← The evidence ledger
Evidence row 13580
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://polynews.news/api/v1/arbitrage
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 150ec9a33e9224b4e2448ac18245ca2addc9d84080015a85c96a698bb43f2615
- Leaf
- 0x8972bcb2a5b43aaa3f8e60688a6f007b3e94d5a9cae985a8579de09f8489f2ba
What was observed
{
"endpoints": [
[
"x402",
"https://polynews.news/api/v1/arbitrage"
]
],
"name": "polynews.news/api/v1/arbitrage",
"owner_address": "0x6ee49a7872844397fb52870cc07b308ffadc9427",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0x6ee49a7872844397Fb52870Cc07b308fFADC9427",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "76xzzgua9K8985GqGMwB946zTFtHvjTd9MfGoTYfys3d",
"scheme": "exact"
}
],
"description": "Cross-platform arbitrage detection between Polymarket and Kalshi: matched markets, price spreads, fee-adjusted EV. Coverage: liquid Polymarket markets in politics/geopolitics/elections/tech/economy/finance; low-volume long-tail, sports, culture, and weather are not included.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"category": "politics",
"limit": "50"
},
"type": "http"
},
"output": {
"example": {
"data": {
"computedAt": "2026-05-12T04:25:00.000Z",
"kalshiDataAgeSec": 45,
"matchedMarkets": 73,
"opportunities": [
{
"arbitrage": {
"confidence": "high",
"feeEstimate": 0.038,
"impliedProfit": 0.052,
"spreadNet": 0.052,
"spreadRaw": 0.09,
"type": "BUY_YES_POLY_NO_KALSHI"
},
"categoryPoly": "finance",
"id": "0xpoly__BTC200K-26DEC31",
"kalshiTitle": "BTC at or above $200,000 by Dec 31, 2026",
"kalshiYesAsk": 0.41,
"kalshiYesBid": 0.39,
"matchConfidence": 0.87,
"polymarketNoPrice": 0.68,
"polymarketQuestion": "Will Bitcoin reach $200K by Dec 31, 2026?",
"polymarketYesPrice": 0.32
}
],
"polymarketDataAgeSec": 30,
"totalKalshiMarkets": 13802,
"totalPolymarkets": 1074
},
"meta": {
"endpoint": "/api/v1/arbitrage",
"latencyMs": 1240,
"tier": "alpha",
"timestamp": "2026-05-12T04:30:00.000Z",
"version": "v1"
}
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"category": {
"type": "string"
},
"limit": {
"type": "string"
}
},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"data": {
"properties": {
"matchedMarkets": {
"type": "number"
},
"opportunities": {
"items": {
"properties": {
"arbitrage": {
"description": "Fee-adjusted arb calc",
"properties": {
"confidence": {
"description": "high | medium | low",
"type": "string"
},
"impliedProfit": {
"description": "Fee-adjusted EV",
"type": "number"
},
"spreadNet": {
"description": "After fees",
"type": "number"
},
"spreadRaw": {
"type": "number"
},
"type": {
"description": "e.g. BUY_YES_POLY_NO_KALSHI",
"type": "string"
}
},
"type": "object"
},
"kalshiTitle": {
"type": "string"
},
"kalshiYesAsk": {
"type": "number"
},
"matchConfidence": {
"type": "number"
},
"polymarketQuestion": {
"type": "string"
},
"polymarketYesPrice": {
"type": "number"
}
},
"type": "object"
},
"type": "array"
}
},
"type": "object"
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-26T12:08:06.509Z",
"quality": {
"l30DaysTotalCalls": 35,
"l30DaysUniquePayers": 4,
"lastCalledAt": "2026-10-26T12:08:06.196Z"
},
"resource": "https://polynews.news/api/v1/arbitrage",
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Cross-platform arbitrage detection between Polymarket and Kalshi: matched markets, price spreads, fee-adjusted EV. Coverage: liquid Polymarket markets in politics/geopolitics/elections/tech/economy/finance; low-volume long-tail, sports, culture, and weather are not included."
}What the leaf hashes
{"body":"150ec9a33e9224b4e2448ac18245ca2addc9d84080015a85c96a698bb43f2615","id":13580,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793025312562559,"prev":null,"subject":"x402_bazaar:https://polynews.news/api/v1/arbitrage","subject_kind":"source_record"}Proof
Its day has not closed yet. A day closes ten minutes after midnight UTC; the proof appears here then.