{"uid":"cap_DNdT3_ERLc98AhTHPmMq8","slug":"httpay-xyz-ebc02cbd","name":"httpay.xyz Whale Alert Monitor","description":"Real-time large transfer monitoring on Base — track whale movements for USDC, WETH, and cbBTC over the last N blocks. Params: ?minUsd=10000&token=USDC&limit=20","url":"https://httpay.xyz/api/whale-alerts","method":"POST","headers":{},"bodySchema":null,"responseSchema":{"type":"json","example":{"description":"Real-time large transfer monitoring on Base — track whale movements for USDC, WETH, and cbBTC over the last N blocks. Params: ?minUsd=10000&token=USDC&limit=20"}},"example":{"request":{"limit":20,"blocks":50,"minUsd":10000,"tokens":["USDC","WETH","cbBTC"]},"response":{"meta":{"x402":true,"poweredBy":"Alfred Zhang 🫡"},"chain":"Base","alerts":[],"params":{"limit":20,"token":"ALL","minUsd":10000},"prices":{"USDC":"$0.999716","WETH":"$1,670.59","CBBTC":"$63,448"},"byToken":{},"topAlert":null,"fromBlock":null,"updatedAt":"2026-06-12T03:58:30.091Z","dataSource":"BaseScan live token transfer events","scanWindow":"~4h (7200 blocks)","whaleCount":0,"currentBlock":null,"totalTransfers":0,"totalVolumeUsd":"$0"}},"exampleRequest":{"limit":20,"blocks":50,"minUsd":10000,"tokens":["USDC","WETH","cbBTC"]},"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/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_vPNKqnLN0a3lFmTi12pxz","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Monitors real-time large transfers on Base blockchain for USDC, WETH, and cbBTC, returning whale movements above a specified USD threshold over the last N blocks","exampleAgentPrompt":"Show me the top 20 whale transfers on Base from the last 50 blocks where at least $10,000 in USDC moved — I want to see who's pushing big money around right now.","exampleUseCases":null,"resultDescription":"A list of large transfer events on Base matching the specified token and minimum USD threshold, including transaction hashes, sender/recipient addresses, transfer amounts in USD, token type, and block numbers.","failureModes":["Invalid token symbol returns an error or empty result","minUsd value too high returns empty list with no matches","Limit exceeding API maximum returns truncated or error response","Base RPC unavailability causes timeout or 503","Payment of 0.01 USDC not received returns 402 Payment Required"],"whenToPreferThis":"Use this endpoint when you need real-time on-chain whale activity specifically on the Base network for USDC, WETH, or cbBTC, and want to filter by minimum USD transfer size over recent blocks. Prefer this over general block explorers when you need structured, pre-filtered large-transfer data without parsing raw transactions.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:56:40.138Z","isFirstParty":false}