{"uid":"cap_a23hpEz7sYFQB7yl4FUF6","slug":"blockrun-kalshi-open-interest-lookup-b7979b11","name":"BlockRun Kalshi Open Interest Lookup","description":"Pay for the outcome. One endpoint for every model, tool and data source an agent needs — each call priced before it runs, at the best value per dollar. 103 models and 100 data and tool APIs.","url":"https://blockrun.ai/api/v1/surf/prediction-market/kalshi/open-interest","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"ticker":{"type":"string","description":"Required query param"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.0085","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":"$0.0085/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0085","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0085","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_zI3_Ghz-92xaYGwTrNHTH","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.0085","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches open interest data for a specific Kalshi prediction market contract by ticker symbol.","exampleAgentPrompt":"What's the current open interest on the Kalshi market with ticker HIGHTEMP-2025-JAN?","exampleUseCases":[{"title":"Monitor prediction market liquidity","prompt":"Can you check the open interest on the Kalshi ticker FED-2025-MAR right now? I want to know how liquid that market is before I place a trade."},{"title":"Track event contract activity","prompt":"What's the open interest for the Kalshi contract with ticker BTCEND-2025-DEC? I'm trying to gauge how much participation there is in that market."},{"title":"Compare contract engagement levels","prompt":"Pull the open interest data for the Kalshi market ELEC-2025-NOV — I want to see how many contracts are currently outstanding on that event."}],"resultDescription":"Returns open interest figures for the specified Kalshi prediction market ticker, reflecting the total number of outstanding (unsettled) contracts currently held by market participants, indicating liquidity and engagement levels.","failureModes":["Invalid or unknown ticker symbol returns an error or empty result","Ticker for a closed or settled market may return zero or an error","Network or upstream Kalshi API unavailability causes a 502/503 response","Missing required ticker query parameter returns a 400 bad request"],"whenToPreferThis":"Use this endpoint when you need open interest specifically from Kalshi's prediction market platform via a pay-per-call USDC-settled API, without needing a direct Kalshi API key — ideal for AI agents that want financial-grade prediction market data billed atomically on-chain.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:46:16.223Z","isFirstParty":false}