{
  "generated_at": "2026-04-24T15:01:35.625676+00:00",
  "slug": "prediction-markets-production-3e07-up-railway-app-api-markets",
  "title": "Prediction Markets \u00b7 Market Directory",
  "url": "https://prediction-markets-production-3e07.up.railway.app/api/markets",
  "category": "finance",
  "summary": "Search and filter prediction markets across categories with sorting by volume, recency, and closing proximity.",
  "seo": {
    "title": "Prediction Markets API - x402 Market Data Access",
    "description": "Query prediction markets by category, volume, and closing time via x402. Filter politics, crypto, sports, science, and culture markets. Base settlement."
  },
  "use_cases": [
    "Discover high-volume markets for liquidity analysis",
    "Monitor political event markets for sentiment signals",
    "Track crypto prediction markets for crowd wisdom",
    "Filter markets closing soon for time-sensitive strategies"
  ],
  "ideal_buyer": "Prediction market agents and sentiment analysis systems requiring filtered market discovery.",
  "example_prompt": "Find the top 20 crypto prediction markets sorted by trading volume",
  "example_request_body": {
    "sort": "volume",
    "limit": 20,
    "category": "crypto"
  },
  "risk_notes": [],
  "pricing_sanity": {
    "flag": "cheap",
    "ratio": 0.167,
    "median_category_atomic": 30000
  },
  "pricing_review_required": false,
  "pricing_decimal_suspect": false,
  "trust_tier": "indexed_external",
  "accepts": [
    {
      "scheme": "exact",
      "network": "base",
      "pay_to": "0x6e8b64638b24c6d625b045dd353120d850064e2e",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "max_amount_required_atomic": "5000",
      "max_timeout_seconds": 300,
      "verified": false,
      "hints": {
        "input": {
          "body": {
            "type": "object",
            "required": [],
            "properties": {
              "sort": {
                "enum": [
                  "volume",
                  "newest",
                  "closing_soon"
                ],
                "type": "string",
                "description": "Sort order. 'volume' = highest traded, 'newest' = recently created, 'closing_soon' = ending soonest. Default: volume."
              },
              "limit": {
                "type": "number",
                "description": "Number of markets to return (1-50). Default: 20."
              },
              "source": {
                "enum": [
                  "polymarket",
                  "kalshi"
                ],
                "type": "string",
                "description": "Filter by platform. Omit to get markets from both Polymarket and Kalshi."
              },
              "category": {
                "enum": [
                  "politics",
                  "crypto",
                  "sports",
                  "science",
                  "culture"
                ],
                "type": "string",
                "description": "Filter markets by topic category. Omit for all categories."
              }
            }
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "schema": {
            "type": "object",
            "required": [
              "results",
              "markets"
            ],
            "properties": {
              "query": {
                "type": "string",
                "description": "Search query"
              },
              "source": {
                "type": "string"
              },
              "markets": {
                "type": "array",
                "items": {
                  "type": "object",
                  "properties": {
                    "id": {
                      "type": "string"
                    },
                    "question": {
                      "type": "string"
                    },
                    "volume24h": {
                      "type": "number"
                    },
                    "probability": {
                      "type": "number"
                    },
                    "outcomePrices": {
                      "type": "object"
                    }
                  }
                }
              },
              "results": {
                "type": "number",
                "description": "Number of markets found"
              },
              "timestamp": {
                "type": "string"
              }
            }
          },
          "example": {}
        }
      }
    }
  ],
  "duplicate_cluster_id": "finance-cl-2bd7d97473e5",
  "origin": {
    "slug": "prediction-markets-production-3e07-up-railway-app",
    "host": "prediction-markets-production-3e07.up.railway.app",
    "title": "Prediction Markets API (Railway)",
    "description": "An x402-payable API origin hosted on Railway. The application endpoint returned a 404 error at time of indexing; the service may be inactive or relocated.",
    "url": "https://prediction-markets-production-3e07.up.railway.app",
    "favicon": "https://prediction-markets-production-3e07.up.railway.app/favicon.ico"
  },
  "json_ld": {
    "@id": "https://x402all.com/resource/prediction-markets-production-3e07-up-railway-app-api-markets",
    "url": "https://x402all.com/resource/prediction-markets-production-3e07-up-railway-app-api-markets",
    "name": "Prediction Markets \u00b7 Market Directory",
    "@type": "WebAPI",
    "offers": {
      "url": "https://x402all.com/resource/prediction-markets-production-3e07-up-railway-app-api-markets",
      "@type": "Offer",
      "price": "0.005",
      "availability": "https://schema.org/InStock",
      "priceCurrency": "USDC",
      "priceSpecification": {
        "@type": "UnitPriceSpecification",
        "price": "0.005000",
        "unitText": "call",
        "priceCurrency": "USDC"
      },
      "eligibleCustomerType": "Agent",
      "additionalProperty": [
        {
          "@type": "PropertyValue",
          "name": "paymentNetwork",
          "value": "base"
        },
        {
          "@type": "PropertyValue",
          "name": "paymentAsset",
          "value": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
        }
      ]
    },
    "sameAs": "https://prediction-markets-production-3e07.up.railway.app/api/markets",
    "@context": "https://schema.org",
    "provider": {
      "@id": "https://x402all.com/server/prediction-markets-production-3e07-up-railway-app",
      "url": "https://prediction-markets-production-3e07.up.railway.app",
      "name": "Prediction Markets API (Railway)",
      "@type": "Organization"
    },
    "identifier": "prediction-markets-production-3e07-up-railway-app-api-markets",
    "description": "Query prediction markets by category, volume, and closing time via x402. Filter politics, crypto, sports, science, and culture markets. Base settlement.",
    "potentialAction": {
      "@type": "BuyAction",
      "target": "https://axon402.com/test-buy?resource=prediction-markets-production-3e07-up-railway-app-api-markets",
      "description": "Test-buy this endpoint on AXON"
    },
    "applicationCategory": "finance"
  },
  "axon_deep_link": "https://axon402.com/test-buy?resource=prediction-markets-production-3e07-up-railway-app-api-markets"
}