GET /v1/calibration/venues/{venue}/{category}$0.03dailytier: datacache 3600sEngine A — Probability API
The audit rows behind the free venue-calibration scorecard for one venue and category: each resolved market with its pre-resolution implied probability at every captured horizon (24h, 7d, 30d), its outcome, and resolution time — recompute any cell yourself. The free scorecard shows which cells have depth before you pay.
Rows are newest-first, one row per market × captured horizon; a market missing a horizon row simply had no price at that horizon (listed late, or pre-accrual). Same pre-registered method as the free surface; free summary at /v1/calibration/venues.
| Name | In | Type | Required | Notes |
|---|---|---|---|---|
venue | path | string | yes | — one of "kalshi", "polymarket" |
category | path | string | yes | e.g. politics, economics, sports |
limit | query | integer | no | (default: 300) |
curl "https://x402-factory.com/v1/calibration/venues/kalshi/politics?limit=100"
Audit rows for one venue and category.
Worked example from deterministic fixture data (note meta.data_mode); live responses report their own sources and data_mode.
{
"data": {
"rows": [
{
"slug": "politics-market-0",
"resolved_at": "2026-07-18T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 24,
"implied_p": 0.78
},
{
"slug": "politics-market-0",
"resolved_at": "2026-07-18T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 168,
"implied_p": 0.934
},
{
"slug": "politics-market-0",
"resolved_at": "2026-07-18T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 720,
"implied_p": 0.786
},
{
"slug": "politics-market-1",
"resolved_at": "2026-07-17T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 24,
"implied_p": 0.143
},
{
"slug": "politics-market-1",
"resolved_at": "2026-07-17T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 168,
"implied_p": 0.559
},
{
"slug": "politics-market-1",
"resolved_at": "2026-07-17T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 720,
"implied_p": 0.687
},
{
"slug": "politics-market-2",
"resolved_at": "2026-07-16T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 24,
"implied_p": 0.761
},
{
"slug": "politics-market-2",
"resolved_at": "2026-07-16T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 168,
"implied_p": 0.517
},
{
"slug": "politics-market-2",
"resolved_at": "2026-07-16T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 720,
"implied_p": 0.679
},
{
"slug": "politics-market-3",
"resolved_at": "2026-07-15T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 24,
"implied_p": 0.544
},
{
"slug": "politics-market-3",
"resolved_at": "2026-07-15T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 168,
"implied_p": 0.383
},
{
"slug": "politics-market-3",
"resolved_at": "2026-07-15T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 720,
"implied_p": 0.286
},
{
"slug": "politics-market-4",
"resolved_at": "2026-07-14T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 24,
"implied_p": 0.16
},
{
"slug": "politics-market-4",
"resolved_at": "2026-07-14T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 168,
"implied_p": 0.198
},
{
"slug": "politics-market-4",
"resolved_at": "2026-07-14T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 720,
"implied_p": 0.728
},
{
"slug": "politics-market-5",
"resolved_at": "2026-07-13T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 24,
"implied_p": 0.097
},
{
"slug": "politics-market-5",
"resolved_at": "2026-07-13T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 168,
"implied_p": 0.602
},
{
"slug": "politics-market-5",
"resolved_at": "2026-07-13T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 720,
"implied_p": 0.704
},
{
"slug": "politics-market-6",
"resolved_at": "2026-07-12T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 24,
"implied_p": 0.684
},
{
"slug": "politics-market-6",
"resolved_at": "2026-07-12T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 168,
"implied_p": 0.495
},
{
"slug": "politics-market-6",
"resolved_at": "2026-07-12T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 720,
"implied_p": 0.17
},
{
"slug": "politics-market-7",
"resolved_at": "2026-07-11T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 24,
"implied_p": 0.361
},
{
"slug": "politics-market-7",
"resolved_at": "2026-07-11T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 168,
"implied_p": 0.729
},
{
"slug": "politics-market-7",
"resolved_at": "2026-07-11T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 720,
"implied_p": 0.694
},
{
