{
  "x402Version": 2,
  "id": 40009,
  "slug": "40009",
  "resource": "https://api.seerium.xyz/v1/prediction/arb/same-outcome-spread",
  "description": "Prediction market arbitrage and same-outcome spread API for Polymarket, Kalshi, and Gemini. Finds YES or NO price gaps across venues.",
  "type": "http",
  "resourceType": "Utilities",
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      "network": "eip155:8453",
      "payTo": "0x81832eEDe3a4ad96CB3D7cA09977636D912fd3D5",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
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  "extensions": {
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          "queryParams": {
            "includeIndicative": true,
            "limit": 3,
            "minEdge": 0,
            "sources": "polymarket,kalshi,gemini"
          },
          "type": "http"
        },
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              "criteria": {
                "includeIndicative": true,
                "limit": 20,
                "minEdge": null,
                "outcome": "yes",
                "sources": [],
                "strategy": "same_outcome_spread"
              },
              "markets": 1200,
              "returned": 1,
              "rows": [
                {
                  "buy": {
                    "conditionId": "GEMEXAMPLE",
                    "endDateIso": "2026-03-30T00:00:00.000Z",
                    "eventTicker": null,
                    "eventTitle": "Example Event",
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                    "marketUrl": "https://polymarket.com/market/example-market",
                    "outcome": "yes",
                    "price": 0.42,
                    "priceType": "ask",
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                    "side": "BUY",
                    "size": null,
                    "source": "gemini",
                    "tokenId": "GEMEXAMPLE:YES",
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                  "edge": 0.035,
                  "feeBuffer": 0.002,
                  "grossEdge": 0.037,
                  "id": "arb_same_outcome_example",
                  "key": "question:will example event happen by friday:date:2026-03-30",
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                    {
                      "conditionId": "GEMEXAMPLE",
                      "endDateIso": "2026-03-30T00:00:00.000Z",
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                      "size": null,
                      "source": "gemini",
                      "tokenId": "GEMEXAMPLE:YES",
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                      "conditionId": "0xexample",
                      "endDateIso": "2026-03-30T00:00:00.000Z",
                      "eventTicker": null,
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                      "indicative": true,
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                      "marketTicker": null,
                      "marketUrl": "https://polymarket.com/market/example-market",
                      "outcome": "yes",
                      "price": 0.457,
                      "priceType": "bid",
                      "question": "Will example event happen by Friday?",
                      "seriesTicker": null,
                      "side": "SELL",
                      "size": null,
                      "source": "polymarket",
                      "tokenId": "poly_yes_token",
                      "totalDepth": null
                    }
                  ],
                  "matchedOn": {
                    "dateKey": "2026-03-30",
                    "directionKey": null,
                    "eventKey": "example event",
                    "numericKey": null,
                    "subjectKey": "will example event happen by friday"
                  },
                  "outcome": "yes",
                  "question": "Will example event happen by Friday?",
                  "requiresShort": true,
                  "sell": {
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                    "marketTicker": null,
                    "marketUrl": "https://polymarket.com/market/example-market",
                    "outcome": "yes",
                    "price": 0.457,
                    "priceType": "bid",
                    "question": "Will example event happen by Friday?",
                    "seriesTicker": null,
                    "side": "SELL",
                    "size": null,
                    "source": "polymarket",
                    "tokenId": "poly_yes_token",
                    "totalDepth": null
                  },
                  "sources": [
                    "gemini",
                    "polymarket"
                  ],
                  "spread": 0.037,
                  "strategy": "same_outcome_spread"
                }
              ],
              "sourceTimestamps": {
                "gemini": 1760000000000,
                "kalshi": 1760000000000,
                "polymarket": 1760000000000
              },
              "totalCandidates": 1,
              "totals": {
                "fullCover": 0,
                "gemini": 250,
                "groups": 80,
                "kalshi": 450,
                "polymarket": 500,
                "sameOutcomeSpread": 1
              },
              "updatedAt": "2026-03-25T11:59:30.000Z",
              "warnings": []
            },
            "meta": {
              "freshnessMs": 30000,
              "generatedAt": "2026-03-25T12:00:00.000Z",
              "requestId": "req_example_123",
              "updatedAt": "2026-03-25T11:59:30.000Z"
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              "method": "GET",
              "name": "Prediction Market Same Outcome Spread",
              "networks": [
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                "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
