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Nansen Polymarket Event Screener
blockchainsmart-moneywallettokensdefianalytics
Nansen Polymarket Event Screener is a paid API for AI agents from Nansen at api.nansen.ai, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-12).
Browse, filter, and sort Polymarket prediction market events with aggregated volume, liquidity, and trader statistics across all child markets.
Price / call$0.01
Success—
StatusUnknown
How this service works
Browse and filter Polymarket events (groups of related markets). Includes aggregated volume, liquidity, and trader counts across all markets in each event. **What it helps to answer:** 1. **What are the most popular prediction market events?** 2. **How much total volume does an event have across all its markets?** 3. **Which events have the most active trading?**
Output
A paginated list of Polymarket events, each with: event ID, title, tags, market count, total volume (USD), 24h volume, weekly/monthly volume, liquidity, open interest, unique trader counts, max age in hours, neg-risk flag, top market ID, and nested data for individual child markets including their questions, best bid/ask prices, last trade price, open interest, 24h volume, and 1-day price change.
Example use cases
Example prompt
“Show me the top 10 most actively traded Polymarket events right now — filter to only active status, sort by 24-hour volume descending, and include crypto-tagged events. Give me the event titles, total volumes, and market counts.”
Technical details
Endpoint
POSThttps://api.nansen.ai/api/v1/prediction-market/event-screener?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to discover and rank Polymarket prediction market events — especially when you want cross-market aggregates (total event volume, total liquidity, combined trader counts) rather than individual market data. Prefer this over single-market endpoints when comparing events, identifying trending topics, or building leaderboards of prediction market activity. Ideal for broad discovery with filtering by tag, status, or volume thresholds.
Side effects
- Invalid sort_by field value returns validation error
- Tags array exceeding 50 items returns 422 unprocessable entity
- Query string exceeding 200 characters is rejected
- Invalid status enum value returns validation error
- min_liquidity greater than max_liquidity returns empty or error
- Page number below 1 or per_page above 1000 returns validation error
- Unauthorized request (missing/invalid API key) returns 401
- No matching events for given filters returns empty data array
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| tags | array | Filter by tags |
| query | string | Search query to filter results |
| status | string | Valid status filters for screener endpoints. |
| sort_by | string | Valid sort fields for screener endpoints. |
| neg_risk | — | Filter by neg-risk framework (null = no filter) |
| order_by | — | Sort order |
| pagination | object | Pagination parameters for API requests. |
| max_liquidity | number | Maximum liquidity filter (-1 = no limit) |
| min_liquidity | number | Minimum liquidity filter (-1 = no filter) |
| end_date_after | string | Filter markets ending after this datetime (ISO 8601) |
| end_date_before | string | Filter markets ending before this datetime (ISO 8601) |
| min_volume_24hr | number | Minimum 24h volume filter (-1 = no filter) |
| max_open_interest | number | Maximum open interest filter (-1 = no limit) |
| min_open_interest | number | Minimum open interest filter (-1 = no filter) |
| max_unique_traders_24h | integer | Maximum unique traders in 24h (-1 = no limit) |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| datarequired | array | List of event screener records |
| pagination | object | Pagination information for API responses. |
Tags
blockchainsmart-moneywallettokensdefianalyticsprofilerdexpnlonchainprediction-marketdata
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