"slug": "politics-market-8",
"resolved_at": "2026-07-10T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 24,
"implied_p": 0.874
},
{
"slug": "politics-market-8",
"resolved_at": "2026-07-10T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 168,
"implied_p": 0.387
},
{
"slug": "politics-market-8",
"resolved_at": "2026-07-10T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 720,
"implied_p": 0.079
},
{
"slug": "politics-market-9",
"resolved_at": "2026-07-09T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 24,
"implied_p": 0.201
},
{
"slug": "politics-market-9",
"resolved_at": "2026-07-09T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 168,
"implied_p": 0.659
},
{
"slug": "politics-market-9",
"resolved_at": "2026-07-09T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 720,
"implied_p": 0.153
},
{
"slug": "politics-market-10",
"resolved_at": "2026-07-08T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 24,
"implied_p": 0.721
},
{
"slug": "politics-market-10",
"resolved_at": "2026-07-08T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 168,
"implied_p": 0.882
},
{
"slug": "politics-market-10",
"resolved_at": "2026-07-08T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 720,
"implied_p": 0.914
},
{
"slug": "politics-market-11",
"resolved_at": "2026-07-07T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 24,
"implied_p": 0.274
},
{
"slug": "politics-market-11",
"resolved_at": "2026-07-07T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 168,
"implied_p": 0.612
},
{
"slug": "politics-market-11",
"resolved_at": "2026-07-07T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 720,
"implied_p": 0.057
},
{
"slug": "politics-market-12",
"resolved_at": "2026-07-06T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 24,
"implied_p": 0.735
},
{
"slug": "politics-market-12",
"resolved_at": "2026-07-06T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 168,
"implied_p": 0.233
},
{
"slug": "politics-market-12",
"resolved_at": "2026-07-06T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 720,
"implied_p": 0.659
},
{
"slug": "politics-market-13",
"resolved_at": "2026-07-05T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 24,
"implied_p": 0.119
},
{
"slug": "politics-market-13",
"resolved_at": "2026-07-05T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 168,
"implied_p": 0.817
},
{
"slug": "politics-market-13",
"resolved_at": "2026-07-05T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 720,
"implied_p": 0.539
},
{
"slug": "politics-market-14",
"resolved_at": "2026-07-04T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 24,
"implied_p": 0.212
},
{
"slug": "politics-market-14",
"resolved_at": "2026-07-04T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 168,
"implied_p": 0.587
},
{
"slug": "politics-market-14",
"resolved_at": "2026-07-04T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 720,
"implied_p": 0.401
},
{
"slug": "politics-market-15",
"resolved_at": "2026-07-03T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 24,
"implied_p": 0.892
},
{
"slug": "politics-market-15",
"resolved_at": "2026-07-03T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 168,
"implied_p": 0.435
},
{
"slug": "politics-market-15",
"resolved_at": "2026-07-03T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 720,
"implied_p": 0.943
},
{
"slug": "politics-market-16",
"resolved_at": "2026-07-02T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 24,
"implied_p": 0.565
},
{
"slug": "politics-market-16",
"resolved_at": "2026-07-02T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 168,
"implied_p": 0.701
},
{
"slug": "politics-market-16",
"resolved_at": "2026-07-02T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 720,
"implied_p": 0.895
},
{
"slug": "politics-market-17",
"resolved_at": "2026-07-01T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 24,
"implied_p": 0.45
},
{
"slug": "politics-market-17",
"resolved_at": "2026-07-01T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 168,
"implied_p": 0.912
},
{
"slug": "politics-market-17",
"resolved_at": "2026-07-01T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 720,
"implied_p": 0.593
},
{
"slug": "politics-market-18",
"resolved_at": "2026-06-30T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 24,
"implied_p": 0.903
},
{
"slug": "politics-market-18",
"resolved_at": "2026-06-30T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 168,
"implied_p": 0.934
},
{
"slug": "politics-market-18",
"resolved_at": "2026-06-30T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 720,
