{"uid":"cap_oAIQmQK7Os-UZ6D2dKhLe","slug":"financial-data-x402-prediction-markets-search-d10380a4","name":"Financial Data x402 – Prediction Markets Search","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-markets","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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["keyword"],"properties":{"limit":{"type":"integer","description":"Max markets per source, default 10."},"keyword":{"type":"string","description":"Search term, e.g. 'fed rate', 'recession', 'election'"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"kalshi":{"error":null,"markets":[],"search_coverage":"best-effort: Kalshi has no keyword-search API, so this scans only the first ~1,600 open markets by internal ordering; a match outside that window will not appear here"},"keyword":"fed rate","polymarket":{"error":null,"markets":[{"id":"fed-rate-hike-in-2026","title":"Fed rate hike in 2026?","source":"polymarket","status":"active","outcomes":[{"name":"Yes","probability":0.615},{"name":"No","probability":0.385}],"close_date":"2026-12-09T00:00:00Z","volume_usd":5645666.92,"volume_24h_usd":624904.36}]}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.03","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":"$0.03/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.03","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.03","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_K2jC4f1vqh01sMOiDX2A5","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.03","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Search active prediction markets on Polymarket and Kalshi by keyword, returning probabilities, volumes, and close dates","exampleAgentPrompt":"Search prediction markets for 'fed rate' and show me the top 5 results from Polymarket and Kalshi — I want to see the current probabilities and trading volumes.","exampleUseCases":[{"title":"Fed rate decision probability lookup","prompt":"What are the current Polymarket and Kalshi odds that the Fed will hike rates in 2026? Show me up to 10 markets and their probabilities."},{"title":"Election market research","prompt":"Search prediction markets for 'election' and pull the top 10 results — I want to see which ones are most actively traded and what the current probabilities are."},{"title":"Crypto event market discovery","prompt":"Find active prediction markets about 'Bitcoin ETF' on Polymarket and Kalshi, show me up to 5 per source with their outcome probabilities and close dates."}],"resultDescription":"A JSON object keyed by source (e.g. 'polymarket', 'kalshi'), each containing a list of active markets matching the keyword. Each market includes an id, title, status, a list of outcomes with names and probabilities (0–1), a close date, total volume in USD, and 24-hour volume. Kalshi results carry a note that coverage is best-effort due to API limitations (~1,600 markets scanned).","failureModes":["Keyword matches no markets: empty markets array returned for one or both sources","Kalshi API limitation: markets outside the first ~1,600 open markets by internal ordering will not appear","Source API outage: error field populated for the affected source, other sources may still return data","Invalid or missing keyword parameter: request rejected with schema validation error","Payment failure: x402 payment not accepted, call not executed"],"whenToPreferThis":"Use this endpoint when an agent needs real-time crowd-sourced probability estimates on macro, political, or crypto events from decentralized prediction markets. Prefer it over traditional financial data APIs when you want market-implied probabilities (not prices) for future events, or when you need no API key and are willing to pay per call via USDC over x402.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:31:59.066Z","isFirstParty":false}