{"uid":"cap_oAxkg5E3QXwAqeRjEQr1o","slug":"basebuilder-trading-mempool-whale-transaction-monitor-7a7df39d","name":"BaseBuilder Trading Mempool Whale Transaction Monitor","description":"BaseBuilder Trading API hub - 20 paid endpoints","url":"https://bb-trading-gold.vercel.app/api/mempool/whale-tx","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.195024","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":"$0.195024/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.195024","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.195024","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_KRY8ssNcEzn__BUvXG3uL","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.195024","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Detects and returns large whale transactions currently in the mempool before they are confirmed on-chain","exampleAgentPrompt":"Show me any whale transactions currently sitting in the mempool on Base — I'm looking for pending transfers over 100,000 USDC or equivalent so I can get ahead of big market moves.","exampleUseCases":null,"resultDescription":"Returns a list of large pending transactions in the mempool, including transaction hashes, sender and receiver wallet addresses, token amounts, gas prices, and current mempool status for each whale-level transfer detected.","failureModes":["Mempool may be empty or have no transactions exceeding the whale threshold at time of query","Network congestion could cause stale or incomplete mempool snapshots","Invalid or unsupported token address returns empty result or error","Request timeout if mempool is under heavy load","Authentication or payment failure (HTTP 402) if USDC balance is insufficient"],"whenToPreferThis":"Choose this endpoint when you need real-time visibility into large unconfirmed transactions on Base before they are included in a block — ideal for front-running detection, MEV analysis, whale sentiment gauging, or alerting workflows in DeFi trading bots.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:46:28.904Z","isFirstParty":false}