"implied_p": 0.411
},
{
"slug": "politics-market-19",
"resolved_at": "2026-06-29T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 24,
"implied_p": 0.612
},
{
"slug": "politics-market-19",
"resolved_at": "2026-06-29T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 168,
"implied_p": 0.74
},
{
"slug": "politics-market-19",
"resolved_at": "2026-06-29T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 720,
"implied_p": 0.341
},
{
"slug": "politics-market-20",
"resolved_at": "2026-06-28T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 24,
"implied_p": 0.206
},
{
"slug": "politics-market-20",
"resolved_at": "2026-06-28T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 168,
"implied_p": 0.457
},
{
"slug": "politics-market-20",
"resolved_at": "2026-06-28T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 720,
"implied_p": 0.072
},
{
"slug": "politics-market-21",
"resolved_at": "2026-06-27T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 24,
"implied_p": 0.05
},
{
"slug": "politics-market-21",
"resolved_at": "2026-06-27T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 168,
"implied_p": 0.36
},
{
"slug": "politics-market-21",
"resolved_at": "2026-06-27T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 720,
"implied_p": 0.165
},
{
"slug": "politics-market-22",
"resolved_at": "2026-06-26T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 24,
"implied_p": 0.453
},
{
"slug": "politics-market-22",
"resolved_at": "2026-06-26T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 168,
"implied_p": 0.564
},
{
"slug": "politics-market-22",
"resolved_at": "2026-06-26T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 720,
"implied_p": 0.642
},
{
"slug": "politics-market-23",
"resolved_at": "2026-06-25T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 24,
"implied_p": 0.623
},
{
"slug": "politics-market-23",
"resolved_at": "2026-06-25T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 168,
"implied_p": 0.096
},
{
"slug": "politics-market-23",
"resolved_at": "2026-06-25T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 720,
"implied_p": 0.43
},
{
"slug": "politics-market-24",
"resolved_at": "2026-06-24T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 24,
"implied_p": 0.926
},
{
"slug": "politics-market-24",
"resolved_at": "2026-06-24T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 168,
"implied_p": 0.927
},
{
"slug": "politics-market-24",
"resolved_at": "2026-06-24T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 720,
"implied_p": 0.52
},
{
"slug": "politics-market-25",
"resolved_at": "2026-06-23T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 24,
"implied_p": 0.529
},
{
"slug": "politics-market-25",
"resolved_at": "2026-06-23T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 168,
"implied_p": 0.458
},
{
"slug": "politics-market-25",
"resolved_at": "2026-06-23T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 720,
"implied_p": 0.209
},
{
"slug": "politics-market-26",
"resolved_at": "2026-06-22T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 24,
"implied_p": 0.161
},
{
"slug": "politics-market-26",
"resolved_at": "2026-06-22T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 168,
"implied_p": 0.132
},
{
"slug": "politics-market-26",
"resolved_at": "2026-06-22T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 720,
"implied_p": 0.24
},
{
"slug": "politics-market-27",
"resolved_at": "2026-06-21T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 24,
"implied_p": 0.285
},
{
"slug": "politics-market-27",
"resolved_at": "2026-06-21T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 168,
"implied_p": 0.285
},
{
"slug": "politics-market-27",
"resolved_at": "2026-06-21T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 720,
"implied_p": 0.63
},
{
"slug": "politics-market-28",
"resolved_at": "2026-06-20T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 24,
"implied_p": 0.611
},
{
"slug": "politics-market-28",
"resolved_at": "2026-06-20T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 168,
"implied_p": 0.901
},
{
"slug": "politics-market-28",
"resolved_at": "2026-06-20T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 720,
"implied_p": 0.106
},
{
"slug": "politics-market-29",
"resolved_at": "2026-06-19T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 24,
"implied_p": 0.359
},
{
"slug": "politics-market-29",
"resolved_at": "2026-06-19T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 168,
"implied_p": 0.106