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              "path": "/v1/prediction/arb/same-outcome-spread",
              "price": "$0.1000"
            },
            "service": "seerium-x402-api"
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      },
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                    "description": "Optional flag for indicative price-only rows. Defaults to true.",
                    "type": "boolean"
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                    "description": "Optional maximum arb rows to return. Defaults to 20 and is hard-capped at 20.",
                    "maximum": 20,
                    "minimum": 1,
                    "type": "number"
                  },
                  "minEdge": {
                    "description": "Optional minimum net arb edge as a decimal or percentage-style value.",
                    "minimum": 0,
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                  },
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  },
  "tags": [
    "bazaar"
  ],
  "sourceHost": "api.seerium.xyz",
  "lastUpdated": "2026-10-08T06:09:37.552Z",
  "quality": {
    "calls30d": 2,
    "uniquePayers30d": 2,
    "lastCalledAt": "2026-10-08T06:09:37.399Z"
  },
  "metadata": {
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              "sources": "polymarket,kalshi,gemini"
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                  "limit": 20,
                  "minEdge": null,
                  "outcome": "yes",
                  "sources": [],
                  "strategy": "same_outcome_spread"
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                      "endDateIso": "2026-03-30T00:00:00.000Z",
                      "eventTicker": null,
                      "eventTitle": "Example Event",
                      "indicative": true,
                      "marketSlug": "GEMEXAMPLE",
                      "marketTicker": null,
                      "marketUrl": "https://polymarket.com/market/example-market",
                      "outcome": "yes",
                      "price": 0.42,
                      "priceType": "ask",
                      "question": "Will example event happen by Friday?",
                      "seriesTicker": null,
                      "side": "BUY",
                      "size": null,
                      "source": "gemini",
                      "tokenId": "GEMEXAMPLE:YES",
                      "totalDepth": null
                    },
                    "edge": 0.035,
                    "feeBuffer": 0.002,
                    "grossEdge": 0.037,
                    "id": "arb_same_outcome_example",
                    "key": "question:will example event happen by friday:date:2026-03-30",
                    "legs": [
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                        "conditionId": "GEMEXAMPLE",
                        "endDateIso": "2026-03-30T00:00:00.000Z",
                        "eventTicker": null,
                        "eventTitle": "Example Event",
                        "indicative": true,
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                        "endDateIso": "2026-03-30T00:00:00.000Z",
                        "eventTicker": null,
                        "eventTitle": "Example Event",
                        "indicative": true,
                        "marketSlug": "example-market",
                        "marketTicker": null,
                        "marketUrl": "https://polymarket.com/market/example-market",
                        "outcome": "yes",
                        "price": 0.457,
                        "priceType": "bid",
                        "question": "Will example event happen by Friday?",
                        "seriesTicker": null,
                        "side": "SELL",
                        "size": null,
                        "source": "polymarket",
                        "tokenId": "poly_yes_token",
                        "totalDepth": null
                      }
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                    "matchedOn": {
                      "dateKey": "2026-03-30",
                      "directionKey": null,
                      "eventKey": "example event",
                      "numericKey": null,
                      "subjectKey": "will example event happen by friday"
                    },
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                    "question": "Will example event happen by Friday?",
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                    "sell": {
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                      "endDateIso": "2026-03-30T00:00:00.000Z",
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                      "source": "polymarket",
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                      "totalDepth": null
                    },
                    "sources": [
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                      "polymarket"
                    ],
                    "spread": 0.037,
                    "strategy": "same_outcome_spread"
                  }
                ],
                "sourceTimestamps": {
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                  "kalshi": 1760000000000,
                  "polymarket": 1760000000000
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                "totals": {
                  "fullCover": 0,
                  "gemini": 250,
                  "groups": 80,
                  "kalshi": 450,
                  "polymarket": 500,
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                "updatedAt": "2026-03-25T11:59:30.000Z",
                "warnings": []
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    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-10-14T01:15:01.050Z"
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