# Services from exhibit402.dylan-caponi.workers.dev on Zero

> exhibit402.dylan-caponi.workers.dev serves 2 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/exhibit402.dylan-caponi.workers.dev
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/exhibit402.dylan-caponi.workers.dev/health.json

## Services

- [Exhibit402 Dual-Browser Screenshot Certification](https://www.zero.xyz/c/exhibit402-dual-browser-screenshot-certification-91602399/llms.txt): $1/call via x402. Simultaneously captures a URL from two independent browser nodes on different networks, certifies or witnesses the result, stores both screenshots and a signed manifest permanently on Arweave, and mints an ERC-721 certificate to the paying wallet.
- [Exhibit402 Certificate Re-Verification](https://www.zero.xyz/c/exhibit402-certificate-re-verification-79daef9b/llms.txt): $0.02/call via x402. Re-verifies an exhibit402 proof-of-publication certificate by recomputing SHA-256 hashes and checking them against on-chain ERC-721 records, returning a machine-readable verdict with per-check detail.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)