{"uid":"cap_yM_R725WK1HBeSnzhOVDE","slug":"prediction-market-series-data-2af039be","name":"Prediction Market Series Data","description":"Pay-per-call stock, macro, on-chain, and crypto data over the x402 protocol. USDC on Base or Solana, no API keys, no subscriptions.","url":"https://x402-stock-indicators.vercel.app/prediction-market-series/%7Bseries_ticker%7D","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"required":{"type":"string"},"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"note":null,"count":1,"markets":[{"id":"KXFEDFUNDSYEAR-37JAN01-T1.00","title":"Fed funds rate at year end","source":"kalshi","status":"active","yes_ask":0.75,"yes_bid":0.74,"outcomes":[{"name":"Yes","probability":0.74},{"name":"No","probability":0.26}],"close_date":"2037-01-01T04:59:00Z","volume_usd":128400,"volume_24h_usd":3200}],"series_ticker":"KXFEDFUNDSYEAR"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_-226l17Pl20QgWc6J89oG","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns active prediction market contracts and probabilities for a given Kalshi series ticker, including yes/no odds, volume, and close dates.","exampleAgentPrompt":"What are the current prediction market odds and bid/ask prices for the Fed funds rate year-end series — pull the active Kalshi contracts for ticker KXFEDFUNDSYEAR.","exampleUseCases":[{"title":"Fed rate decision probability check","prompt":"What do prediction markets currently say about where the Fed funds rate will be at year end? Get the active Kalshi contracts for KXFEDFUNDSYEAR with their yes/no probabilities and volume."},{"title":"Macro event trading signal","prompt":"I want to see the current bid and ask prices on the Kalshi prediction market for the KXELECTION series — show me all active contracts with their close dates and 24-hour volume."},{"title":"Portfolio hedge via prediction odds","prompt":"Pull the latest Kalshi prediction market data for ticker KXCPI so I can see the probability distribution across active contracts and decide if I should hedge my bond position."}],"resultDescription":"A JSON object containing the series ticker, a count of markets, and an array of market objects each with: a unique market ID, title, source (e.g. Kalshi), status (active/closed), yes_ask, yes_bid prices, outcome names and probabilities, close date (ISO 8601), total USD volume, and 24-hour USD volume.","failureModes":["Invalid or unknown series_ticker returns empty markets array or 404","Payment failure over x402 protocol returns 402 Payment Required","Stale or delisted series may return markets with closed status","Network or Vercel cold-start latency may cause occasional timeouts","Malformed ticker format may return 400 or empty response"],"whenToPreferThis":"Choose this endpoint when you need real-time Kalshi prediction market contract data for a specific series, including bid/ask spreads, probability distributions, and volume — especially in a pay-per-call context without subscription overhead. Prefer over direct Kalshi API access when you want instant, no-auth access via USDC micropayment on Base or Solana.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T00:44:21.325Z","isFirstParty":false}