the402 endpoint detail

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agent-vending-machine.avm-7301.workers.dev attest

https://agent-vending-machine.avm-7301.workers.dev/attest

payable

Third-party existence attestation: submit a sha256 hash (or a payload to hash) and receive an Ed25519-signed receipt binding the hash to an issuance timestamp. Verify any receipt for free at /verify; signing public key published at /.

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.05
Network
base
Pay to
0x51Acf9C355EE2b703891CF385D3E8c305aD13b09
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
278 ms
Payment options
1 usable of 1
Last checked
2026-08-10T09:18:01.584Z (1d ago)
Category
identity

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fagent-vending-machine.avm-7301.workers.dev%2Fattest"