Nansen Polymarket Market Screener

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Nansen Polymarket Market 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 2026-10-11).

Browse, filter, and sort Polymarket prediction markets by volume, liquidity, price, status, and more

Price / call$0.01

Seller volume →—

Success—

StatusUnknown

How this service works

Browse and filter all Polymarket prediction markets. Supports sorting by volume, liquidity, price change, and more. Filter by search query and active/closed status. **What it helps to answer:** 1. **What are the most active prediction markets right now?** 2. **Which markets have the highest volume or liquidity?** 3. **What new markets have been created recently?**

Output

A paginated list of prediction market items, each including market ID, question text, event title, slug, active/closed status, volume (24hr/1wk/1mo/total), liquidity, open interest, unique traders, best bid/ask prices, neg-risk flag, market age in hours, creation date, end date, and associated tags.

Example use cases

Example prompt

“Show me the top 20 most actively traded Polymarket prediction markets right now — filter to only active ones and sort by 24-hour volume descending, tagging anything related to crypto or Bitcoin.”

Technical details

Endpoint

POSThttps://api.nansen.ai/api/v1/prediction-market/market-screener?utm_source=zero.xyz

When to prefer

Use this endpoint when you need to discover, browse, or rank Polymarket prediction markets across any topic — especially when sorting or filtering by trading activity metrics like 24hr volume, liquidity, or open interest. Prefer this over the Event Screener when you need market-level granularity rather than event-level aggregates.

Side effects

Invalid sort_by or order_by field enum value returns 422 validation error
min_price or max_price below -1 returns validation error
Pagination page below 1 or per_page above 1000 returns validation error
Empty results array when no markets match the filter criteria
Query string exceeding 200 characters returns validation error
Tags array exceeding 50 items returns validation error
Payment failure or insufficient USDC balance returns 402 error

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
max_price	number	Maximum price filter (-1 = no limit)
min_price	number	Minimum price filter (-1 = no filter)
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 market screener records
pagination	object	Pagination information for API responses.

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