{
  "x402Version": 2,
  "id": 31075,
  "slug": "31075",
  "resource": "https://polynews.news/api/v1/arbitrage",
  "description": "Cross-platform arbitrage detection between Polymarket and Kalshi: matched markets, price spreads, fee-adjusted EV. Coverage: liquid Polymarket markets in politics/geopolitics/elections/tech/economy/finance; low-volume long-tail, sports, culture, and weather are not included.",
  "type": "http",
  "resourceType": "Monitoring",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0x6ee49a7872844397Fb52870Cc07b308fFADC9427",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "10000",
      "amountUsd": 0.01,
      "maxTimeoutSeconds": 300
    },
    {
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "payTo": "76xzzgua9K8985GqGMwB946zTFtHvjTd9MfGoTYfys3d",
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "amount": "10000",
      "amountUsd": 0.01,
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "properties": {
      "example": {
        "properties": {
          "data": {
            "properties": {
              "matchedMarkets": {
                "type": "number"
              },
              "opportunities": {
                "items": {
                  "properties": {
                    "arbitrage": {
                      "description": "Fee-adjusted arb calc",
                      "properties": {
                        "confidence": {
                          "description": "high | medium | low",
                          "type": "string"
                        },
                        "impliedProfit": {
                          "description": "Fee-adjusted EV",
                          "type": "number"
                        },
                        "spreadNet": {
                          "description": "After fees",
                          "type": "number"
                        },
                        "spreadRaw": {
                          "type": "number"
                        },
                        "type": {
                          "description": "e.g. BUY_YES_POLY_NO_KALSHI",
                          "type": "string"
                        }
                      },
                      "type": "object"
                    },
                    "kalshiTitle": {
                      "type": "string"
                    },
                    "kalshiYesAsk": {
                      "type": "number"
                    },
                    "matchConfidence": {
                      "type": "number"
                    },
                    "polymarketQuestion": {
                      "type": "string"
                    },
                    "polymarketYesPrice": {
                      "type": "number"
                    }
                  },
                  "type": "object"
                },
                "type": "array"
              }
            },
            "type": "object"
          }
        },
        "type": "object"
      },
      "type": {
        "type": "string"
      }
    },
    "required": [
      "type"
    ],
    "type": "object"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "method": "GET",
          "queryParams": {
            "category": "politics",
            "limit": "50"
          },
          "type": "http"
        },
        "output": {
          "example": {
            "data": {
              "computedAt": "2026-05-12T04:25:00.000Z",
              "kalshiDataAgeSec": 45,
              "matchedMarkets": 73,
              "opportunities": [
                {
                  "arbitrage": {
                    "confidence": "high",
                    "feeEstimate": 0.038,
                    "impliedProfit": 0.052,
                    "spreadNet": 0.052,
                    "spreadRaw": 0.09,
                    "type": "BUY_YES_POLY_NO_KALSHI"
                  },
                  "categoryPoly": "finance",
                  "id": "0xpoly__BTC200K-26DEC31",
                  "kalshiTitle": "BTC at or above $200,000 by Dec 31, 2026",
                  "kalshiYesAsk": 0.41,
                  "kalshiYesBid": 0.39,
                  "matchConfidence": 0.87,
                  "polymarketNoPrice": 0.68,
                  "polymarketQuestion": "Will Bitcoin reach $200K by Dec 31, 2026?",
                  "polymarketYesPrice": 0.32
                }
              ],
              "polymarketDataAgeSec": 30,
              "totalKalshiMarkets": 13802,
              "totalPolymarkets": 1074
            },
            "meta": {
              "endpoint": "/api/v1/arbitrage",
              "latencyMs": 1240,
              "tier": "alpha",
              "timestamp": "2026-05-12T04:30:00.000Z",
              "version": "v1"
            }
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "queryParams": {
                "properties": {
                  "category": {
                    "type": "string"
                  },
                  "limit": {
                    "type": "string"
                  }
                },
                "type": "object"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "properties": {
                  "data": {
                    "properties": {
                      "matchedMarkets": {
                        "type": "number"
                      },
                      "opportunities": {
                        "items": {
                          "properties": {
                            "arbitrage": {
                              "description": "Fee-adjusted arb calc",
                              "properties": {
                                "confidence": {
                                  "description": "high | medium | low",
                                  "type": "string"
                                },
                                "impliedProfit": {
                                  "description": "Fee-adjusted EV",
                                  "type": "number"
                                },
                                "spreadNet": {
                                  "description": "After fees",
                                  "type": "number"
                                },
                                "spreadRaw": {
                                  "type": "number"
                                },
                                "type": {
                                  "description": "e.g. BUY_YES_POLY_NO_KALSHI",
                                  "type": "string"
