{"uid":"cap_-VhUrt88jBJco5FkZP7sv","slug":"api-carbon-cashmere-de-132b9316","name":"Bitcoin Whale Transaction Feed (Carbon Cashmere)","description":"Bitcoin whale transaction feed (>10 BTC default) with fee-rate, RBF flag, ancestor-count enrichment. ⚠️ output_btc includes change-outputs — activity proxy, not net transfer.","url":"https://api.carbon-cashmere.de/v1/btc-derivatives/whale-stream","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"count":4015,"min_btc":10,"total_btc":81243.7,"since_hours":24,"transactions":[{"btc":87.5,"rbf":false,"txid":"5c13094485f0...","ancestor_count":1,"fee_rate_sat_vb":3.2}]}},"example":{"request":{"input":{"type":"http","method":"GET","queryParams":{}}},"response":{"_truncated":true,"_originalSize":23662}},"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_b1GOXhwMBvr8mkIt5CezA","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Streams large Bitcoin transactions (>10 BTC by default) enriched with fee-rate, RBF flag, and ancestor-count metadata for on-chain whale activity monitoring.","exampleAgentPrompt":"Pull the latest Bitcoin whale transaction feed and show me any transactions over 10 BTC, including the fee-rate, whether they have RBF enabled, and how many ancestor transactions they have.","exampleUseCases":null,"resultDescription":"A feed of large Bitcoin transactions (defaulting to >10 BTC threshold) enriched with fee-rate in sat/vB, an RBF (replace-by-fee) boolean flag, and ancestor-count per transaction. Note: output_btc includes change outputs and reflects activity volume, not net transfer amount.","failureModes":["No transactions returned if mempool is quiet or threshold is too high","Truncated response for very high-volume periods (response size limit)","Stale data if node is temporarily out of sync","HTTP 402 if payment header is missing or insufficient (x402 protocol)","Rate limiting or timeout under heavy load"],"whenToPreferThis":"Use this endpoint when you need real-time Bitcoin whale transaction intelligence from a self-hosted node with enriched metadata (fee-rate, RBF, ancestor-count) rather than a generic blockchain explorer API. Ideal for agents monitoring large on-chain movements, detecting mempool congestion signals, or flagging high-fee replacement transactions.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T18:47:39.494Z","isFirstParty":false}