{"uid":"cap_WBI91u5ZX-QG9y3v8NOKQ","slug":"bitcoin-whale-alert-transfers-30d35d71","name":"Bitcoin Whale Alert Transfers","description":"Bitcoin large transactions in the latest block from mempool.space: total output in BTC, fee, txid and block height, filtered by minBtc. Bitcoin only (no ETH or SOL). Covers the first 25 transactions of the tip block; output total includes change, so it is transaction size, not one wallet's transfer.","url":"https://api.chainmarket-api.workers.dev/api/crypto/whale-alert-transfers?utm_source=zero.xyz","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"},"queryParams":{"type":"object","required":[],"properties":{"limit":{"type":"string","description":"How many transactions to return, 1 to 25 (default 10)"},"minBtc":{"type":"string","description":"Minimum total output in BTC, 0.01 to 10000 (default 1)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"count":3,"source":"https://mempool.space/api/block/000000000000000000015d1494dfcf12bfc97f6ff50eec3c622091e707183436/txs","blockHash":"000000000000000000015d1494dfcf12bfc97f6ff50eec3c622091e707183436","checkedAt":"2026-10-23T09:35:53.973Z","transfers":[{"txid":"ab4f2d8e06db1c799dabdc5716288e8e128cec6af79f3122fe415aa9732a79c5","feeSats":0,"blockTime":"2026-10-23T09:27:57.000Z","inputCount":1,"blockHeight":972749,"outputCount":6,"totalOutputBtc":3.13056286},{"txid":"ca2949e6d137d0dd135381185e22d8396a45fadbeb1e3836899fe7a832054d3c","feeSats":6195,"blockTime":"2026-10-23T09:27:57.000Z","inputCount":5,"blockHeight":972749,"outputCount":2,"totalOutputBtc":1.09203195}]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_v5zyFPrX4aXMxtEQuEuS2","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns large Bitcoin transactions from the latest block, filtered by minimum BTC output, sourced from mempool.space","exampleAgentPrompt":"Show me the top 5 Bitcoin transactions from the latest block that moved at least 2 BTC — I want to track whale activity on-chain.","exampleUseCases":[{"title":"Whale alert dashboard feed","prompt":"Pull the 25 biggest Bitcoin transfers from the latest block, only showing ones that moved at least 5 BTC, so I can populate my whale alert feed."},{"title":"Detect large BTC movement","prompt":"Check if any Bitcoin transactions over 50 BTC have occurred in the most recent block — I'm watching for whale movements that might signal a market shift."},{"title":"On-chain research snapshot","prompt":"Give me up to 10 recent Bitcoin transactions that transferred at least 1 BTC, including their txids, block height, and total output amounts, for my on-chain research report."}],"resultDescription":"Returns a JSON object with a count of matching transactions, the source block hash, the timestamp of the check, and an array of transaction records each containing txid, fee in satoshis, block time, input count, output count, block height, and total output in BTC.","failureModes":["Payment failure if insufficient USDC balance — call not charged on failure","Invalid limit value outside 1–25 range returns error","Invalid minBtc value outside 0.01–10000 range returns error","Upstream mempool.space unavailability may cause timeout or empty response","No transactions matching the minBtc threshold returns empty transfers array"],"whenToPreferThis":"Use this endpoint when you need real-time, pay-per-call access to large Bitcoin on-chain transactions without API keys or subscriptions. Ideal for agents monitoring whale activity, building alert systems, or doing lightweight on-chain research. Prefer this over exchange APIs when you need raw blockchain-level transfer data rather than trading volume or order book data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-24T12:38:56.109Z","isFirstParty":false,"canonicalSlug":"bitcoin-whale-alert-transfers-30d35d71"}