api.seerium.xyz
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.
TradingLiveeip155:8453Exactvia cdp
Calls · 30d
1
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 12 snapshots so far.
$22.04
Verified settled volume
1,024 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0010
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-09-24 11:00Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x81832eEDe3a4ad96CB3D7cA09977636D912fd3D5The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.001USDC≈ $0.001 USD
on Base · exact scheme
Pay 0.001 USDC on Base to 0x8183…fd3D5. The signed payment is good for 5 minutes.
- Paid to
- 0x8183…fd3D5
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 1000 smallest units
1000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 2h752k…jLFtZ
- Token contract
- EPjFWd…TDt1v
- Payment window
- 5 minutes
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x81832eEDe3a4ad96CB3D7cA09977636D912fd3D5",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb"
},
"payTo": "2h752kAbb9z1jpdSzqMEYg9JHv6TPJ6T2BfAJMyjLFtZ",
"amount": "1000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"limit": 25,
"minGap": 0.01,
"sources": "polymarket,kalshi,gemini",
"includeIndicative": true,
"minMatchConfidence": 0.7
}
},
"output": {
"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": "$0.0010",
"method": "GET",
"accepts": [
{
"payTo": "0x81832eEDe3a4ad96CB3D7cA09977636D912fd3D5",
"price": "$0.0010",
"scheme": "exact",
"network": "eip155:8453"
},
{
"payTo": "2h752kAbb9z1jpdSzqMEYg9JHv6TPJ6T2BfAJMyjLFtZ",
"price": "$0.0010",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
}
],
"networks": [
"eip155:8453",
"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
]
},
"service": "seerium-x402-api"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"limit": {
"type": "number",
"maximum": 100,
"minimum": 1,
"description": "Optional maximum disagreement rows to return. Defaults to 25."
},
"minGap": {
"type": "number",
"maximum": 1,
"minimum": 0,
"description": "Optional minimum price gap. Use 0.01 or 1 for one percentage point. Defaults to 0.01."
},
"sources": {
"type": "string",
"description": "Optional comma-separated venue filter: polymarket, kalshi, gemini. Defaults to all."
},
"includeIndicative": {
"type": "boolean",
"description": "Optional flag to include indicative price-only markets. Defaults to true."
},
"minMatchConfidence": {
"type": "number",
"maximum": 1,
"minimum": 0,
"description": "Optional minimum market match confidence. Use 0-1 or 0-100. Defaults to 0.7."
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-24 11:00Z
- Last indexed by Roundhouse
- 2026-09-25 09:10Z
- Last enriched (probe, favicon, geo)
- 2026-09-21 12:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 12 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service api.seerium.xyz and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=api.seerium.xyz' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://api.seerium.xyz/v1/prediction/cross-venue-disagreement, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.