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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, status unknown (last checked 2026-09-15).
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
Success—
StatusUnknown
How this service works
Crypto and prediction market intelligence through x402.
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-disagreementWhen 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"
}
}Tags
x402
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