Marketplace · API · x402

exhibit402.dylan-caponi.workers.dev/verify

Re-verify any exhibit402 proof-of-publication certificate for $0.02. Pass id = ERC-721 token id, Arweave tx id, or job id. The service re-downloads the permanently stored screenshot and signed manifest, recomputes every SHA-256, and checks them against the manifest and the on-chain record (immutable screenshotSha256, tokenURI, owner). Returns a machine-readable verdict with per-check detail, so an agent can confirm a certificate is genuine without trusting the issuer.

Endpointhttps://exhibit402.dylan-caponi.workers.dev/verify
Trust✓ Verified callable · 100% uptime over 1 checks · ~804 ms
PricingPay per call with x402, no account. Call it to get an exact quote before paying.
networkeip155:8453
schemeexact
pay to0x16B636328745E4e6086071B8Ff9f0C1C7DF9eB21
methodGET
last updated2026-11-11T16:03:55.342Z

Use it

Call it (an x402 client pays automatically)

curl -i https://exhibit402.dylan-caponi.workers.dev/verify
# 402 reply -> sign PAYMENT-REQUIRED with an x402 client (e.g. @x402/fetch) -> retry with PAYMENT-SIGNATURE

This listing as JSON

curl https://aipaygen.com/v1/catalog/api/x402-a311b29c01b05179

Search the whole marketplace from your agent (MCP)

{
  "mcpServers": {
    "aipaygen": {
      "url": "https://aipaygen.com/mcp"
    }
  }
}