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Api Endpoint

Polymarket Kalshi spread

Polymarket Kalshi spread. Get exact Polymarket and Kalshi yes prices, gap cents, the cheaper venue, and both market links. Pass ?q= as keywords, or omit q for the widest live gap. $0.01 USDC. Included in the hour pass. Includes a signed Ed25519 receipt you can check with the published key.

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Offering

Provider
aizamon.com
Method
GET
Offering type
Api Endpoint
Transport type
http
Category
Prediction Markets
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://aizamon.com/x402/v1/spread
MIME type
application/json
First seen
2026-10-16T01:58:03.323Z
Last seen
Tags
polymarket, kalshi, spread, arbitrage, X402, prediction-market, mispricing, under-cap, market-data

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
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "payTo": "0xB88544cF8E9E97EEb2F313e0D3528FC1e50C2887"
  }
]

Observed health

Status
Healthy
Latest latency
168 ms
Average latency
732 ms
HTTP status
402
Last checked
Reachability
100% 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",
        "HEAD",
        "DELETE"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {
        "q": {
          "type": "string",
          "description": "Market topic keywords. Omit for the top live gap."
        }
      }
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "method": {
          "enum": [
            "GET",
            "HEAD",
            "DELETE"
          ],
          "type": "string"
        },
        "queryParams": {
          "properties": {
            "q": {
              "description": "Market topic keywords. Omit for the top live gap.",
              "type": "string"
            }
          },
          "type": "object"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "properties": {
            "ok": {
              "type": "boolean"
            },
            "protocol": {
              "type": "string"
            },
            "result": {
              "type": "object"
            },
            "sku": {
              "type": "string"
            }
          },
          "type": "object"
        },
        "type": {
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}