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Nansen Polymarket Top Holders
blockchainsmart-moneywallettokensdefianalytics
Nansen Polymarket Top Holders is a paid API for AI agents from Nansen at api.nansen.ai, paid per call via MPP or x402, $0.05/call, status unknown (last checked 2026-10-12).
Returns the largest position holders for a Polymarket prediction market, including position sizes, average entry prices, and unrealized PnL, computed from on-chain ERC-1155 token transfers on Polygon.
Price / call$0.05
Success—
StatusUnknown
How this service works
Get the largest position holders for a Polymarket prediction market. Positions are computed from on-chain ERC-1155 token transfers on Polygon, with SAFE proxy wallet resolution to identify actual users. **What it helps to answer:** 1. **Who are the biggest holders in this prediction market?** 2. **What are the position sizes and entry prices of top holders?** 3. **What is the unrealized PnL of major positions?** 4. **Are whales positioned Yes or No?**
Output
A paginated list of top holders for the specified Polymarket market, each record including the holder's wallet address, resolved SAFE proxy owner address, which side (Yes/No) they hold, their token position size, average entry price, current market price, unrealized PnL in USD, and outcome index. Pagination metadata indicates current page and whether it's the last page.
Example use cases
Identify smart money positioning before market moves
“Pull the top 10 holders for that Trump election market and show me which side the biggest whales are betting on right now — I need their entry prices and current PnL to see if smart money is already locked in or still accumulating.”
Track largest position holders by profitability
“Find me the top holders in the Fed rate decision market sorted by unrealized PnL — I want to see who's winning big and what their average entry prices were, so I can understand where the smart money thesis is.”
Monitor whale accumulation patterns in emerging markets
“Show me the biggest 15 position holders for that new climate policy market, including their token amounts and entry prices — I'm trying to figure out if whales are quietly building positions before the market gains attention.”
Technical details
Endpoint
POSThttps://api.nansen.ai/api/v1/prediction-market/top-holders?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to identify the largest position holders in a specific Polymarket prediction market and want on-chain verified data with SAFE wallet resolution. Prefer this over generic blockchain explorers when you need aggregated position-level analytics (entry price, unrealized PnL, side) rather than raw transfers. Best when you want to track smart money positioning on Polymarket specifically.
Side effects
- Invalid or non-existent market_id returns empty data array
- Missing required market_id field returns a validation error
- Invalid sort field or direction enum values return a 422 validation error
- Requesting a page beyond the last page returns an empty data array
- Authentication failure (invalid API key) returns 401 or 403 error
- Rate limiting may return 429 Too Many Requests
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| sort | — | Deprecated: use 'order_by' instead. |
| order_by | — | Sort order |
| market_idrequired | string | Polymarket market ID |
| pagination | object | Pagination parameters for API requests. |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| datarequired | array | List of top holder records |
| pagination | object | Pagination information for API responses. |
Tags
blockchainsmart-moneywallettokensdefianalyticsprofilerdexpnlonchainprediction-marketdata
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