{"uid":"cap_RvvMVmnHueEusk7iDxgGT","slug":"prediction-market-open-interest-time-series-by-exchange-89866717","name":"Prediction Market Open Interest Time-Series by Exchange","description":"Time-series of prediction-market open interest by exchange (USD).","url":"https://d2ngmd5yvdfkqu.cloudfront.net/open-interest","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":["from","to","interval"],"properties":{"to":{"type":"string","description":"UTC end timestamp in ISO-8601 format."},"from":{"type":"string","description":"UTC start timestamp in ISO-8601 format."},"interval":{"type":"string","description":"Bucket size in milliseconds."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_4ZXEruFvFc7VgEN5wHxe_","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a time-series of prediction-market open interest bucketed by exchange in USD over a specified time range.","exampleAgentPrompt":"Show me the prediction market open interest broken down by exchange from January 1, 2025 to January 31, 2025 with 3600000 millisecond (1-hour) buckets.","exampleUseCases":null,"resultDescription":"A time-series array of open interest values denominated in USD, bucketed by the specified interval and broken down per prediction-market exchange, covering the requested date range.","failureModes":["Missing required query params (from, to, interval) returns a 400 Bad Request","Invalid ISO-8601 timestamps return a parsing or validation error","Interval value of 0 or negative may cause a 400 or unexpected behavior","Date range too large may time out or return an empty dataset","Payment not provided or insufficient returns a 402 Payment Required"],"whenToPreferThis":"Use this endpoint when you need historical or recent open-interest data specifically for prediction markets, broken down by exchange, in a time-bucketed format. Prefer it over general crypto open-interest endpoints when the focus is on event/prediction markets (e.g. Kalshi, Polymarket) rather than traditional derivatives exchanges.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:30:25.741Z","isFirstParty":false}