

Cross-language bridge detection

Atlas detects relationships that span language boundaries:

• HTTP/REST route matching between frontend and backend
• Shared environment variable references
• Shared config file references
• Database schema/table bridges across ORMs
• Shared type/interface definitions

Installation

pip install atlas-mcp
atlas init

atlas init will:

1. Download and start Meilisearch locally
2. Crawl and index your codebase
3. Write the MCP config to .claude/settings.json

MCP config (Claude Desktop / VS Code)

{
  "mcpServers": {
    "atlas": {
      "command": "python",
      "args": ["-m", "atlas.server"],
      "env": { "ATLAS_KEY": "your-licence-key" }
    }
  }
}

Pricing

Get your licence key at hornsa.com/atlas

Open-core model

The ingestion pipeline, MCP server, call graph walker, and model architecture are open source (Apache 2.0).

The training pipeline, trained model weights, and verifier bridge are proprietary — distributed to paid licence holders only.

Requirements

• Python 3.11+
• 4 GB RAM (8 GB recommended for large codebases)
• 2 GB disk (Meilisearch + weights)
• Internet required at install and for daily licence token refresh

Support

• Issues: github.com/horn-software/atlas/issues
• Email: hello@hornsoftwarearchitects.co.za
• Docs: hornsa.com/atlas/docs

Built by Horn Software Architects