Rubric Protocol
Signed monthly x402 spend statement for one agent: totals, per-payment lines, Merkle root. The statement is itself an ML-DSA-65 attestation anchored to Hedera mainnet HCS. Render, verify, and print the response free at https://rubric-protoc
Go to this service →Our latest check (2026-10-11)
- Answering
- Yes — valid x402 payment terms
- Time to answer
- 299 ms
- Price
- $0.500 per call
- Paying buyers, last 30 days
- 1 (directory's own records)
- Paid calls, last 30 days
- 4
- Category
- Payments and on-ramps
- Address
- https://rubric-protocol.com/v1/x402/statement
Accuracy: paid answers checked against an independent record
Not yet in our paid checks. A seller we have not checked has neither passed nor failed.
For agents
This page as JSON: /sellers/ca73e8e7f21e.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).