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gregario/lego-oracle

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LEGO sets, parts, minifigs and inventories from Rebrickable: search and compare sets, find parts by colour, browse themes and discover alternate builds.

gregarioby gregario
GitHubEmbed

About

LEGO sets, parts, minifigs and inventories from Rebrickable: search and compare sets, find parts by colour, browse themes and discover alternate builds.

README

LEGO Oracle

LEGO sets, parts, minifigs, and inventories. An MCP server.

npm version npm downloads MIT Licence Node.js 18+ MCP Compatible lego-oracle MCP server

Ask your AI assistant about LEGO sets, find specific bricks, look up minifigures, browse themes, and compare sets. All backed by Rebrickable's catalog (26k sets, 62k parts, 17k minifigs), not hallucinations.

10 tools. Zero config. Works with every MCP-compatible IDE.

lego-oracle MCP server gregario/lego-oracle MCP server

Install

npx -y lego-oracle

Add to your IDE

Claude Code
claude mcp add lego-oracle -- npx -y lego-oracle
Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%/Claude/claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "lego-oracle": {
      "command": "npx",
      "args": ["-y", "lego-oracle"]
    }
  }
}
Cursor

Add to .cursor/mcp.json:

{
  "mcpServers": {
    "lego-oracle": {
      "command": "npx",
      "args": ["-y", "lego-oracle"]
    }
  }
}
VS Code (Copilot)

Add to .vscode/mcp.json:

{
  "servers": {
    "lego-oracle": {
      "command": "npx",
      "args": ["-y", "lego-oracle"]
    }
  }
}
Windsurf

Add to ~/.codeium/windsurf/mcp_config.json:

{
  "mcpServers": {
    "lego-oracle": {
      "command": "npx",
      "args": ["-y", "lego-oracle"]
    }
  }
}
Zed

Add to settings.json:

{
  "context_servers": {
    "lego-oracle": {
      "command": {
        "path": "npx",
        "args": ["-y", "lego-oracle"]
      }
    }
  }
}

Tools

Set Tools

Tool Description
search_sets Search for sets by name, theme, year, or piece count. Full-text search with filters.
get_set Get complete set details: inventory (grouped by part category), minifigures, theme hierarchy.
compare_sets Compare 2-4 sets side by side: piece count, year, theme, minifigs, shared parts.

Part Tools

Tool Description
search_parts Search parts by name, category, colour, or material.
get_part Get part details including available colours and mold/print variants.
find_part_in_sets Find which sets contain a specific part (optionally in a specific colour), sorted by quantity.

Minifig Tools

Tool Description
search_minifigs Search minifigures by name.
get_minifig Get minifig details and every set it appears in.

Discovery Tools

Tool Description
browse_themes Browse the LEGO theme hierarchy. Top-level themes or drill into sub-themes with set counts.
find_mocs Find community alternate builds (MOCs) for a set's parts.

Data

All data is embedded at build time from Rebrickable. No network calls at runtime.

Category Count
Sets 26,339
Parts 61,702
Colours 275
Minifigures 16,646
Inventory entries 1,483,652
Part relationships 35,757
Themes 490

Data is updated daily via GitHub Actions. New npm versions are published automatically when Rebrickable data changes.

Development

npm install
npm run build
npm test             # 141 tests

To refresh data from Rebrickable:

npm run fetch-data
npm run build

Attribution

Data from Rebrickable. LEGO is a trademark of the LEGO Group. This project is not produced by or endorsed by the LEGO Group.

License

MIT

from github.com/gregario/lego-oracle

Installing gregario/lego-oracle

This server has no published package — it is built from source. Open the repository and follow its README.

▸ github.com/gregario/lego-oracle

FAQ

Is gregario/lego-oracle MCP free?

Yes, gregario/lego-oracle MCP is free — one-click install via Unyly at no cost.

Does gregario/lego-oracle need an API key?

No, gregario/lego-oracle runs without API keys or environment variables.

Is gregario/lego-oracle hosted or self-hosted?

Self-hosted: the server runs locally on your machine via the install command above.

How do I install gregario/lego-oracle in Claude Desktop, Claude Code or Cursor?

Open gregario/lego-oracle on unyly.org, pick your client tab (Claude Desktop, Claude Code, Cursor) and press Install — the config is generated automatically, no JSON editing.

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