{"uid":"cap_EQ8EzaCE9puhYHwI7pLzF","slug":"bitcoin-fee-exceeds-subsidy-anomaly-detector-dbe45cb6","name":"Bitcoin Fee Exceeds Subsidy Anomaly Detector","description":"Bitcoin fees exceed subsidy anomaly check on chain tip. Validation-gated detector fee_exceeds_subsidy for forensic and monitoring agents. Cryptographically signed (Ed25519) — every response is independently verifiable via /.well-known/obol-pubkey.","url":"https://obol-x402.fly.dev/v1/btc/anomaly/fee-exceeds-subsidy/latest","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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"down","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_4UB_FIF-qp61telXpy8Rj","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks whether Bitcoin transaction fees on the current chain tip exceed the block subsidy, flagging this rare anomaly with a cryptographically signed Ed25519 response.","exampleAgentPrompt":"Check the latest Bitcoin block and tell me if total transaction fees exceeded the block subsidy — flag it as an anomaly if so, and give me the signed result.","exampleUseCases":null,"resultDescription":"Returns a signed (Ed25519) JSON response indicating whether fees on the current Bitcoin chain tip exceed the block subsidy, including the anomaly flag (fee_exceeds_subsidy), relevant block metadata, and a cryptographic signature verifiable via the public key at /.well-known/obol-pubkey.","failureModes":["Bitcoin node data unavailable — upstream connection to chain tip may be down","Payment not processed — x402 payment of $0.01 USDC required before data is returned","Invalid or expired chain tip data — block data may be momentarily stale during reorg","Signature verification failure — Ed25519 signature mismatch indicating tampered response"],"whenToPreferThis":"Use this endpoint when you need a lightweight, pay-per-call, cryptographically verifiable check on whether Bitcoin transaction fees have exceeded the block subsidy on the current chain tip — ideal for forensic agents, monitoring pipelines, and anomaly alert systems that require tamper-evident responses. Prefer this over general block explorers when you need structured anomaly detection with Ed25519-signed output rather than raw block data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T14:25:12.100Z","isFirstParty":false}