{"uid":"cap_3aqzo7-zQDG3FUF9YG0VB","slug":"btcnode-uk-mempool-whale-alert-77161016","name":"btcnode.uk Mempool Whale Alert","description":"Mempool Whale Alert — large BTC transfers from mempool. Filter by min_btc, time window.","url":"https://btcnode.uk/api/agent/whales","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","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_8Yb-iRhYNwfRu4B384a3J","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns large BTC transfers currently in the mempool, filterable by minimum BTC amount and time window","exampleAgentPrompt":"Show me all Bitcoin whale transactions in the mempool right now — anything over 50 BTC in the last hour.","exampleUseCases":null,"resultDescription":"A list of large BTC transfers currently sitting in the Bitcoin mempool, each entry likely including transaction ID, BTC amount, sender/receiver addresses, and timestamp, filtered by the specified minimum BTC threshold and time window.","failureModes":["No whale transactions found matching the filter criteria — returns empty list","Invalid min_btc value — returns 400 error","Mempool node temporarily unavailable — returns 503 or timeout","Time window parameter out of acceptable range — returns validation error","Payment not processed — returns 402 Payment Required"],"whenToPreferThis":"Use this endpoint when you need real-time visibility into large, unconfirmed Bitcoin transfers (whale activity) directly from a live mempool. Prefer it over blockchain explorers when you want to catch whale movements before they are confirmed, or when filtering by size threshold is needed.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:56:33.104Z","isFirstParty":false}