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mirrored listing x402 eip155:8453eip155:137eip155:42161solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp

Find prediction-market questions priced differently on Polymarket vs

Find prediction-market questions priced differently on Polymarket vs. Kalshi — a cross-platform divergence signal built from data no single-platform competitor has

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Claim this listing
5000 (raw units)
price
3
calls / 30d
3
unique payers
2026-09-08
updated

Provider

x402tap.com · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "5000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "5000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "9fqXniDAn8hNMYC5C9waGv5u126bkwjU6qGgAoQeoWyo",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "5000",
    "maxTimeoutSeconds": 300
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "limit": "5",
          "minDivergencePct": "10"
        },
        "type": "http"
      },
      "output": {
        "example": {
          "count": 1,
          "matches": [
            {
              "cheaperYesOn": "kalshi",
              "divergencePct": 12.4,
              "kalshi": {
                "subTitle": null,
                "ticker": "KXFED-99",
                "title": "Fed cuts rates at September FOMC meeting?",
                "yesProbability": 0.496
              },
              "matchScore": 0.5,
              "polymarket": {
                "question": "Will the Fed cut rates in September?",
                "slug": "example-market",
                "volume24hr": 45678.9,
                "yesProbability": 0.62
              }
            }
          ],
          "minDivergencePct": 10,
          "note": "Matches are found by keyword-overlap similarity...",
          "query": null
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "properties": {
                "limit": {
                  "description": "Max matches to return, 1-25 (default 10)",
                  "type": "string"
                },
                "minDivergencePct": {
                  "description": "Minimum probability-point divergence to include, 0-100 (default 5)",
                  "type": "string"
                },
                "q": {
                  "description": "Optional keyword filter on the matched question text",
                  "type": "string"
                }
              },
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  },
  "offer-receipt": {
    "info": {
      "offers": [
        {
          "acceptIndex": 0,
          "format": "eip712",
          "payload": {
            "amount": "5000",
            "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
            "network": "eip155:8453",
            "payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
            "resourceUrl": "https://x402tap.com/api/prediction-arb",
            "scheme": "exact",
            "validUntil": 1788857082,
            "version": 1
          },
          "signature": "0xa347d3587c99f4fda8784705a19f157713514a6ea9da7eeca01176353bc67e1706ea50b09d0a12a5fcb62fbb89956ab2191ac5b865ccc1c38df4ed1723b9bef01b"
        },
        {
          "acceptIndex": 1,
          "format": "eip712",
          "payload": {
            "amount": "5000",
            "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
            "network": "eip155:137",
            "payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
            "resourceUrl": "https://x402tap.com/api/prediction-arb",
            "scheme": "exact",
            "validUntil": 1788857082,
            "version": 1
          },
          "signature": "0x73c14a39b4d24d89b23756c856f0352986d5c53dac97d2cec578a09c523e7a551e8bcc693a80cf56442d081f3fb7595756beb7f57fb3ec27421ab4abf746c4971b"
        },
        {
          "acceptIndex": 2,
          "format": "eip712",
          "payload": {
            "amount": "5000",
            "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
            "network": "eip155:42161",
            "payTo": "0xB810B599bc730Aa85800BABe7f5d160524322C86",
            "resourceUrl": "https://x402tap.com/api/prediction-arb",
            "scheme": "exact",
            "validUntil": 1788857082,
            "version": 1
          },
          "signature": "0x232c972f634ba84264282173dae10d8498e55595583e9c9319c597bc9a348d2a0b7e6e29de0ec19e4fb84073afaf302fdd50bfd06880296ee096b695a7612fe11b"
        },
        {
          "acceptIndex": 3,
          "format": "eip712",
          "payload": {
            "amount": "5000",
            "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
            "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
            "payTo": "9fqXniDAn8hNMYC5C9waGv5u126bkwjU6qGgAoQeoWyo",
            "resourceUrl": "https://x402tap.com/api/prediction-arb",
            "scheme": "exact",
            "validUntil": 1788857082,
            "version": 1
          },
          "signature": "0x105064b7c59e495a15c29a3cde091c470407dc49688793e8958d9f2abaff2fce27fc79eff6806d341a3d2f763f3fe5ea39756bc38f5b4ce328a1526e51bf62071b"
        }
      ]
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "offers": {
          "items": {
            "properties": {
              "acceptIndex": {
                "type": "integer"
              },
              "format": {
                "type": "string"
              },
              "payload": {
                "properties": {
                  "amount": {
                    "type": "string"
                  },
                  "asset": {
                    "type": "string"
                  },
                  "network": {
                    "type": "string"
                  },
                  "payTo": {
                    "type": "string"
                  },
                  "resourceUrl": {
                    "type": "string"
                  },
                  "scheme": {
                    "type": "string"
                  },
                  "validUntil": {
                    "type": "integer"
                  },
                  "version": {
                    "type": "integer"
                  }
                },
                "required": [
                  "version",
                  "resourceUrl",
                  "scheme",
                  "network",
                  "asset",
                  "payTo",
                  "amount"
                ],
                "type": "object"
              },
              "signature": {
                "type": "string"
              }
            },
            "required": [
              "format",
              "signature"
            ],
            "type": "object"
          },
          "type": "array"
        }
      },
      "required": [
        "offers"
      ],
      "type": "object"
    }
  }
}

Use it

curl

curl "https://x402tap.com/api/prediction-arb"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://x402tap.com/api/prediction-arb");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://x402tap.com/api/prediction-arb")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/1139.json, and this resource appears in /discovery/resources and /discovery/search.