{"uid":"cap_xP5iIArUHooq2iFOI8P3n","slug":"silverback-x402-onrender-com-be767b34","name":"Silverback Whale Movement Monitor","description":"Monitor whale movements including buys, sells, and transfers for any token","url":"https://silverback-x402.onrender.com/api/v1/whale-moves","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"limit":{"type":"number","description":"Number of results (default: 10, max: 50)"},"token":{"type":"string","description":"Token contract address (optional - ETH if not provided)"},"chainId":{"type":"number","description":"Chain ID (default: 8453 for Base)"},"minValueUsd":{"type":"number","description":"Minimum USD value to track (default: 100000)"}}},"responseSchema":null,"example":{"request":{"limit":10,"token":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","chainId":8453,"minValueUsd":500000},"response":{"data":{"moves":[],"token":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","chainId":8453,"summary":{"netFlow":0,"topBuyers":[],"topSellers":[],"totalMoves":0,"largestMove":null}},"success":true}},"exampleRequest":{"limit":10,"token":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","chainId":8453,"minValueUsd":500000},"tags":["x402"],"displayCostAmount":"0.02","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":"down","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_2WwN499VgBfbcavM-vNGF","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Tracks large on-chain token transfers, buys, and sells above a USD threshold, returning a ranked list of whale moves with summary analytics","exampleAgentPrompt":"Show me the top 10 whale moves for USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base chain with a minimum transaction size of $500,000 — I want to see who's buying, selling, and moving big amounts.","exampleUseCases":null,"resultDescription":"Returns a list of up to 50 whale transactions including sender, receiver, move type (buy/sell/transfer), token symbol, raw value, USD value, transaction hash, block number, and timestamp. Also includes a summary with total move count, net flow, top buyers, top sellers, and the single largest move.","failureModes":["Invalid token contract address returns error or empty moves array","Unsupported chain ID may return no results","minValueUsd set too high may return zero moves","limit exceeding 50 is clamped or rejected","Payment failure via x402 returns 402 before data is served","Rate limiting or cold start on Render free tier causes timeout"],"whenToPreferThis":"Use this endpoint when you need real-time whale activity intelligence for a specific ERC-20 token on Base (or other EVM chains), particularly when you want to identify large holders moving funds, detect buy/sell pressure from big wallets, or understand net flow dynamics. Prefer this over generic block explorers when you need structured, filterable, USD-denominated whale data with summary analytics in a single call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T08:26:23.212Z","isFirstParty":false}