api.seerium.xyz
Prediction market arbitrage API for Polymarket, Kalshi, and Gemini. Finds full-cover YES plus NO combinations with positive net edge.
DataLiveeip155:8453Exactvia cdp
Settlements · 30d
29
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$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": 3,
"minEdge": 0,
"sources": "polymarket,kalshi,gemini",
"includeIndicative": true
}
},
"output": {
"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": "$0.0010",
"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": 20,
"minimum": 1,
"description": "Optional maximum arb rows to return. Defaults to 20 and is hard-capped at 20."
},
"minEdge": {
"type": "number",
"minimum": 0,
"description": "Optional minimum net arb edge as a decimal or percentage-style value."
},
"sources": {
"type": "string",
"description": "Optional comma-separated venue filter: polymarket, kalshi, gemini."
},
"includeIndicative": {
"type": "boolean",
"description": "Optional flag for indicative price-only rows. Defaults to true."
}
},
"additionalProperties": false
}
},
"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 02:30Z
- Last enriched (probe, favicon, geo)
- 2026-09-21 10:15Z
- 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
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. 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/arb/full-cover, 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.