{"uid":"cap_J4QeAh9hE_fvZ4wFTwnLq","slug":"hostdefi-polymarket-prediction-history-3870530e","name":"HostDeFi Polymarket Prediction History","description":"HostDeFi is a Solana DEX with a free token safety scanner. Best-route swaps through Jupiter, EVM trading across 7 chains, native bridging, and live token risk grades. No KYC, 1% flat fee.","url":"https://rpc.hostdefi.com/api/v1/x402/predict/history?utm_source=zero.xyz","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","properties":{"marketId":{"type":"string","description":"Polymarket market id (conditionId, as listed by /v1/x402/predict/markets)"}}}}},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"ok":true,"count":120,"title":"Will it settle?","points":[[0,0.62,0.39]],"source":"polymarket","marketId":"…"}},"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_B093X0EdkQGshmxs6eU26","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns historical probability time-series data for a given Polymarket prediction market identified by its conditionId","exampleAgentPrompt":"Can you pull the historical probability data for the Polymarket market with condition ID 0xabc123def456 so I can see how the odds changed over time?","exampleUseCases":[{"title":"Charting prediction market odds over time","prompt":"Show me the full probability history for this Polymarket market — the condition ID is 0x3a4b5c6d7e8f — I want to see how the odds shifted from start to now."},{"title":"Research prior to placing a prediction bet","prompt":"Before I trade on Polymarket, can you pull the historical probability points for market ID 0xdeadbeef1234 so I can see whether the market has been volatile or stable?"},{"title":"Monitoring a market for resolution signals","prompt":"Has the probability on Polymarket market 0x9f8e7d6c5b4a been trending toward YES or NO lately? Grab its full history and summarize the recent trend."}],"resultDescription":"Returns a JSON object with ok status, a count of data points, the market title, an array of [timestamp, yes-probability, no-probability] tuples, the source (polymarket), and the market ID. Example: {ok:true, count:120, title:'Will it settle?', points:[[0,0.62,0.39]], source:'polymarket', marketId:'...'}","failureModes":["Invalid or unknown marketId returns empty result or error","Missing required marketId query parameter may return a 400 or empty response","Network or RPC node downtime causes endpoint unavailability","Polymarket market not indexed yet returns no data","Payment failure (x402) if USDC not provided correctly blocks the request"],"whenToPreferThis":"Choose this endpoint when you need historical probability time-series data for a specific Polymarket prediction market and have the conditionId on hand. It is useful for charting odds evolution, backtesting, and pre-trade research. Prefer it over manual Polymarket API scraping when you need a simple paid API call with structured output.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T00:49:32.318Z","isFirstParty":false,"canonicalSlug":"hostdefi-polymarket-prediction-history-3870530e"}