Signed proof-of-execution notary for AI agents: POST a payload, get hash + timestamp + signature receipt verifiable via /pubkey. Independent attestation for agent jobs and tool outputs. Pay-per-stamp x402 USDC on Base. Not custody, escrow, or delivery verification.
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | n/a | 0x7E05...Dc20 |