Seerium Cross-Venue Prediction Market Disagreement API

x402

Seerium Cross-Venue Prediction Market Disagreement API is a paid API for AI agents from api.seerium.xyz, paid per call via x402, $0.002/call, not verified (last probed 2026-10-29); live alternatives: agentsvc.io Prediction Markets Search ($0.009) and Seerium Ending-Soon Prediction Markets API ($0.001).

Agents call it through Zero, which pays per call: no API key and no wallet of your own. New accounts start with $5. Live alternatives for the same use case: agentsvc.io Prediction Markets Search ($0.009) · Seerium Ending-Soon Prediction Markets API ($0.001).

Finds active prediction markets on Polymarket, Kalshi, and Gemini where the same outcome is priced differently across venues, returning price gaps, match confidence, liquidity, and volume.

Price / call$0.002

Seller volume →—

Success—

StatusUnknown

How this service works

Cross-venue prediction market disagreement API for Polymarket, Kalshi, and Gemini. Finds active related markets where venues price the same YES or NO outcome differently, with match confidence, price gap, liquidity, volume, and market identifiers.

Output

A ranked list of up to N cross-venue prediction market pairs where the same YES/NO outcome is priced differently, including: price gap, match confidence score, liquidity, volume, market identifiers for each venue, and which venues are involved in each disagreement.

Example use cases

Example prompt

“Show me the top 10 cross-venue prediction market disagreements between Polymarket, Kalshi, and Gemini where the price gap is at least 3 percentage points and match confidence is at least 80%, including indicative markets.”

Technical details

Endpoint

GEThttps://api.seerium.xyz/v1/prediction/cross-venue-disagreement?utm_source=zero.xyz

When to prefer

Use this endpoint when you need to identify cross-venue pricing discrepancies in prediction markets across Polymarket, Kalshi, and Gemini simultaneously. Prefer this over single-venue market APIs when the goal is arbitrage detection, cross-platform comparison, or surfacing markets where venues disagree on probabilities. Best for agents focused on prediction market intelligence, trading signals, or research on market efficiency.

Side effects

No markets found meeting minGap or minMatchConfidence thresholds — returns empty results
Invalid sources parameter (unrecognized venue name) — returns 400 or empty response
limit out of range (must be 1–100) — validation error
minGap or minMatchConfidence out of range (must be 0–1) — validation error
Payment not provided or insufficient — 402 Payment Required

Input

{
  "input": {
    "type": "http",
    "method": "GET",
    "queryParams": {
      "limit": 10,
      "minGap": 0.03,
      "sources": "polymarket,kalshi,gemini",
      "includeIndicative": true,
      "minMatchConfidence": 0.8
    }
  }
}

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

{
  "data": {
    "rows": [],
    "groups": 8223,
    "criteria": {
      "limit": 10,
      "minGap": 0.03,
      "sources": [
        "polymarket",
        "kalshi",
        "gemini"
      ],
      "includeIndicative": true,
      "minMatchConfidence": 0.8
    },
    "returned": 0,
    "warnings": [],
    "timestamp": 1781237553602,
    "sourceCounts": {
      "gemini": 1105,
      "kalshi": 1000,
      "polymarket": 831
    },
    "sourceUpdatedAt": {
      "gemini": "2026-06-12T04:12:11.082Z",
      "kalshi": "2026-06-12T04:10:09.913Z",
      "polymarket": "2026-06-12T04:07:46.652Z"
    },
    "totalCandidates": 0
  },
  "meta": {
    "groups": 8223,
    "maxLimit": 100,
    "requestId": "4cc0632e-caaf-47e8-955b-db2434343121",
    "updatedAt": "2026-06-12T04:12:11.082Z",
    "freshnessMs": 22520,
    "generatedAt": "2026-06-12T04:12:33.602Z",
    "returnedRows": 0,
    "totalCandidates": 0,
    "scannedSnapshots": 4033
  },
  "product": {
    "id": "prediction-cross-venue-disagreement",
    "name": "Cross-Venue Prediction Market Disagreement API",
    "path": "/v1/prediction/cross-venue-disagreement",
    "price": "$0.0020",
    "method": "GET",
    "accepts": [
      {
        "payTo": "0x81832eEDe3a4ad96CB3D7cA09977636D912fd3D5",
        "price": "$0.0020",
        "scheme": "exact",
        "network": "eip155:8453"
      },
      {
        "payTo": "2h752kAbb9z1jpdSzqMEYg9JHv6TPJ6T2BfAJMyjLFtZ",
        "price": "$0.0020",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
      }
    ],
    "networks": [
      "eip155:8453",
      "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
    ]
  },
  "service": "seerium-x402-api"
}

