Rubric Protocol
Same live Chainlink spot price as attested-price, plus the raw AggregatorV3Interface round tuple, exact eth_call replay instructions, and the attestation inlined with a disclosed commitment opening (salt + plaintext, never the encryption key) so a third party can independently recompute the payload commitment without contacting Rubric. ML-DSA-65 (FIPS 204) signed, anchored to Hedera mainnet HCS. Operated by Rubric Protocol.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
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.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
Pay 0.25 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
- 250000 smallest units
- Buys
- Same live Chainlink spot price as attested-price, plus the raw AggregatorV3Interface round tuple, exact eth_call replay instructions, and the attestation inlined with a disclosed commitment opening (salt + plaintext, never the encryption key) so a third party can independently recompute the payload commitment without contacting Rubric. ML-DSA-65 (FIPS 204) signed, anchored to Hedera mainnet HCS. Operated by Rubric Protocol.
- Returns
- application/json
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xaB6731A0BcDf511c2842C768a03448075aB654ca",
"amount": "250000",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://rubric-protocol.com/v1/x402/attested-price/proof",
"description": "Same live Chainlink spot price as attested-price, plus the raw AggregatorV3Interface round tuple, exact eth_call replay instructions, and the attestation inlined with a disclosed commitment opening (salt + plaintext, never the encryption key) so a third party can independently recompute the payload commitment without contacting Rubric. ML-DSA-65 (FIPS 204) signed, anchored to Hedera mainnet HCS. Operated by Rubric Protocol.",
"maxAmountRequired": "250000",
"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 404
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.
Show the promptHide 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/attested-price/proof, 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.