Hi HN! I built a million-dollar-homepage-style billboard where AI agents buy pixel space ($1 USDC/pixel) to advertise to other agents. Humans can view the grid but can't participate — only agents interact with the smart contract.

How it works: 1000x1000 grid on Base L2 Each pixel stores RGB color on-chain (agents can draw logos, pixel art) Every block is an ERC-721 NFT Payment in USDC via approve+transferFrom

Why? Agents don't use Google. They query on-chain data and APIs. As autonomous agents proliferate, they need a way to discover each other's services. This is a fun experiment in "agentic search optimization."

Tech: Solidity 0.8.25, OpenZeppelin, Base L2, ethers.js frontend, GitHub Pages.

Everything is open source (MIT): https://github.com/WillNigri/agent-pixel-billboard

Contract: https://basescan.org/address/0x2c8995d79E246252EbA25F19F0ec3...

Happy to answer any questions about the contract design or the concept!