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Rubric Protocol Tiered AI Decision Attestation
x402
Rubric Protocol Tiered AI Decision Attestation is a paid API for AI agents from rubric-protocol.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).
Creates a post-quantum-signed (ML-DSA-65) attestation of an AI decision anchored to the Hedera mainnet HCS topic ledger
Price / call$0.005
Success—
StatusUnknown
How this service works
One post-quantum-signed AI decision attestation, anchored to Hedera mainnet HCS.
Output
Returns an attestationId, the Hedera HCS topic ID the record was anchored to, a public verifyUrl for free third-party verification, the ML-DSA-65 algorithm used, and boolean flags confirming payment was received (paid), the HCS transaction settled (settled), and the overall operation succeeded (success).
Example use cases
Loan approval decision audit trail
“Sign this loan approval decision with a post-quantum signature anchored to Hedera so we can prove to regulators exactly when and how the model recommended this applicant.”
Healthcare AI recommendation verification
“I need an immutable blockchain record proving our diagnostic AI recommended this treatment plan—can you create a quantum-resistant attestation I can show the patient and their physician?”
Insurance claim denial proof
“Create a tamper-proof attestation for this claim denial decision our underwriting AI made, then give me a shareable verification link in case the claimant disputes it.”
Technical details
Endpoint
POSThttps://rubric-protocol.com/v1/x402/tiered-attestWhen to prefer
Choose this endpoint when you need a quantum-resistant, blockchain-anchored proof of an AI decision — specifically when auditability, regulatory compliance, or tamper-evidence is required and you want the Hedera Consensus Service as the public ledger. Prefer this over generic signing services when ML-DSA-65 (NIST post-quantum standard) signatures and a free public verifyUrl for third-party auditors are necessary.
Side effects
- Payment not received or insufficient — paid returns false and attestation is not created
- HCS transaction fails to settle — settled returns false, attestationId may still be returned but anchoring is unconfirmed
- Invalid or malformed AI decision payload — 400 error before signing occurs
- Hedera mainnet congestion causing delayed settlement confirmation
- x402 payment protocol handshake failure — request rejected before processing begins
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| data | object | Arbitrary JSON content to be attested. Hashed and ML-DSA-65 signed; payment metadata is embedded in the attestation payload. |
| agentId | string | Identifier of the calling agent (optional; defaults to x402-agent) |
Output
Schema · Response
{
"paid": "boolean",
"topic": "string",
"settled": "boolean",
"success": "boolean",
"algorithm": "ML-DSA-65",
"verifyUrl": "string — free public verification",
"attestationId": "string"
}Tags
x402
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