{"uid":"cap_kJfDK4CQHndOQCA-3GHow","slug":"rubric-protocol-hedera-hcs-activity-facts-eff93395","name":"Rubric Protocol – Hedera HCS Activity Facts","description":"Attested Hedera network facts: HBAR exchange rate, gas fees, supply, node roster, throughput, topic state. Each response","url":"https://rubric-protocol.com/v1/x402/hedera-facts/hcs-activity","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"pathParams":{"type":"object","required":["fact"],"properties":{"fact":{"type":"string"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"format":{"type":"string"},"example":{}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_LZCGj8SxILlFXQlU0dLa3","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"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.","exampleAgentPrompt":"Fetch me the latest attested HCS activity snapshot from Rubric Protocol so I have a post-quantum-signed record of Hedera Consensus Service topic throughput and state I can include as proof in my audit trail.","exampleUseCases":[{"title":"Audit trail for autonomous agent decision","prompt":"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."},{"title":"Compliance verification of HCS throughput","prompt":"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."},{"title":"Cross-checking HCS state before publishing","prompt":"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."}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:49:01.848Z","isFirstParty":false}