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Seerium Prediction Market Arbitrage API
x402
Seerium Prediction Market Arbitrage API is a paid API for AI agents from api.seerium.xyz, paid per call via x402, $0.003000/call, status unknown (last checked 2026-09-15).
Finds full-cover arbitrage opportunities across Polymarket, Kalshi, and Gemini by identifying YES+NO combinations with positive net edge
Price / call$0.003000
Success—
StatusUnknown
How this service works
Crypto and prediction market intelligence through x402.
Output
Returns a list of up to 20 arbitrage rows, each showing the YES and NO leg venues, contract details, prices, and the net positive edge available for a full-cover position spanning Polymarket, Kalshi, and/or Gemini.
Example use cases
Example prompt
“Can you scan Polymarket, Kalshi, and Gemini for full-cover arbitrage right now — show me up to 10 opportunities with at least 1% net edge, and include indicative rows too?”
Technical details
Endpoint
GEThttps://api.seerium.xyz/v1/prediction/arb/full-coverWhen to prefer
Choose this endpoint when you need to identify cross-venue prediction market arbitrage between Polymarket, Kalshi, and Gemini specifically, and want structured, pre-ranked opportunities with net edge already computed. Prefer over manual price comparison when you need real-time full-cover arb detection with venue filtering.
Side effects
- No arb opportunities found above the requested minEdge threshold
- Invalid sources parameter (non-supported venue name)
- limit exceeds hard cap of 20 — clamped or rejected
- Payment failure via x402 protocol
- Rate limiting or quota exhaustion
- Stale or indicative prices may not reflect executable fills
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"limit": 5,
"minEdge": 0.02,
"sources": "polymarket",
"includeIndicative": false
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"data": {
"rows": [],
"totals": {
"gemini": 937,
"groups": 5460,
"kalshi": 1000,
"entries": 0,
"fullCover": 0,
"polymarket": 858,
"sameOutcomeSpread": 0
},
"markets": 2795,
"criteria": {
"limit": 5,
"minEdge": 0.02,
"outcome": null,
"sources": [
"polymarket"
],
"strategy": "full_cover",
"includeIndicative": false
},
"returned": 0,
"warnings": [],
"updatedAt": "2026-06-08T04:32:35.270Z",
"totalCandidates": 0,
"sourceTimestamps": {
"gemini": 1780893003454,
"kalshi": 1780893060545,
"polymarket": 1780892863491
}
},
"meta": {
"maxLimit": 20,
"strategy": "full_cover",
"requestId": "58262535-aa48-4fce-8463-09f1386c0d5d",
"updatedAt": "2026-06-08T04:32:35.270Z",
"freshnessMs": 42490,
"generatedAt": "2026-06-08T04:33:17.760Z",
"returnedRows": 0,
"totalCandidates": 0
},
"product": {
"id": "prediction-arb-full-cover",
"name": "Prediction Market Arb Full Cover",
"path": "/v1/prediction/arb/full-cover",
"price": "$0.0030",
"method": "GET",
"accepts": [
{
"payTo": "0x81832eEDe3a4ad96CB3D7cA09977636D912fd3D5",
"price": "$0.0030",
"scheme": "exact",
"network": "eip155:8453"
},
{
"payTo": "2h752kAbb9z1jpdSzqMEYg9JHv6TPJ6T2BfAJMyjLFtZ",
"price": "$0.0030",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
}
],
"networks": [
"eip155:8453",
"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
]
},
"service": "seerium-x402-api"
}Schema · Response
{
"type": "json",
"example": {
"data": {
"rows": [
{
"id": "arb_full_cover_example",
"no": {
"side": "BUY",
"size": null,
"price": 0.54,
"source": "kalshi",
"outcome": "no",
"tokenId": "KXEXAMPLE:NO",
"question": "Will example event happen by Friday?",
"marketUrl": "https://kalshi.com/markets/kxexample",
"priceType": "ask",
"endDateIso": "2026-03-30T00:00:00.000Z",
"eventTitle": "Example Event",
"indicative": true,
"marketSlug": "KXEXAMPLE",
"totalDepth": null,
"conditionId": "KXEXAMPLE",
"eventTicker": null,
"marketTicker": "KXEXAMPLE",
"seriesTicker": null
},
"key": "question:will example event happen by friday:date:2026-03-30",
"yes": {
"side": "BUY",
"size": null,
"price": 0.42,
"source": "polymarket",
"outcome": "yes",
"tokenId": "poly_yes_token",
"question": "Will example event happen by Friday?",
"marketUrl": "https://polymarket.com/market/example-market",
"priceType": "ask",
"endDateIso": "2026-03-30T00:00:00.000Z",
"eventTitle": "Example Event",
"indicative": true,
"marketSlug": "example-market",
"totalDepth": null,
"conditionId": "0xexample",
"eventTicker": null,
"marketTicker": null,
"seriesTicker": null
},
"edge": 0.04,
"legs": [
{
"side": "BUY",
"size": null,
"price": 0.42,
"source": "polymarket",
"outcome": "yes",
"tokenId": "poly_yes_token",
"question": "Will example event happen by Friday?",
"marketUrl": "https://polymarket.com/market/example-market",
"priceType": "ask",
"endDateIso": "2026-03-30T00:00:00.000Z",
"eventTitle": "Example Event",
"indicative": true,
"marketSlug": "example-market",
"totalDepth": null,
"conditionId": "0xexample",
"eventTicker": null,
"marketTicker": null,
"seriesTicker": null
},
{
"side": "BUY",
"size": null,
"price": 0.54,
"source": "kalshi",
"outcome": "no",
"tokenId": "KXEXAMPLE:NO",
"question": "Will example event happen by Friday?",
"marketUrl": "https://kalshi.com/markets/kxexample",
"priceType": "ask",
"endDateIso": "2026-03-30T00:00:00.000Z",
"eventTitle": "Example Event",
"indicative": true,
"marketSlug": "KXEXAMPLE",
"totalDepth": null,
"conditionId": "KXEXAMPLE",
"eventTicker": null,
"marketTicker": "KXEXAMPLE",
"seriesTicker": null
}
],
"outcome": null,
"sources": [
"polymarket",
"kalshi"
],
"question": "Will example event happen by Friday?",
"strategy": "full_cover",
"feeBuffer": 0.002,
"grossEdge": 0.042,
"matchedOn": {
"dateKey": "2026-03-30",
"eventKey": "example event",
"numericKey": null,
"subjectKey": "will example event happen by friday",
"directionKey": null
},
"totalCost": 0.96,
"requiresShort": false
}
],
"totals": {
"gemini": 250,
"groups": 80,
"kalshi": 450,
"fullCover": 1,
"polymarket": 500,
"sameOutcomeSpread": 0
},
"markets": 1200,
"criteria": {
"limit": 20,
"minEdge": null,
"outcome": null,
"sources": [],
"strategy": "full_cover",
"includeIndicative": true
},
"returned": 1,
"warnings": [],
"updatedAt": "2026-03-25T11:59:30.000Z",
"totalCandidates": 1,
"sourceTimestamps": {
"gemini": 1760000000000,
"kalshi": 1760000000000,
"polymarket": 1760000000000
}
},
"meta": {
"requestId": "req_example_123",
"updatedAt": "2026-03-25T11:59:30.000Z",
"freshnessMs": 30000,
"generatedAt": "2026-03-25T12:00:00.000Z"
},
"product": {
"id": "prediction-arb-full-cover",
"name": "Prediction Market Arb Full Cover",
"path": "/v1/prediction/arb/full-cover",
"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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