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Rubric Protocol – Hedera HCS Activity Facts
x402
Rubric Protocol – Hedera HCS Activity Facts is a paid API for AI agents from rubric-protocol.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Returns ML-DSA-65-attested Hedera Consensus Service (HCS) topic activity and network state facts, providing tamper-evident proof of what an agent knew at decision time.
Price / call$0.001
Success—
StatusUnknown
How this service works
Attested Hedera network facts: HBAR exchange rate, gas fees, supply, node roster, throughput, topic state. Each response
Output
A JSON snapshot of Hedera Consensus Service topic activity and throughput metrics, accompanied by an ML-DSA-65 (post-quantum) attestation ID that cryptographically binds the agent to the specific snapshot served. The attestation ID can be stored as tamper-evident proof of the observed state at the time of the call.
Example use cases
Audit trail for autonomous agent decision
“My agent just executed a transaction based on Hedera HCS topic state — pull the attested HCS activity snapshot from Rubric Protocol so I can attach the ML-DSA-65 attestation ID as tamper-evident proof of what the agent observed before acting.”
Compliance verification of HCS throughput
“I need a cryptographically signed record of current Hedera Consensus Service throughput and topic activity that I can submit to our compliance team as evidence — get me the latest attested HCS facts from Rubric Protocol.”
Cross-checking HCS state before publishing
“Before I publish results derived from Hedera HCS data, grab me an attested HCS activity snapshot from Rubric Protocol so I can cite the attestation ID and prove the source data hasn't been tampered with.”
Technical details
Endpoint
GEThttps://rubric-protocol.com/v1/x402/hedera-facts/hcs-activityWhen to prefer
Choose this endpoint when you need cryptographically attested, post-quantum-signed HCS topic activity data from the Hedera network and require provable, tamper-evident records of what your agent observed — especially for compliance, audit, or accountability workflows where you must prove the information state at decision time. Prefer this over generic Hedera explorers or non-attested data sources when the verifiability of the data matters.
Side effects
- Payment not received or malformed x402 header — returns 402 Payment Required
- Hedera network connectivity issue — snapshot may be stale or unavailable, returns 503
- Invalid or missing required input fields — returns 400 Bad Request
- Rate limiting or quota exceeded — returns 429 Too Many Requests
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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