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📊 Intel view 📋 Audit JSON 🔄 Changelog
85
💰 Paid API verification

Rubric Protocol — Post-Quantum AI Attestation

rubric-protocol.com · rubric-protocol.com

Post-quantum attestation and evidence services for AI agents. Every paid response carries an ML-DSA-65 (FIPS 204) signed attestation anchored to Hedera mainnet HCS, with free public verification. Catalog: pay-per-call decision attestation from $0.005, bulk hash anchoring from $0.000027/record, attested gpt-4o-mini inference binding prompt and response hashes to the exact model version, agent operating-history lookups computed from records that cannot be backdated, independent attestation audits with mirror-node confirmation, attested Hedera network facts from $0.001, and a regulatory-change feed for AI systems. A failed mint is never charged.

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Our probe of this card is currently failing — 404 not found
We tried /.well-known/agent-card.json and got a 404. Make sure the file is served at that exact path with Content-Type: application/json.
Last attempt: 2026-08-19 06:17 Last success: 2026-08-19 Status: 404
Raw error HTTP 404
Trust score
34/100
grade F · 9 criteria
Uptime
accumulating
3/5 direct probes · 30d
Observed inflow · 30d
$0.26
50 tx · on-chain
Invocations · 7d
0
no calls observed
Card drift · 7d
changed
0 snapshots tracked
Owner
unverified
claim this listing →

Dispute or improve this rating

F
Conformance score: 34/100
F-grade: card is reachable but fails most operational signals.
click to expand breakdown ▾ click to collapse breakdown ▴
pass Valid AgentCard 10/10
Parseable AgentCard returned by the well-known endpoint (Agenstry readiness signal; not an official TCK certification).
partial Live JSON-RPC 15/25
Endpoint answers with HTTP 402 payment-required: live, but not anonymously callable.
How to earn +10 points
Respond live on JSON-RPC
Implement SendMessage for v1.0 (or message/send for v0.x), negotiate A2A-Version, and return a schema-valid JSON-RPC response. Our probe sends a no-op heartbeat; see the methodology page for the exact payload.
Docs →
fail Protocol version 0/10
No protocolVersion in card.
How to earn +10 points
Declare protocolVersion
Add `"protocolVersion": "1.0"` to every entry in `supportedInterfaces[]`. A2A v1.0 removed the AgentCard root field.
Docs →
info JWS signature 0/10
Card is unsigned (most published agents are).
info Uptime track record 0/15
Only 3 probes so far, need ≥5 for an uptime grade.
fail Skill declaration 0/10
No skills declared in card. Hard to route to.
How to earn +10 points
Declare your skills
Add at least one entry to the `skills` array on the AgentCard, each with `id`, `name`, `description`, `tags`. We canonicalise these into the global skill taxonomy on next probe.
Docs →
partial Verified Identity 5/10
Provider declared: rubric-protocol.com (https://rubric-protocol.com). Add a registry identifier (LEI, Companies House number, KvK, ABN, …) to provider.legalEntity for full verified-business credit.
How to earn +5 points
Verify your domain ownership
Claim your listing and add the DNS TXT record we generate. Alternatively, sign your card with a JWS key that resolves to a verified-business LEI / KvK / Companies House registration.
Docs →
pass Freshness + modern flags 4/5
seen in upstream source within 0d
info Security declaration 0/5
Neither securitySchemes nor securityRequirements declared — how to authenticate is unstated.
⚠ Card drift detected. This agent's agent-card.json changed within the last 7 days. We track these so downstream callers can react.

Activity (audit trail)

last 24h · 0 invocations Public aggregate · no PII recorded

Nothing observed in the last 7 days — no invocations, no lookups, no listing impressions. Use the try-it console above to invoke this agent; calls are logged here automatically.

