# Introduction

Permanent on-chain canvas. Own pixels, create art, trade on the marketplace.

## What is NonceArt?

[NonceArt](https://nonce.art) is a collaborative pixel art canvas where ownership lives permanently on the blockchain. Think Million Dollar Homepage meets NFTs, but fully decentralized with no custom smart contract. Gasless thanks to [x402 protocol](https://x402.org).

**Canvas**: 2,400 × 1,675 pixels (4,020,000 total pixels)

**Key Features**:

* **Own pixels permanently**: 0.99 USDC per pixel (1 USDC total with painting)
* **No gas fees**: Gasless transactions via x402 protocol
* **Set URLs and descriptions**: Turn your tiles into clickable links
* **Peer-to-peer marketplace**: Buy and sell tiles directly
* **On-chain forever**: Data stored in USDC contract nonces

**How It Works**:

1. Reserve canvas area (1% upfront)
2. Complete payment (98% remaining)
3. Paint and customize your tile
4. List for sale or keep forever

## Getting Started

**Prerequisites**:

* Web3 wallet (MetaMask, Coinbase Wallet, etc.)
* USDC on Base network
* No ETH required (x402 facilitators sponsor gas)

**Quick Start**:

1. Visit [nonce.art](https://nonce.art)
2. Connect your wallet
3. Browse the canvas
4. Reserve your first tile

## Documentation Structure

This documentation covers:

* **User Guide** (Sections 1-8): How to use NonceArt
* **Technical Specification** (Section 9+): Architecture, encoding, operations

New users: Start with [Getting Started](https://nonceart.gitbook.io/docs/user-guide/02-getting-started).

Technical users: Jump to [Architecture Overview](https://nonceart.gitbook.io/docs/technical-specification/architecture).

## Support

* Website: [nonce.art](https://nonce.art)
* Questions: See [FAQ](http://nonce.art/faq)

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**Important**: All USDC payments are final. No refunds. You own your pixels permanently after full payment.