{"uid":"cap_6cOWRMwE2cjW52blfM4Jy","slug":"financial-data-x402-prediction-market-series-be495aea","name":"Financial Data x402 – Prediction Market Series","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://x402financialdata.com/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_UWm-XgDChtjZg2cCM9XQZ","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 all active prediction market contracts within a named series (e.g. Fed funds rate, election outcomes), including prices, probabilities, volume, and close dates, paid per-call via USDC over x402.","exampleAgentPrompt":"Pull up all the active prediction markets in the KXFEDFUNDSYEAR series — I want to see the yes/no probabilities, bid/ask prices, and how much volume each contract has traded.","exampleUseCases":[{"title":"Fed rate outlook probability check","prompt":"What probability are prediction markets currently assigning to the Fed funds rate staying above 1% through the end of 2037? Pull the full KXFEDFUNDSYEAR series so I can see all the contracts."},{"title":"Macro research dashboard feed","prompt":"I'm building a macro dashboard — can you fetch the latest prediction market data for the KXFEDFUNDSYEAR series so I can show live probabilities and 24-hour volume for each contract?"},{"title":"Algorithmic trading signal generation","prompt":"Get me the current yes_ask, yes_bid, and outcome probabilities for every market in the KXFEDFUNDSYEAR prediction series — I want to compare them against my model's forecasts."}],"resultDescription":"A JSON object containing the series ticker, total market count, and an array of market objects. Each market includes a unique ID, title, source (e.g. Kalshi), status (active/closed), yes ask/bid prices, outcome probabilities for Yes and No, close date, total USD volume, and 24-hour USD volume.","failureModes":["Invalid or unknown series_ticker returns empty markets array or 404","Payment failure (insufficient USDC balance) results in 402 response and no data returned","Series with no active markets returns count:0 and empty markets array","Stale data if underlying Kalshi feed is delayed","Rate-limiting or node issues on Base/Solana may cause payment processing delays"],"whenToPreferThis":"Choose this endpoint when you need structured prediction market data for a named series (e.g. macroeconomic rate forecasts) without API key setup or subscriptions. Ideal for agents that can pay micro-amounts in USDC via x402 and need real-time market probabilities, bid/ask spreads, and volume data from Kalshi. Prefer over traditional financial data APIs when you want pay-per-call pricing with no commitment.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-10T06:30:33.492Z","isFirstParty":false}