{"uid":"cap_XeRRhNqjzVyqa4175RVoR","slug":"rubric-protocol-attested-hbar-exchange-rate-b09fe227","name":"Rubric Protocol Attested HBAR Exchange Rate","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/exchange-rate","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_-_2gwAtvvn9jrJmrLUMbt","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/USD exchange rate from the Hedera network with a tamper-evident ML-DSA-65 post-quantum attestation anchored to Hedera HCS.","exampleAgentPrompt":"Fetch the current HBAR/USD exchange rate from Rubric Protocol with its post-quantum attestation so I have a tamper-evident, HCS-anchored proof of the rate my agent acted on.","exampleUseCases":[{"title":"DeFi agent trade price audit trail","prompt":"Before my agent executes this HBAR swap, grab the attested HBAR exchange rate from Rubric so I have a post-quantum-signed, Hedera-anchored record of exactly what rate it saw when it decided to trade."},{"title":"Compliance snapshot for regulators","prompt":"Pull the current attested HBAR/USD rate from Rubric Protocol and save the ML-DSA-65 attestation ID — I need tamper-evident proof of the price for our compliance report."},{"title":"Autonomous agent decision provability","prompt":"My AI agent just made a financial decision based on the HBAR price — fetch the Rubric attested exchange rate right now so we can prove to auditors exactly what the rate was at decision time."}],"resultDescription":"Returns the current HBAR/USD exchange rate as observed on the Hedera network, accompanied by a ML-DSA-65 post-quantum attestation ID that cryptographically links the snapshot to a specific Hedera HCS sequence number, making the price data tamper-evident and independently verifiable.","failureModes":["Payment not received or underpaid — returns 402 Payment Required","Hedera network temporarily unavailable — snapshot may be stale or error returned","Invalid request format — returns 400 Bad Request","Rate limiting or quota exceeded — returns 429 Too Many Requests"],"whenToPreferThis":"Choose this endpoint when your agent must not only know the current HBAR exchange rate but also prove what it knew — e.g. for audit trails, regulatory compliance, dispute resolution, or any scenario where a signed, tamper-evident record of the price at decision time is required. Prefer over standard price feeds when post-quantum attestation and HCS anchoring are necessary.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:44:53.363Z","isFirstParty":false}