{"uid":"cap_8lVyqHnr5C84onNPJ7EFU","slug":"hars-zero-whale-watch-polymarket-whale-activity-monitor-ff657940","name":"HARS-Zero Whale Watch – Polymarket Whale Activity Monitor","description":"Polymarket prediction-market intelligence for AI agents. Pay-per-call in USDC via x402 protocol. Multi-chain: Base + Solana.","url":"https://hars.cryptotavern.xyz/paid/whale-watch?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"object","example":{"count":0,"markets":[]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.015/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.015","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.015","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_IjTq5SvPuyLas0FKuj3Bu","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.015","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a list of Polymarket prediction markets where large-wallet ('whale') activity has been detected, enabling AI agents to surface high-signal trading intelligence.","exampleAgentPrompt":"Show me which Polymarket prediction markets are currently seeing heavy whale activity — I want to know where big wallets are placing their bets right now.","exampleUseCases":[{"title":"Daily whale signal briefing","prompt":"Give me a rundown of all Polymarket markets that whales are piling into today — I want to see where the smart money is moving before I make any predictions."},{"title":"Crypto trading edge from whale flows","prompt":"Pull up any Polymarket prediction markets where large wallets have been unusually active lately — I'm trying to get an edge on which outcomes the whales think are likely."},{"title":"Automated whale alert for trading bot","prompt":"Check right now whether there are any Polymarket markets with significant whale-level activity and tell me the count and which markets they are — I need this for my automated signal pipeline."}],"resultDescription":"Returns a JSON object containing a count of matching markets and an array of market objects where whale activity has been detected on Polymarket. Each market entry includes relevant metadata about the prediction market and the associated large-wallet signals.","failureModes":["Payment not completed via x402 protocol returns HTTP 402 with payment requirements","No whale activity detected returns count:0 with empty markets array","Invalid or missing properties filter parameter may return empty results or an error","Network latency or Polymarket data feed delays may result in stale or incomplete data","Insufficient USDC balance to cover $0.051 per-call fee blocks request"],"whenToPreferThis":"Choose this endpoint when you need real-time intelligence on which Polymarket prediction markets are attracting large-wallet ('whale') participation, and you want a pay-per-call model in USDC without a subscription. Prefer it over generic Polymarket APIs when the specific signal you want is large-holder activity rather than raw market listings or price data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T12:49:19.627Z","isFirstParty":false,"canonicalSlug":"hars-zero-whale-watch-polymarket-whale-activity-monitor-ff657940"}