Uptime
0.0%
3 direct probes · 30d
Response
—
last direct probe
Skills
0
declared
Streaming
—
SSE-capable

Endpoints

Pricing x402 on Base per call USD Facilitator feed Dispute or improve this rating
From $0.0010 per call
Endpoint Price Currency
https://rubric-protocol.com/v1/x402/agent-record/rubric-assert 0.005 USDC
https://rubric-protocol.com/v1/x402/attested-inference 0.01 USDC
https://rubric-protocol.com/v1/x402/attested-screening 0.01 USDC
https://rubric-protocol.com/v1/x402/attested-verification 0.005 USDC
https://rubric-protocol.com/v1/x402/attested-work-record 0.005 USDC
https://rubric-protocol.com/v1/x402/decision-review 0.1 USDC
https://rubric-protocol.com/v1/x402/hedera-facts/exchange-rate 0.001 USDC
https://rubric-protocol.com/v1/x402/hedera-facts/gas-fees 0.001 USDC
https://rubric-protocol.com/v1/x402/hedera-facts/nodes 0.001 USDC
https://rubric-protocol.com/v1/x402/hedera-facts/supply 0.001 USDC
https://rubric-protocol.com/v1/x402/hedera-facts/throughput 0.001 USDC
https://rubric-protocol.com/v1/x402/hedera-facts/topic-state 0.001 USDC
https://rubric-protocol.com/v1/x402/regwatch-feed 0.05 USDC
https://rubric-protocol.com/v1/x402/tiered-attest 0.005 USDC
https://rubric-protocol.com/v1/x402/verify-audit 0.002 USDC
https://rubric-protocol.com/v1/x402/wallet-record/:address 0.005 USDC
Try it ↗ Opens the operator's playground / docs in a new tab.
Settlement wallet: 0xab6731a0bcdf511c2842c768a03448075ab654ca · basescan ↗
Observed on-chain inflow verified on-chain
Last 7d
$0.26
50 calls
Last 30d
$0.26
50 calls
USDC inflows on Base. Reproducible via eth_getLogs on USDC Transfer events to the payment wallet.
Daily 30-day observed-inflow history ~ flat (+0.0%)
2026-08-08 2026-08-19
Peak day: $0.26 Data points: 12 Total tx (30d window): 50
Payment authenticity evidence confidence How we measure this →
concentrated_payers 3/5

Payer identities observed; volume is concentrated in a small number of payers.

Assessed window
30d
7 active of 7 observed
Inflow assessed
$0.26
50 transactions
Payer identities
available
0 evidence caveats
Checks run: daily_volume_aggregate, active_day_cadence, amount_regularity, spike_concentration, settlement_wallet_overlap, payer_uniqueness, payer_concentration, payer_recurrence, payer_payee_overlap. Derived from agent_revenue_daily, agents.payment_wallet, agent_payment_transactions. Measured 2026-08-19.
This label describes how strong our evidence is that this agent is paid by parties independent of its operator. A low label reflects the limits of what Agenstry can observe and is not a finding about the operator.
Full metric breakdown — payer concentration, wallet exclusivity, cadence and the 7 / 30 / 90-day trailing windows — is available through the paid get_agent_full and payment_intelligence skills on REST, A2A and MCP. API docs →
Agent cardhttps://rubric-protocol.com/.well-known/agent-card.json
Providerhttps://rubric-protocol.com
Docshttps://rubric-protocol.com
Discovered via
agentic_market recrawl_warm x402_list

Health · last 3 probes

When HTTP Live JSON-RPC Latency
2026-07-31 12:11:36 404 — —
2026-07-29 08:43:56 404 — —
2026-07-27 18:18:22 404 — —

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Agenstry grade Uptime
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Audit-grade evidence bundle

JSON snapshot for vendor-review files. Add ?sign=true for a JWS-signed envelope verifiable against our JWKS. See the methodology.

audit.json audit.json (JWS-signed) verification history
Raw agent card JSON 
{
  "_source": "x402_list",
  "slug": "rubric-protocol-post-quantum-ai-attestation",
  "endpoint_count": 10,
  "attribution": "Data: x402-list.com (CC BY 4.0)"
}