Schema · Response

{
  "type": "json",
  "example": {
    "data": {
      "rows": [
        {
          "id": "disagreement_example",
          "gap": 0.1,
          "lower": {
            "noAsk": 0.61,
            "noBid": 0.59,
            "price": 0.4,
            "source": "polymarket",
            "volume": 129300,
            "yesAsk": 0.41,
            "yesBid": 0.39,
            "noPrice": 0.6,
            "question": "Will Bitcoin be above $100,000 on May 31, 2026?",
            "yesPrice": 0.4,
            "eventSlug": "bitcoin-price-may-31-2026",
            "lastPrice": 0.4,
            "liquidity": 9400,
            "volume24h": 18450,
            "endDateIso": "2026-05-31T20:00:00.000Z",
            "eventTitle": "Bitcoin price on May 31, 2026",
            "indicative": false,
            "marketSlug": "will-bitcoin-be-above-100000-on-may-31-2026",
            "seriesSlug": "bitcoin",
            "conditionId": "0xexample-poly",
            "marketTicker": null,
            "seriesTicker": null,
            "sourceUpdatedAt": "2026-05-31T15:55:00.000Z"
          },
          "topic": "Bitcoin price on May 31, 2026: Will Bitcoin be above $100,000 on May 31, 2026?",
          "gapPct": 10,
          "higher": {
            "noAsk": 0.51,
            "noBid": 0.49,
            "price": 0.5,
            "source": "kalshi",
            "volume": 193200,
            "yesAsk": 0.51,
            "yesBid": 0.49,
            "noPrice": 0.5,
            "question": "Will Bitcoin be above $100,000 on May 31, 2026?",
            "yesPrice": 0.5,
            "eventSlug": "bitcoin-price-may-31-2026",
            "lastPrice": 0.5,
            "liquidity": 12800,
            "volume24h": 28450,
            "endDateIso": "2026-05-31T20:00:00.000Z",
            "eventTitle": "Bitcoin price on May 31, 2026",
            "indicative": true,
            "marketSlug": "kxbtc-26may31-b100000",
            "seriesSlug": "bitcoin",
            "conditionId": "KXBTC-26MAY31-B100000",
            "marketTicker": "KXBTC-26MAY31-B100000",
            "seriesTicker": "KXBTC",
            "sourceUpdatedAt": "2026-05-31T15:56:00.000Z"
          },
          "markets": [
            {
              "noAsk": 0.61,
              "noBid": 0.59,
              "price": 0.4,
              "source": "polymarket",
              "volume": 129300,
              "yesAsk": 0.41,
              "yesBid": 0.39,
              "noPrice": 0.6,
              "question": "Will Bitcoin be above $100,000 on May 31, 2026?",
              "yesPrice": 0.4,
              "eventSlug": "bitcoin-price-may-31-2026",
              "lastPrice": 0.4,
              "liquidity": 9400,
              "volume24h": 18450,
              "endDateIso": "2026-05-31T20:00:00.000Z",
              "eventTitle": "Bitcoin price on May 31, 2026",
              "indicative": false,
              "marketSlug": "will-bitcoin-be-above-100000-on-may-31-2026",
              "seriesSlug": "bitcoin",
              "conditionId": "0xexample-poly",
              "marketTicker": null,
              "seriesTicker": null,
              "sourceUpdatedAt": "2026-05-31T15:55:00.000Z"
            },
            {
              "noAsk": 0.51,
              "noBid": 0.49,
              "price": 0.5,
              "source": "kalshi",
              "volume": 193200,
              "yesAsk": 0.51,
              "yesBid": 0.49,
              "noPrice": 0.5,
              "question": "Will Bitcoin be above $100,000 on May 31, 2026?",
              "yesPrice": 0.5,
              "eventSlug": "bitcoin-price-may-31-2026",
              "lastPrice": 0.5,
              "liquidity": 12800,
              "volume24h": 28450,
              "endDateIso": "2026-05-31T20:00:00.000Z",
              "eventTitle": "Bitcoin price on May 31, 2026",
              "indicative": true,
              "marketSlug": "kxbtc-26may31-b100000",
              "seriesSlug": "bitcoin",
              "conditionId": "KXBTC-26MAY31-B100000",
              "marketTicker": "KXBTC-26MAY31-B100000",
              "seriesTicker": "KXBTC",
              "sourceUpdatedAt": "2026-05-31T15:56:00.000Z"
            }
          ],
          "outcome": "yes",
          "sources": [
            "polymarket",
            "kalshi"
          ],
          "matchType": "strong",
          "matchedOn": {
            "type": "strong",
            "dateKey": "2026-05-31",
            "eventKey": "bitcoin price on may 31 2026",
            "numericKey": "100000|31|2026",
            "subjectKey": "will bitcoin be above 100000 on may 31 2026",
            "directionKey": "above"
          },
          "rationale": "kalshi prices YES 10 points above polymarket on a strong cross-venue match.",
          "totalLiquidity": 22200,
          "totalVolume24h": 46900,
          "matchConfidence": 0.9,
          "minutesUntilEnd": 240
        }
      ],
      "groups": 42,
      "criteria": {
        "limit": 25,
        "minGap": 0.01,
        "sources": [
          "polymarket",
          "kalshi",
          "gemini"
        ],
        "includeIndicative": true,
        "minMatchConfidence": 0.7
      },
      "returned": 1,
      "warnings": [],
      "timestamp": 1760000000000,
      "sourceCounts": {
        "gemini": 3,
        "kalshi": 4,
        "polymarket": 5
      },
      "sourceUpdatedAt": {
        "gemini": "2026-05-31T15:54:30.000Z",
        "kalshi": "2026-05-31T15:56:00.000Z",
        "polymarket": "2026-05-31T15:55:00.000Z"
      },
      "totalCandidates": 14
    },
    "meta": {
      "requestId": "req_example_123",
      "updatedAt": "2026-03-25T11:59:30.000Z",
      "freshnessMs": 30000,
      "generatedAt": "2026-03-25T12:00:00.000Z"
    },
    "product": {
      "id": "prediction-cross-venue-disagreement",
      "name": "Cross-Venue Prediction Market Disagreement API",
      "path": "/v1/prediction/cross-venue-disagreement",
      "price": "$0.1000",
      "method": "GET",
      "accepts": [
        {
          "payTo": "0x81832eEDe3a4ad96CB3D7cA09977636D912fd3D5",
          "price": "$0.1000",
          "scheme": "exact",
          "network": "eip155:8453"
        },
        {
          "payTo": "2h752kAbb9z1jpdSzqMEYg9JHv6TPJ6T2BfAJMyjLFtZ",
          "price": "$0.1000",
          "scheme": "exact",
          "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
        }
      ],
      "networks": [
        "eip155:8453",
        "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
      ]
    },
    "service": "seerium-x402-api"
  }
}

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