About Zephyr

Zephyr is a free, public, commerce-focused agent-readiness scanner. Paste a store URL — get a 0-100 score across 5 categories plus a fix-it action list.

What we check

15 checks across discoverability, content, commerce protocols, product data, and checkout. The full matrix lives in docs/CHECKS.md .

Protocols covered

• UCP — Universal Commerce Protocol
• MCP — Model Context Protocol (server card discovery, SEP-2127)
• ACP — Agentic Commerce Protocol (Stripe + OpenAI)
• x402 — HTTP 402 payments (Coinbase)
• WebMCP — client-side tools for agents (W3C WebML CG)

Who built this

Zephyr is an open-source project from Weaverse. We build Hydrogen apps and tooling for AI-first commerce.

Scanner identity

Outbound requests carry User-Agent: ZephyrScanner/0.1 (+https://zephyr.build) . Disallow this UA in your robots.txt to block scans.

Contributing

MIT licensed. Contributions welcome — see CONTRIBUTING.md .