{
  "x402Version": 2,
  "id": 5018,
  "slug": "5018",
  "resource": "https://graphadvocate.com/kalshi-polymarket/spread",
  "description": "Cross-source arbitrage spread between Kalshi and Polymarket on a topic. POST {topic, limit?}. Pulls matching markets from both venues (Politics + Elections overlap heavily), computes price mid-spread + arbitrage direction. JOIN that single-source passthrough APIs (incl. Pinax Token API) structurally can't return — this is what survives Pinax shipping Kalshi support later.",
  "type": "http",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0x0FF5A6ecef783BBA35463ec2F8403B9B5e9e7C86",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "50000",
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "limit": 5,
            "topic": "fed rate"
          },
          "bodyType": "json",
          "method": "POST",
          "type": "http"
        },
        "output": {
          "example": {
            "kalshi_candidates": 3,
            "pairs": [
              {
                "arbitrage_direction": "long-poly-short-kalshi",
                "kalshi_ticker": "KXFED-25DEC-CUT25",
                "kalshi_yes_mid": 0.62,
                "polymarket_market_slug": "fed-rate-cut-december",
                "polymarket_yes_mid": 0.58,
                "spread_bps": 400,
                "spread_yes_kalshi_minus_poly": 0.04
              }
            ],
            "polymarket_candidates": 2,
            "topic_keyword": "fed rate"
          },
          "type": "json"
        }
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        "$schema": "https://json-schema.org/draft/2020-12/schema",
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                    "maximum": 10,
                    "minimum": 1,
                    "type": "integer"
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                  "topic": {
                    "type": "string"
                  }
                },
                "required": [
                  "topic"
                ],
                "type": "object"
              },
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                "enum": [
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                  "text"
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                "type": "string"
              }
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              "method",
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              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "tags": [
    "bazaar"
  ],
  "sourceHost": "graphadvocate.com",
  "lastUpdated": "2026-09-02T20:51:35.088Z",
  "quality": {
    "calls30d": 1,
    "uniquePayers30d": 1,
    "lastCalledAt": "2026-09-02T20:51:34.863Z"
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  "verified": false,
  "featured": false,
  "provider": {
    "host": "graphadvocate.com",
    "manifest_name": "graphadvocate.com",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-09-18T22:00:31.484Z"
  }
}