Roundhouse AI

Rubric Protocol

Prove your AI followed the rules — without exposing your models or data. Rubric creates tamper-evident, independently verifiable audit trails for every AI decision.

OtherLiveeip155:8453Exactvia wellknown:rubric-protocol.com
https://rubric-protocol.com/v1/x402/tiered-attest-batch
AttestationBatchAudit
Settlements · 30d
513↑ 11%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$38.57
Verified settled volume
913 settlements proven x402 by their on-chain EIP-3009 marker.
$0.035
Listed price
As published in the catalog. Always read the live 402 before paying.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xaB6731A0BcDf511c2842C768a03448075aB654ca

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "Payment required: POST with PAYMENT-SIGNATURE header",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xaB6731A0BcDf511c2842C768a03448075aB654ca",
      "amount": "35000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 120
    }
  ],
  "resource": {
    "url": "https://rubric-protocol.com/v1/x402/tiered-attest-batch",
    "tags": [
      "attestation",
      "batch",
      "audit"
    ],
    "iconUrl": "https://rubric-protocol.com/favicon.ico",
    "mimeType": "application/json",
    "description": "Batch attestation for AI agent decision streams: up to 1000 leaves under one post-quantum ML-DSA-65 (FIPS 204) signed Merkle root, anchored to Hedera mainnet HCS. Per-leaf attestation IDs with free public verification. $0.035 per batch — tamper-evident audit trails at agentic-telemetry scale.",
    "serviceName": "Rubric Protocol"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "leaves": [
              {
                "data": {
                  "score": 0.91,
                  "decision": "approve"
                }
              }
            ],
            "agentId": "acme-underwriter-01"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "paid": true,
            "topic": "0.0.10416909",
            "batchId": "bat_01J9Z0X7QK",
            "settled": true,
            "success": true,
            "accepted": 2,
            "algorithm": "ML-DSA-65",
            "attestationIds": [
              "att_…",
              "att_…"
            ],
            "paymentReceipt": {
              "leaves": [
                {
                  "payment": "settled",
                  "dataHash": "sha3-256:…"
                }
              ]
            },
            "verifyUrlPattern": "https://rubric-protocol.com/v1/verify/{attestationId}"
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "type": "object"
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "format": {
                "type": "string"
              },
              "example": {}
            },
            "additionalProperties": false
          }
        }
      },
      "discoverable": true
    }
  },
  "x402Version": 2,
  "outputSchema": {
    "type": "object",
    "properties": {
      "paid": {
        "type": "boolean"
      },
      "batchId": {
        "type": "string"
      },
      "settled": {
        "type": "boolean"
      },
      "success": {
        "type": "boolean"
      },
      "accepted": {
        "type": "number"
      },
      "attestationIds": {
        "type": "array",
        "items": {
          "type": "string"
        }
      },
      "paymentReceipt": {
        "type": "object"
      },
      "verifyUrlPattern": {
        "type": "string"
      }
    }
  }
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.035USDC≈ $0.035 USD
on Base · exact scheme

Pay 0.035 USDC on Base to 0xaB67…654ca. The signed payment is good for 2 minutes.

Paid to
0xaB67…654ca
USD Coin contract
0x8335…02913
Payment window
2 minutes
As published
35000 smallest units
Buys
Batch attestation for agent decision streams: up to 1000 leaves under one ML-DSA-65 signed Merkle root, anchored to Hedera mainnet HCS. Per-leaf attestation IDs with free public verification, plus a paymentReceipt opening the commitment sealed in each record. ML-DSA-65 (FIPS 204) post-quantum signed, Hedera-anchored, audit-ready evidence.
Returns
application/json
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xaB6731A0BcDf511c2842C768a03448075aB654ca",
    "amount": "35000",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://rubric-protocol.com/v1/x402/tiered-attest-batch",
    "description": "Batch attestation for agent decision streams: up to 1000 leaves under one ML-DSA-65 signed Merkle root, anchored to Hedera mainnet HCS. Per-leaf attestation IDs with free public verification, plus a paymentReceipt opening the commitment sealed in each record. ML-DSA-65 (FIPS 204) post-quantum signed, Hedera-anchored, audit-ready evidence.",
    "maxAmountRequired": "35000",
    "maxTimeoutSeconds": 120
  }
]

Provenance

Seen in the source catalog
—
Last indexed by Roundhouse
2026-09-20 22:45Z
Last enriched (probe, favicon, geo)
2026-09-20 23:15Z
x402 version
—
Max timeout
120s
Liveness probe
HTTP 402
Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service Rubric Protocol and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Rubric%20Protocol'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://rubric-protocol.com/v1/x402/tiered-attest-batch, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.