Tell Holo what you'd like to build, watch it come together brick by brick, then order the real parts and build it yourself.
 The Parthenon · 3,578 |
 Temple of the Great Jaguar · 3,501 |
 Château de Chenonceau · 2,775 |
 742 Evergreen Terrace · 2,187 |
| Describe | Type an idea or drop in a photo, and Holo builds it in 3D while you watch. |
| Trust | Every brick is a real LDraw part, checked to make sure it fits and connects. |
| Replay | Scrub back through the steps, or share the build as a GIF. |
| Tweak | Move, turn, recolor and replace pieces, or walk through the model. |
| Build it for real | Get the instructions as a PDF, an official parts store list, or BrickLink carts through HoloTab. |
| Share | Publish a build so anyone can open it, and builders can remix it into their own. |
you ── idea ──▶ Holo (H Agents API) ── bricks run ──▶ Workstation
▲ │ │
└── 3D model ◀────┴─────────────── model.json.gz ◀──────────┘
Your browser renders every revision and shows it to Holo, so keep the tab open while it builds.
Every build above was made by Holo from a sentence. Live at bricks.hcompany.ai: browse the public builds without an account, sign in with Google or an email to build.
You need Node 24, Python with uv, a free Rebrickable API key, a Vercel Blob store, and an H account from platform.hcompany.ai: signing in mints the Agents API key Holo builds with.
git clone https://github.com/hcompai/holobricks && cd holobricks
scripts/fetch-ldraw.sh # the LDraw parts library (145 MB)
(cd server && uv sync && REBRICKABLE_API_KEY=... .venv/bin/brickyard-catalog) # the parts catalog
server/.venv/bin/python scripts/pack-toolkit.py # the toolkit the app sends Holo
cd web && npm install
printf 'BRICKYARD_SECRET=%s\nBLOB_READ_WRITE_TOKEN=...\n' "$(openssl rand -hex 32)" > .env.local
npm run devOpen http://127.0.0.1:5173 and sign in with your H account. sh setup.sh installs the toolkit's bricks command on your own machine, as Holo does on its workstation.