{"name":"polymarket-filter","description":"Filters and searches active Polymarket prediction markets by category, keyword query, tag, liquidity threshold, and sort order. Send category, query, tag, active/closed flags, min_liquidity, limit, and order (by 24h volume, liquidity, or dates); the endpoint pulls a page from Polymarket's public gamma-api and applies the query, category, and liquidity filters server-side, returning markets with question, outcomes, outcome_prices, volume, and liquidity for each. This is market-data filtering only. It does not filter wallets by trade history and does not place trades. Use it as a Polymarket filter API, prediction market search tool, or market-data screener for forecasting research, sentiment monitoring, and arbitrage scanning.","price":"$0.005","method":"POST","input_schema":{"properties":{"query":{"type":"string","description":"Free-text filter applied to question, description, and slug."},"category":{"type":"string","description":"Filter by Polymarket category substring, e.g. 'Sports', 'Crypto', 'Politics'."},"tag":{"type":"string","description":"Polymarket tag slug filter, passed through to upstream."},"active":{"type":"boolean","description":"Default true. Pass false to include inactive markets."},"closed":{"type":"boolean","description":"Default false. Pass true to include closed markets."},"limit":{"type":"number","description":"1-100. Default 20."},"offset":{"type":"number","description":"Pagination offset."},"order":{"type":"string","enum":["volume24hr","liquidity","endDate","startDate"],"description":"Sort field: 'volume24hr', 'liquidity', 'endDate', or 'startDate'. Omit for default gamma-api order."},"ascending":{"type":"boolean","description":"Sort direction when order is set. Default false (descending)."},"min_liquidity":{"type":"number","description":"Minimum liquidity in USD."}}},"input_example":{"category":"Sports","active":true,"limit":25},"output_example":{"markets":[{"question":"Will team X win?","outcome_prices":[0.51,0.49]}],"count":25},"x402_payment_required":true,"x402_facilitator":"https://api.cdp.coinbase.com/platform/v2/x402"}