{"uid":"cap_yk9oyCqG5IeC2j0rujVeJ","slug":"blockrun-polymarket-market-open-interest-lookup-c7de62a5","name":"BlockRun Polymarket Market Open Interest Lookup","description":"BlockRun lets AI agents use money well: pay for results, not for seats or subscriptions, and put every cent on the model or tool that actually does the job.","url":"https://blockrun.ai/api/v1/pm/polymarket/markets/0x0000000000000000000000000000000000000000000000000000000000000000/open_interest?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"input":{"type":"object","properties":{"query":{"type":"object","required":[],"properties":{}}}},"output":{"type":"object","properties":{"example":{"type":"object","properties":{"data":{"type":"object"}}}}}}},"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_0NjgC_ycKxx7I6L68F4HB","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 the open interest for a specific Polymarket prediction market by its contract address","exampleAgentPrompt":"What is the open interest for the Polymarket market at contract address 0x1234...abcd?","exampleUseCases":[{"title":"Prediction market liquidity check","prompt":"Can you check the open interest for the Polymarket market at contract 0xabc123...? I want to know how much money is currently locked in that market."},{"title":"Monitor high-stakes prediction markets","prompt":"Pull up the open interest for the Polymarket contract at 0xdef456... — I'm trying to gauge how liquid this market is before I place a position."},{"title":"DeFi research on prediction market activity","prompt":"I'm researching prediction market activity — can you get me the open interest figure for the Polymarket market with contract address 0x789fed...?"}],"resultDescription":"Returns open interest data for the specified Polymarket prediction market, indicating the total value of outstanding positions in the market as an on-chain data object.","failureModes":["Invalid or zero-padded contract address returns empty or null data","Market address not found on Polymarket returns error or empty response","Network or RPC issues cause timeouts","Non-existent market addresses may return zero values without explicit errors"],"whenToPreferThis":"Use this endpoint when you need on-chain open interest data for a specific Polymarket prediction market and want the lookup routed through BlockRun's payment layer settled in USDC — ideal for AI agents that need micro-payment-enabled DeFi data access without managing their own RPC infrastructure or API keys.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-19T00:55:10.197Z","isFirstParty":false,"canonicalSlug":"blockrun-polymarket-market-open-interest-lookup-c7de62a5"}