CLAUDE LIMIT
CUBES
PROOF-OF-USAGE · 2222 ONLY

Mint with
your usage

Don't farm points. Spend your Claude limit. Every 10% of your 5-hour window burned in Claude Code mints one cube — hit 100% and the full ten are yours.

Start minting ▸ How it works
Mint progress
— cubes remaining
0% minted
SPECIMEN · CRYO-01
FACETS 06 · −78°C 0 / 2222
MINTED ON ETHEREUM
◈ PROOF OF USAGE10% = 1 CUBE100% = ALL 102222 SUPPLYETHEREUMNO ALLOWLIST ◈ PROOF OF USAGE10% = 1 CUBE100% = ALL 102222 SUPPLYETHEREUMNO ALLOWLIST
Your usage is the mint

Your session = your cubes

The same bar you watch in Claude is the one that mints. Burn the window, the oracle signs, you mint. No grinding, no allowlist.

LIVE — read from Claude Code
Current session
Resets in — hr — min
0% used
0% used unlocks
0 / 10 cubes
// burn to 100% to claim all ten
Mint authorization
WalletNot connected
NetworkEthereum · Mainnet
StatusAwaiting connection

Run the /limitcubes skill in Claude Code to earn an authorization.

The mint system

Four steps, start to chain

Everything runs from Claude Code. Your usage never leaves your machine in plaintext — only a signed percentage commitment reaches the contract.

STEP 01
⌘

Open Claude Code

Work like you always do. The session tracker watches your 5-hour window.

STEP 02
▸

Run the skill

Invoke the mint skill to read your current usage and request an allocation.

/limitcubes start 0x...
STEP 03
✦

Oracle signs

The oracle converts your % used into a quantity and signs a single-use authorization.

STEP 04
◈

Connect & mint

Open this page, connect your wallet, and the pending authorization mints on Ethereum.

Usage → mint schedule
10%Light session~30 min of a 5-hour window+1
50%Half burn~2.5 hours of focused work+5
100%Full windowthe entire 5-hour limit spent+10
The skill

Claude Code skill

Install the skill to your Claude Code and start earning mint authorizations. Full source code is open.

⌘

/limitcubes

SKILL.md · claude -p + curl, no runtime 
# limitcubes skill

Mint NFTs by spending your Claude Code usage. The skill reads your real usage via claude -p — you never type a number by hand.

## Commands

/limitcubes start 0xYourWallet  # snapshot current usage as baseline
/limitcubes status              # show progress since baseline
/limitcubes claim               # get a signed mint authorization, open browser

## How it works

Pure instructions — no runtime, no scripts. The skill uses
claude -p + curl, which you already have. It reads only your
usage percentage and sends just that number to the backend.

## Privacy

- Never reads config files, tokens, API keys, or your messages
- Sends only: usage %, plan, timestamp
- Never signs anything locally — the site does the on-chain mint

## Rules

- Each 10% of your 5-hour window spent = 1 cube unlocked
- Max 10 cubes per wallet · total supply 2222
- Price: 0.00169 ETH per cube + gas
Install the skill
View on GitHub ↗

Open a terminal (not the Claude chat) and run these two lines — the managed plugin installer:

claude plugin marketplace add Limitcubes/skill claude plugin install limitcubes@limitcubes

Then restart Claude Code and run /limitcubes start 0xYourWallet.

Click to copy. Run these in a normal terminal — macOS Terminal, or the integrated terminal in the VS Code extension (claude plugin … is a terminal command, not a chat slash-command). Works on macOS, Linux, and Windows. Requires local Claude Code on your own machine.

Manual install (terminal, no plugin)

macOS / Linux

mkdir -p ~/.claude/skills/limitcubes && curl -fsSL https://raw.githubusercontent.com/Limitcubes/skill/main/skills/limitcubes/SKILL.md -o ~/.claude/skills/limitcubes/SKILL.md

Windows (PowerShell)

New-Item -ItemType Directory -Force "$env:USERPROFILE\.claude\skills\limitcubes" | Out-Null; Invoke-WebRequest -Uri "https://raw.githubusercontent.com/Limitcubes/skill/main/skills/limitcubes/SKILL.md" -OutFile "$env:USERPROFILE\.claude\skills\limitcubes\SKILL.md"

Run in a real terminal, not the Claude chat — Claude Code blocks writing downloaded files into its skills folder by design. Then restart Claude Code.

Privacy: the skill reads only your usage % (via claude -p) and sends just that number, your plan, and a timestamp. It never reads any config file, tokens, API keys, or messages. Read the source ↗

The collection

The Vault

Every cube is sealed in cryo. Hover a specimen to thaw it and read its traits.

Cube #1
❄ Sealed · #1
Cube #1
Legendary
  • Background Clawd
  • Body Black
  • Eye Angry
  • Suit Magic
Cube #2000
❄ Sealed · #2000
Cube #2000
Rare
  • Body Golden
  • Eye Heart
  • Hat Santa
  • Suit Green
Cube #100
❄ Sealed · #100
Cube #100
Rare
  • Body Pink
  • Eye Conf
  • Hat Cap
  • Suit Clawd
Cube #1337
❄ Sealed · #1337
Cube #1337
Rare
  • Background Human
  • Hat Halo
  • Eye Glasses
  • Suit AI-2
Cube #777
❄ Sealed · #777
Cube #777
Common
  • Background Orange
  • Hat Crown
  • Eye Glasses
  • Body Black
Cube #500
❄ Sealed · #500
Cube #500
Common
  • Background Orange
  • Eye What
  • Suit Green
  • Body Black
Cube #42
❄ Sealed · #42
Cube #42
Common
  • Background Gray
  • Body Blue
  • Hat Cap
  • Suit Doctor
Cube #1
❄ Sealed · #1
Cube #1
Legendary
  • Background Clawd
  • Body Black
  • Eye Angry
  • Suit Magic
Cube #2000
❄ Sealed · #2000
Cube #2000
Rare
  • Body Golden
  • Eye Heart
  • Hat Santa
  • Suit Green
Cube #100
❄ Sealed · #100
Cube #100
Rare
  • Body Pink
  • Eye Conf
  • Hat Cap
  • Suit Clawd
Cube #1337
❄ Sealed · #1337
Cube #1337
Rare
  • Background Human
  • Hat Halo
  • Eye Glasses
  • Suit AI-2
Cube #777
❄ Sealed · #777
Cube #777
Common
  • Background Orange
  • Hat Crown
  • Eye Glasses
  • Body Black
Cube #500
❄ Sealed · #500
Cube #500
Common
  • Background Orange
  • Eye What
  • Suit Green
  • Body Black
Cube #42
❄ Sealed · #42
Cube #42
Common
  • Background Gray
  • Body Blue
  • Hat Cap
  • Suit Doctor
Questions

FAQ

Still stuck? Reach us on X or drop into the community.

Simple: use Claude Code, get NFTs. Your 5-hour usage window is your ticket. Burn 10% of it — that's roughly 30 minutes of active coding — and you unlock 1 cube. Max out the window at 100% and you can claim all 10. No whitelist grinding, no Discord roles, no Twitter tasks. Just code.
Nope. Your prompts and code never leave your machine. The skill reads one number — usage percentage — sends it for verification. We don't see what you're building. The signature expires in 10 min.
0.00169 ETH per cube + gas. Five cubes = 0.00845 ETH. Price is hardcoded in the contract — no surprises.
2,222 total. Hardcoded in the contract. When they're gone, they're gone.
Run /limitcubes claim again. Fresh signature, same usage progress.
10 per wallet, enforced on-chain. Want more? Different wallet, different Claude account.