Lego Oracle
FreeMaintainedAsk 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
About
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.
README
LEGO Oracle
LEGO sets, parts, minifigs, and inventories. An 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
Install Lego Oracle in Claude Desktop, Claude Code & Cursor
unyly install lego-oracleInstalls into Claude Desktop, Claude Code, Cursor & VS Code — handles npx, uvx and build-from-source repos for you.
First time? Get the CLI: curl -fsSL https://unyly.org/install | sh
Or configure manually
Run in your terminal:
claude mcp add lego-oracle -- npx -y lego-oracleStep-by-step: how to install Lego Oracle
FAQ
Is Lego Oracle MCP free?
Yes, Lego Oracle MCP is free — one-click install via Unyly at no cost.
Does Lego Oracle need an API key?
No, Lego Oracle runs without API keys or environment variables.
Is Lego Oracle hosted or self-hosted?
A hosted option is available: Unyly runs the server in the cloud, no local setup required.
How do I install Lego Oracle in Claude Desktop, Claude Code or Cursor?
Open 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.
Changes
Versions and requested access over time.
- New version published
- New version published
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