{"uid":"cap_U-7_aD6Q2Ha7yaEaL3S8Z","slug":"rubric-protocol-attested-hedera-usdc-supply-fe0b01a1","name":"Rubric Protocol – Attested Hedera USDC Supply","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/usdc-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_xvNnrR5WROcTTml9IzUdP","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 USDC circulating supply on the Hedera network, with a post-quantum ML-DSA-65 attestation ID proving the exact snapshot served.","exampleAgentPrompt":"Pull the current attested USDC circulating supply on Hedera mainnet and give me the ML-DSA-65 attestation ID so I can log what the agent knew at the time of the decision.","exampleUseCases":[{"title":"Auditable DeFi decision logging","prompt":"Before my agent executes this Hedera DeFi rebalance, fetch the attested USDC supply on Hedera so I have a cryptographically provable record of the on-chain state it was working from."},{"title":"Compliance snapshot for regulator report","prompt":"I need to show regulators the exact USDC supply on Hedera at the moment our system made its risk assessment — can you pull that attested figure with its attestation ID so we can include it in the audit trail?"},{"title":"Real-time stablecoin supply monitoring","prompt":"Check the current USDC supply on Hedera right now and give me the post-quantum attestation ID so I can verify the data hasn't been tampered with before I display it on the dashboard."}],"resultDescription":"A JSON response containing the current USDC circulating supply on the Hedera network, along with an ML-DSA-65 post-quantum attestation ID that cryptographically binds the served value to a specific network snapshot, enabling tamper-evident auditing.","failureModes":["Payment not included or insufficient: 402 Payment Required","Hedera network data temporarily unavailable: 503 Service Unavailable","Malformed request: 400 Bad Request","Attestation signing service offline: 503 with error detail","Rate limiting on repeated requests: 429 Too Many Requests"],"whenToPreferThis":"Choose this endpoint when you need a cryptographically provable, post-quantum attested snapshot of USDC supply on Hedera — specifically when auditability, compliance, or tamper-evidence is required. Prefer over plain Hedera explorers or RPC calls when the agent must prove what data it acted upon at a specific moment.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:47:44.579Z","isFirstParty":false}