https://groundcheck.seiche.info/attest-delivery
Signed delivery receipts for agentic commerce: submit what a paid service returned (plus its x402 settlement receipt and advertised schema) and receive an offline-verifiable Ed25519 attestation binding payment to delivery to grounded content — schema conformance, machine-verified claim verdicts, and a neutral accountability trail for disputes between agents and the services they pay.
#27
$0.05
1
1
Points earned against points available, biggest lever first.
| Rank | Service | Score | Volume | Price |
|---|---|---|---|---|
| #1 | Sirenic−26 | 58 | 825 txns | $0.02 |
| #2 | 53 | 146 txns | $2.00 |
| #3 | Screenshots−20 | 52 | 121 txns | $0.02 |
| #4 | 46 | 74 txns | $0.05 |
| #5 | 46 | 41 txns | $0.0020 |