the402 endpoint detail

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verify.clearsigned.com verify t1

https://verify.clearsigned.com/verify/t1

answers 402

Clearsigned — the trust layer with no stake in the outcome. Submit {claim, evidence[]}, receive an Ed25519-SIGNED, evidence-bearing receipt (verify offline against GET /pubkey; every receipt is chained in the public ledger at GET /ledger/verify). Flat price, verdict-independent; refunds only for failure to deliver. Current mode is honestly labeled in each receipt.

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.01
Network
base
Pay to
0x7904e8De283960F4176c44690f34aF7Da47Dc75C
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
201 ms
Payment options
1 usable of 1
Last checked
2026-08-15T14:27:15.928Z (1d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fverify.clearsigned.com%2Fverify%2Ft1"