},
{
"slug": "politics-market-29",
"resolved_at": "2026-06-19T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 720,
"implied_p": 0.648
},
{
"slug": "politics-market-30",
"resolved_at": "2026-07-18T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 24,
"implied_p": 0.681
},
{
"slug": "politics-market-30",
"resolved_at": "2026-07-18T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 168,
"implied_p": 0.816
},
{
"slug": "politics-market-30",
"resolved_at": "2026-07-18T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 720,
"implied_p": 0.933
},
{
"slug": "politics-market-31",
"resolved_at": "2026-07-17T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 24,
"implied_p": 0.93
},
{
"slug": "politics-market-31",
"resolved_at": "2026-07-17T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 168,
"implied_p": 0.427
},
{
"slug": "politics-market-31",
"resolved_at": "2026-07-17T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 720,
"implied_p": 0.343
},
{
"slug": "politics-market-32",
"resolved_at": "2026-07-16T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 24,
"implied_p": 0.14
},
{
"slug": "politics-market-32",
"resolved_at": "2026-07-16T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 168,
"implied_p": 0.263
},
{
"slug": "politics-market-32",
"resolved_at": "2026-07-16T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 720,
"implied_p": 0.52
},
{
"slug": "politics-market-33",
"resolved_at": "2026-07-15T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 24,
"implied_p": 0.491
},
{
"slug": "politics-market-33",
"resolved_at": "2026-07-15T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 168,
"implied_p": 0.286
},
{
"slug": "politics-market-33",
"resolved_at": "2026-07-15T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 720,
"implied_p": 0.428
},
{
"slug": "politics-market-34",
"resolved_at": "2026-07-14T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 24,
"implied_p": 0.347
},
{
"slug": "politics-market-34",
"resolved_at": "2026-07-14T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 168,
"implied_p": 0.629
},
{
"slug": "politics-market-34",
"resolved_at": "2026-07-14T00:00:00.000Z",
"outcome": 1,
"horizon_hours": 720,
"implied_p": 0.496
},
{
"slug": "politics-market-35",
"resolved_at": "2026-07-13T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 24,
"implied_p": 0.762
},
{
"slug": "politics-market-35",
"resolved_at": "2026-07-13T00:00:00.000Z",
"outcome": 0,
"horizon_hours": 168,
"implied_p": 0.228
},
{
"slug": "politics-market-35",
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},
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},
{
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},
{
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},
{
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}
],
"free_summary": "/v1/calibration/venues"
},
"meta": {
"endpoint": "/v1/calibration/venues/{venue}/{category}",
"version": "1.0.0",
"generated_at": "2026-10-05T10:15:58.010Z",
"freshness": "daily",
"sources": [
"kalshi"
],
"request_id": "req_00000000",
"docs": "https://x402-factory.com/docs/probability.venue-calibration-detail",
"data_mode": "live"
}
}data payload){
"type": "object",
"properties": {
"rows": {
"type": "array",
"items": {
"type": "object",
"properties": {
"slug": {
"type": "string"
},
"resolved_at": {
"type": "string"
},
"outcome": {
"type": "number"
},
"horizon_hours": {
"type": "number"
},
"implied_p": {
"type": "number"
}
},
"required": [
"slug",
"resolved_at",
"outcome",
"horizon_hours",
"implied_p"
],
"additionalProperties": false
}
},
"free_summary": {
"type": "string"
}
},
"required": [
"rows",
"free_summary"
],
"additionalProperties": false
}
The platform wraps every payload in an envelope: { "data": …, "meta": { endpoint, version, generated_at, freshness, sources, request_id, docs, data_mode } }.
Unpaid requests receive 402 with payment requirements (accepts). Pay $0.03 in USDC on Base per call via an X-PAYMENT header — see docs.x402.org. With PAYMENT_MODE=disabled (local dev) the endpoint is open.
| Status | Code | Meaning |
|---|---|---|
| 400 | INVALID_PARAMS | Input failed validation; message lists the offending fields. |
| 404 | NOT_FOUND | No matching resource; suggestion may point to a sibling endpoint. |
| 410 | RESOLVED | Market/event settled; body includes a resolution summary. |
| 503 | STALE_DATA | Upstream feed down; stale data is never silently served beyond 2× cache TTL. |
| 500 | INTERNAL | Our bug. The request_id helps us find it. |