the402 endpoint detail

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exhibit402.dylan-caponi.workers.dev verify

https://exhibit402.dylan-caponi.workers.dev/verify

answers 402

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

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.02
Network
base
Pay to
0x16B636328745E4e6086071B8Ff9f0C1C7DF9eB21
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
GET
Response latency
9 ms
Payment options
1 usable of 1
Last checked
2026-09-06T01:18:40.041Z (33d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fexhibit402.dylan-caponi.workers.dev%2Fverify"