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Vextorium Polymarket Whale Holders
x402
Vextorium Polymarket Whale Holders is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-13).
Returns the largest holders (by wallet and share count) for each outcome of a Polymarket prediction market, identified by its slug, plus the aggregate sum of top holder positions.
Price / call$0.004
Success—
StatusUnknown
How this service works
Largest holders of each outcome of a Polymarket market (by slug): wallet and shares, with the sum of the top holders. See where the whales are betting.
Output
Returns a JSON object containing the market slug, source, the market question, and an array of outcomes. Each outcome includes its label, an array of the top holder objects (wallet address and share count), and the sum of shares held by those top holders.
Example use cases
Whale sentiment check before trading
“Before I put money into the Polymarket market 'will-fed-cut-rates-in-september', can you pull the top 5 largest holders for each outcome so I can see which side the whales are stacked on?”
Research report on market concentration
“I need to analyze holder concentration on the Polymarket market 'bitcoin-above-100k-end-of-2024' — fetch the top 20 wallets and their share counts for each outcome and tell me the total shares the top holders control.”
Monitor whale positioning on a live market
“Check who the biggest holders are across all outcomes of the Polymarket slug 'who-will-win-2024-us-election' right now — I want the wallet addresses and share counts for the top 15 holders per outcome.”
Technical details
Endpoint
POSThttps://api.vextorium.com/polymarket-holders-pago?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need on-chain holder data for Polymarket prediction markets — specifically to identify whale wallets and their concentration per outcome. Prefer this over generic market APIs when you need per-wallet share breakdowns rather than just price or volume data, or when analyzing smart money positioning and market manipulation risk on Polymarket.
Side effects
- Invalid or non-existent slug returns null or empty results
- Limit value outside 1-20 range may cause validation error
- Polymarket data unavailability may result in empty resultados array
- Network timeout if on-chain data is slow to fetch
- Malformed request body returns an error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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