A $100 hat showed up at my door in Kyoto. I paid nothing for it — not for the hat, not for shipping. $0.00.

It wasn't a coupon I found or a sale. The store, humanrequired.shop , only gives that discount to AI agents that can prove a real human is standing behind them . So I made my agent prove it, on-chain, with a zero-knowledge proof. The discount it got back was 100% off. Here's the whole path, because the design held together far better than I expected.

TL;DR

World Foundation's AgentKit lets you prove on-chain that an agent is "human-backed."

humanrequired.shop hands a human-only 100%-off discount to verified agents — once per World ID.

The official Claude Code plugin ( worldcoin/agentkit-shopify-demo ) ships the whole flow as skills.

Result: one "Human in the Loop" Hat, $100 → $0, shipping included , delivered to Japan.

Architecture

[Claude Code] ├─ plugin: agentkit-shopify │ ├─ skill: shopify-agent-discount (SIWE signature → World discount API) │ └─ skill: shopify-storefront (Shopify product…