HARS-Zero Whale Watch – Polymarket Whale Activity Monitor

x402

HARS-Zero Whale Watch – Polymarket Whale Activity Monitor is a paid API for AI agents from hars.cryptotavern.xyz, paid per call via x402, $0.015/call, status unknown (last checked 2026-10-18).

Returns a list of Polymarket prediction markets where large-wallet ('whale') activity has been detected, enabling AI agents to surface high-signal trading intelligence.

Price / call$0.015

Seller volume →—

Success—

StatusUnknown

How this service works

Polymarket prediction-market intelligence for AI agents. Pay-per-call in USDC via x402 protocol. Multi-chain: Base + Solana.

Output

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.

Example use cases

Daily whale signal briefing

“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.”

Crypto trading edge from whale flows

“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.”

Automated whale alert for trading bot

“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.”

Technical details

Endpoint

GEThttps://hars.cryptotavern.xyz/paid/whale-watch?utm_source=zero.xyz

When to prefer

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.

Side effects

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

Input

Schema · Request body

Field	Type	Description
properties	string

Output

Schema · Response

{
  "type": "object",
  "example": {
    "count": 0,
    "markets": []
  }
}

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