Index onlineMerchant portal
Api Endpoint

polynews.news

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.

Open interactive test console

Offering

Provider
polynews.news
Method
GET
Offering type
Api Endpoint
Transport type
http
Category
Financial Analysis
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://polynews.news/api/v1/arbitrage
MIME type
application/json
First seen
2026-10-16T01:51:51.176Z
Last seen
Tags
Crypto, Search, Trading

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.01 USDC
Atomic price: 10000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2
0.01 USDC
Atomic price: 10000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "payTo": "0x6ee49a7872844397Fb52870Cc07b308fFADC9427"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "10000",
    "payTo": "76xzzgua9K8985GqGMwB946zTFtHvjTd9MfGoTYfys3d"
  }
]

Observed health

Status
Healthy
Latest latency
42 ms
Average latency
1038 ms
HTTP status
402
Last checked
Reachability
92.9% over 14 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {
        "category": {
          "type": "string"
        },
        "limit": {
          "type": "string"
        }
      }
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string"
    },
    "example": {
      "type": "object",
      "properties": {
        "data": {
          "type": "object",
          "properties": {
            "opportunities": {
              "type": "array",
              "items": {
                "type": "object",
                "properties": {
                  "polymarketQuestion": {
                    "type": "string"
                  },
                  "kalshiTitle": {
                    "type": "string"
                  },
                  "matchConfidence": {
                    "type": "number"
                  },
                  "polymarketYesPrice": {
                    "type": "number"
                  },
                  "kalshiYesAsk": {
                    "type": "number"
                  },
                  "arbitrage": {
                    "type": "object",
                    "description": "Fee-adjusted arb calc",
                    "properties": {
                      "type": {
                        "type": "string",
                        "description": "e.g. BUY_YES_POLY_NO_KALSHI"
                      },
                      "spreadRaw": {
                        "type": "number"
                      },
                      "spreadNet": {
                        "type": "number",
                        "description": "After fees"
                      },
                      "impliedProfit": {
                        "type": "number",
                        "description": "Fee-adjusted EV"
                      },
                      "confidence": {
                        "type": "string",
                        "description": "high | medium | low"
                      }
                    }
                  }
                }
              }
            },
            "matchedMarkets": {
              "type": "number"
            }
          }
        }
      }
    }
  },
  "required": [
    "type"
  ]
}