                                }
                              },
                              "type": "object"
                            },
                            "kalshiTitle": {
                              "type": "string"
                            },
                            "kalshiYesAsk": {
                              "type": "number"
                            },
                            "matchConfidence": {
                              "type": "number"
                            },
                            "polymarketQuestion": {
                              "type": "string"
                            },
                            "polymarketYesPrice": {
                              "type": "number"
                            }
                          },
                          "type": "object"
                        },
                        "type": "array"
                      }
                    },
                    "type": "object"
                  }
                },
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "tags": [
    "bazaar"
  ],
  "sourceHost": "polynews.news",
  "lastUpdated": "2026-10-08T05:39:43.037Z",
  "quality": {
    "calls30d": 2,
    "uniquePayers30d": 2,
    "lastCalledAt": "2026-10-08T05:39:42.81Z"
  },
  "metadata": {
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "category": "politics",
              "limit": "50"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "data": {
                "computedAt": "2026-05-12T04:25:00.000Z",
                "kalshiDataAgeSec": 45,
                "matchedMarkets": 73,
                "opportunities": [
                  {
                    "arbitrage": {
                      "confidence": "high",
                      "feeEstimate": 0.038,
                      "impliedProfit": 0.052,
                      "spreadNet": 0.052,
                      "spreadRaw": 0.09,
                      "type": "BUY_YES_POLY_NO_KALSHI"
                    },
                    "categoryPoly": "finance",
                    "id": "0xpoly__BTC200K-26DEC31",
                    "kalshiTitle": "BTC at or above $200,000 by Dec 31, 2026",
                    "kalshiYesAsk": 0.41,
                    "kalshiYesBid": 0.39,
                    "matchConfidence": 0.87,
                    "polymarketNoPrice": 0.68,
                    "polymarketQuestion": "Will Bitcoin reach $200K by Dec 31, 2026?",
                    "polymarketYesPrice": 0.32
                  }
                ],
                "polymarketDataAgeSec": 30,
                "totalKalshiMarkets": 13802,
                "totalPolymarkets": 1074
              },
              "meta": {
                "endpoint": "/api/v1/arbitrage",
                "latencyMs": 1240,
                "tier": "alpha",
                "timestamp": "2026-05-12T04:30:00.000Z",
                "version": "v1"
              }
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "category": {
                      "type": "string"
                    },
                    "limit": {
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "data": {
                      "properties": {
                        "matchedMarkets": {
                          "type": "number"
                        },
                        "opportunities": {
                          "items": {
                            "properties": {
                              "arbitrage": {
                                "description": "Fee-adjusted arb calc",
                                "properties": {
                                  "confidence": {
                                    "description": "high | medium | low",
                                    "type": "string"
                                  },
                                  "impliedProfit": {
                                    "description": "Fee-adjusted EV",
                                    "type": "number"
                                  },
                                  "spreadNet": {
                                    "description": "After fees",
                                    "type": "number"
                                  },
                                  "spreadRaw": {
                                    "type": "number"
                                  },
                                  "type": {
                                    "description": "e.g. BUY_YES_POLY_NO_KALSHI",
                                    "type": "string"
                                  }
                                },
                                "type": "object"
                              },
                              "kalshiTitle": {
                                "type": "string"
                              },
                              "kalshiYesAsk": {
                                "type": "number"
                              },
                              "matchConfidence": {
                                "type": "number"
                              },
                              "polymarketQuestion": {
                                "type": "string"
                              },
                              "polymarketYesPrice": {
                                "type": "number"
                              }
                            },
                            "type": "object"
                          },
                          "type": "array"
                        }
                      },
                      "type": "object"
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    }
  },
  "liveness": {
    "reliability": null
  },
  "verified": false,
  "featured": false,
  "provider": {
    "host": "polynews.news",
    "manifest_name": "polynews.news",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-10-14T01:15:01.050Z"
  },
  "exampleResponse": {
    "example": {
      "data": {
        "matchedMarkets": 0,
        "opportunities": [
          {
            "arbitrage": {
              "confidence": "string",
              "impliedProfit": 0,
              "spreadNet": 0,
              "spreadRaw": 0,
              "type": "string"
            },
            "kalshiTitle": "string",
            "kalshiYesAsk": 0,
            "matchConfidence": 0,
            "polymarketQuestion": "string",
            "polymarketYesPrice": 0
          }
        ]
      }
    },
    "type": "string"
  }
}