{"uid":"cap_9zifBm4mUwIfgAkU4KYt3","slug":"synapse-whale-tracking-14b9730a","name":"Synapse Whale Tracking","description":"Public data and utility APIs paid per call in USDC on Base (x402). No accounts, no API keys. 174 routes: crypto/equity data, onchain reads, DNS/email/security intel, geo/weather, x402 payment diagnostics, dev utilities and more.","url":"https://anibalb.duckdns.org/x402/whale-tracking?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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"token":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","whales":[{"buys":3,"sells":1,"wallet":"0x...","net_usd":50000}],"recent_large_transfers":[{"to":"0x...","from":"0x...","block":123456,"value_usd":12000}]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/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_geaCaA4qJccyHe28w0BLT","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns whale wallet activity for a token, including large buy/sell counts, net USD positions, and recent large on-chain transfers.","exampleAgentPrompt":"Can you pull the current whale activity for USDC on Base — show me which wallets are making the biggest net buys and sells, and list any recent large transfers?","exampleUseCases":[{"title":"Spot whale accumulation before a pump","prompt":"Check whale activity for the token at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 — I want to know which wallets are net buying the most in USD and if there have been any massive transfers recently."},{"title":"Monitor smart money exits during volatility","prompt":"I need to see if any whales are heavily selling a token I'm holding — pull the whale tracking data and show me the top sellers by net USD and any large outbound transfers."},{"title":"Research token before investing","prompt":"Before I buy into this project, can you look up the whale wallet behavior for that token and tell me if big holders are accumulating or distributing right now?"}],"resultDescription":"Returns a JSON object containing the tracked token address, an array of whale wallets each with buy count, sell count, net USD position, and wallet address, plus a list of recent large transfers with sender, receiver, block number, and USD value.","failureModes":["Token address not found or unsupported — empty or null whale array returned","Payment not included or insufficient — HTTP 402 response requiring USDC payment on Base","Network timeout if Base RPC is congested — slow or failed response","No whale activity detected for low-liquidity tokens — empty arrays returned","Invalid query parameters — 400 bad request"],"whenToPreferThis":"Choose this endpoint when you need rapid, pay-per-call on-chain whale intelligence without setting up an account or API key. Ideal for agents that need ad-hoc whale activity snapshots for specific tokens on Base, especially when integrating with x402 micropayment flows. Prefer over subscription analytics platforms when cost per call matters more than historical depth.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:42:05.101Z","isFirstParty":false,"canonicalSlug":"synapse-whale-tracking-14b9730a"}