{"uid":"cap_vfyCjhwwhXwVIFpcsxHEh","slug":"octodamus-polymarket-odds-3813ff04","name":"Octodamus Polymarket Odds","description":"Live crypto prediction-market facts from Polymarket: normalized YES/NO odds (implied probability), 24h volume, liquidity, CLOB order-book spread, and resolution status per market. Not a prediction.","url":"https://api.octodamus.com/v2/polymarket/odds","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"type":"object","required":["method"],"properties":{"method":{"type":"string","const":"GET"},"headers":{"type":"object","required":["PAYMENT-SIGNATURE"],"properties":{"PAYMENT-SIGNATURE":{"type":"string","description":"x402 EIP-3009 USDC payment signature (Base mainnet)"}}}}},"output":{"type":"object","properties":{"action":{"enum":["BUY","SELL","HOLD"],"type":"string"},"signal":{"enum":["BULLISH","BEARISH","NEUTRAL"],"type":"string"},"btc_trend":{"enum":["UP","DOWN","SIDEWAYS"],"type":"string"},"reasoning":{"type":"string"},"confidence":{"type":"number","maximum":1,"minimum":0},"fear_greed":{"type":"number","maximum":100,"minimum":0},"polymarket_edge":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_WRzhOQQ55BL2tfUUu50VL","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns live Polymarket prediction-market data per market including normalized YES/NO implied probabilities, 24h volume, liquidity, CLOB order-book spread, and resolution status.","exampleAgentPrompt":"What are the current Polymarket YES/NO odds and 24-hour volume for crypto prediction markets right now, including the order-book spread and liquidity?","exampleUseCases":null,"resultDescription":"A JSON object containing normalized YES/NO implied probabilities, 24h trading volume, liquidity depth, CLOB order-book spread, and resolution status for the queried Polymarket prediction market(s), plus a polymarket_edge object.","failureModes":["Missing or invalid PAYMENT-SIGNATURE header returns 402 Payment Required","Expired or already-used payment signature returns authentication error","Polymarket data temporarily unavailable returns 503 or timeout","Malformed request returns 400 Bad Request","Network or Base mainnet RPC issues may delay payment verification"],"whenToPreferThis":"Use this endpoint when you need live, normalized Polymarket prediction-market odds (implied probability) along with volume, liquidity, and CLOB spread data — especially when building crypto trading signals, sentiment analysis, or agent decision pipelines that incorporate crowd-sourced market probabilities as a data input.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:30:48.935Z","isFirstParty":false}