← The evidence ledger
Evidence row 66067
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://api.dripmetrics.ai/metrics/roll-spread
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 20b443ef16f232bafe495d54d3c4f48e1d7320d5fa7d73b7ef550df6c3dd6d93
- Leaf
- 0xa3fafd2a831181089466a976db1600c2226639acbf865aad1ec5f36c0965a2a1
What was observed
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],
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"extensions": {
"bazaar": {
"info": {
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"queryParams": {
"exchange": "coinbase",
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"window": "30m"
},
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"observations": 28,
"strictRollDefined": false
},
"computedAt": "2026-05-23T14:00:00.000Z",
"coverage": {
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"exchange": "coinbase",
"firstTradeTime": "2026-05-23T13:00:02.000Z",
"lastTradeTime": "2026-05-23T13:59:58.000Z",
"metric": "roll-spread",
"pair": "BTC-USD",
"tradeCount": 428,
"value": 3.2145,
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},
"lastUpdated": "2026-10-21T05:03:59.381Z",
"quality": {
"l30DaysTotalCalls": 5,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-21T05:03:58.897Z"
},
"resource": "https://api.dripmetrics.ai/metrics/roll-spread",
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "DripMetricsAI (api description at https://dripmetrics.ai/) provides on-demand market microstructure and risk metrics for agents and developers. Agents can pay per request via x402 and receive structured JSON metrics without subscriptions or API keys. Roll Spread estimates an absolute covariance spread proxy derived from lagged price changes. Discovery examples use the latest 30m window."
}What the leaf hashes
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Its day has not closed yet. A day closes ten minutes after midnight UTC; the proof appears here then.