{"uid":"cap_uytPu0qPjg_bpkhT5JfAj","slug":"rubric-protocol-hedera-supply-facts-4c7711a0","name":"Rubric Protocol Hedera Supply 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/supply","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_UF4pROXkqH_gzQ2zeEq5b","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 the current HBAR total/circulating supply with a post-quantum ML-DSA-65 attestation ID anchoring the snapshot to Hedera HCS","exampleAgentPrompt":"Fetch the current HBAR supply from Rubric Protocol and give me the attested snapshot with its ML-DSA-65 attestation ID so I can include it as tamper-evident proof in my audit log.","exampleUseCases":[{"title":"Auditable DeFi collateral check","prompt":"Pull the attested HBAR circulating supply right now from Rubric Protocol — I need the attestation ID so my smart contract audit can prove exactly what supply figure I was relying on when I made this collateral decision."},{"title":"Compliance report with provable data","prompt":"Get me the current HBAR total supply with its post-quantum attestation ID from Rubric Protocol so I can attach it to my regulatory compliance report as tamper-evident evidence."},{"title":"Agent decision audit trail","prompt":"Before my agent executes this HBAR-denominated transaction, grab the current supply snapshot from Rubric Protocol with its Hedera HCS-anchored attestation ID so we have an unforgeable record of what the supply was at decision time."}],"resultDescription":"A JSON snapshot containing the current HBAR total supply and/or circulating supply figures, a timestamp for when the snapshot was taken, and an ML-DSA-65 post-quantum attestation ID referencing the Hedera Consensus Service (HCS) sequence number that anchors the data tamper-evidently on-chain. This allows any downstream consumer to independently verify that the data has not been altered.","failureModes":["Payment not received or invalid x402 USDC payment header — returns 402 Payment Required","Hedera mirror node temporarily unavailable — may return stale snapshot or 503 error","Invalid request format — returns 400 with schema validation error","Rate limiting exceeded — returns 429","Network congestion causing delayed HCS anchoring — attestation ID may reference a slightly older sequence"],"whenToPreferThis":"Choose this endpoint when your agent or system needs cryptographically provable, tamper-evident HBAR supply data rather than simply a raw number from an unauthenticated source. It is ideal for compliance, audit trails, regulated DeFi applications, or any agent workflow where you must prove what data you acted on at a specific moment. Prefer it over generic blockchain explorers when post-quantum attestation and HCS anchoring are required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:46:57.867Z","isFirstParty":false}