{"uid":"cap_aOFACV_7Szi47IT58wxPu","slug":"polymarket-prediction-market-data-api-5b85a625","name":"Polymarket Prediction Market Data API","description":"Prediction market data (Polymarket): trending markets with question, outcome prices (implied probability), volume, end date. For forecasting agents, news analysis, sentiment tools.","url":"https://jp-data-api-production.up.railway.app/prediction/markets","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":[],"properties":{"q":{"type":"string","description":"keyword, or omit for trending"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_FdkM8GKRU2uDoltYifUt8","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches trending Polymarket prediction markets with question text, outcome prices (implied probabilities), trading volume, and end dates; supports keyword search or defaults to trending.","exampleAgentPrompt":"What are the trending Polymarket prediction markets right now, including their outcome prices and volumes? Also search for any markets related to the US election.","exampleUseCases":null,"resultDescription":"Returns a list of Polymarket prediction markets, each including the market question, outcome prices representing implied probabilities, trading volume, and expiry/end date. Without a query, returns currently trending markets; with a keyword query, returns matching markets.","failureModes":["No markets found for the given keyword — empty result set returned","Payment of 0.01 USDC not fulfilled — HTTP 402 response blocking access","Network timeout on Railway-hosted service — connection error","Invalid query parameter format — may return error or empty results","Polymarket data source unavailable — upstream data may be stale or missing"],"whenToPreferThis":"Use this endpoint when you need real-time Polymarket prediction market data including outcome prices and volume for forecasting, news analysis, or sentiment tools. Prefer this over a generic web scrape when you need structured probability and volume data directly from Polymarket markets. If you also need AI analysis of a specific market question, see the sibling AI analysis endpoint on the same host.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:42:17.748Z","isFirstParty":false}