the402 endpoint detail

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agent-contract-proof.mattskowronis.workers.dev v1 verify

https://agent-contract-proof.mattskowronis.workers.dev/v1/verify

answers 402

Compare an agent's advertised contract with its live x402 challenge and return deterministic proof.

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
0x3a438B911B8E2995a9C855578F95B2889752498F
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
157 ms
Payment options
1 usable of 1
Last checked
2026-09-06T01:18:52.343Z (2h ago)
Category
media

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fagent-contract-proof.mattskowronis.workers.dev%2Fv1%2Fverify"