← The evidence ledger
Evidence row 73407
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://derivs.duoleads.com/v1/basis
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- e7b4177142eb5dfb1fe8b855240016376aa41bad3c580d1ac8b3d756d92accfb
- Leaf
- 0xfbed95b86ca0973057df646a5c9c1d8b421cc2e2d43b706f160f9e5a9f44728a
What was observed
{
"endpoints": [
[
"x402",
"https://derivs.duoleads.com/v1/basis"
]
],
"name": "Futures Basis and Perp Premium",
"owner_address": "0xcd673f7e1dad254347aeab6be0defe8b9c6b3a39",
"raw": {
"accepts": [
{
"amount": "3000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:8453",
"payTo": "0xCD673f7e1daD254347AEab6be0DEFe8b9C6b3A39",
"scheme": "exact"
}
],
"description": "Futures basis and term structure of one coin: dated futures on Bybit, Deribit, Kraken, Gate and OKX with days to expiry, basis vs index and annualised basis (contango or backwardation, the carry), the perp premium (mark vs index/oracle) on Hyperliquid, dYdX, Bitfinex and the others, and predicted funding. Crypto futures basis for BTC, ETH and more. Data only. Bad input is free; under 2 venues not charged.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"coin": "BTC"
},
"type": "http"
},
"output": {
"example": {
"as_of": "2026-10-14T23:00:00Z",
"coin": "BTC",
"colo": null,
"disclaimer": "Data only, not investment advice, not a benchmark; not affiliated with any exchange",
"futures": [
{
"annualised_basis_pct": null,
"as_of": "2026-10-14T23:00:00Z",
"basis_pct": -0.000711102,
"days_to_expiry": 0.375,
"expiry": "2026-10-15T08:00:00Z",
"index": 81563.54,
"mark": 81562.96,
"oi_usd": 1362060,
"quote": "USD",
"stale": false,
"symbol": "BTC-15OCT26",
"venue": "deribit",
"volume_24h_usd": 1294160
},
{
"annualised_basis_pct": -36.2158,
"as_of": "2026-10-14T23:00:00Z",
"basis_pct": -0.136429,
"days_to_expiry": 1.375,
"expiry": "2026-10-16T08:00:00Z",
"index": 81654,
"mark": 81542.6,
"oi_usd": 6074760.61,
"quote": "USDT",
"stale": false,
"symbol": "BTCUSDT-16OCT26",
"venue": "bybit",
"volume_24h_usd": 146515.9953
},
{
"annualised_basis_pct": 6.13813,
"as_of": "2026-10-14T23:00:00Z",
"basis_pct": 0.0231231,
"days_to_expiry": 1.375,
"expiry": "2026-10-16T08:00:00Z",
"index": 81563.54,
"mark": 81582.4,
"oi_usd": 8947950,
"quote": "USD",
"stale": false,
"symbol": "BTC-16OCT26",
"venue": "deribit",
"volume_24h_usd": 2927380
}
],
"perp_premium": [
{
"as_of": "2026-10-14T23:00:00Z",
"funding_rate_8h": 0.00003501,
"index": 81672.62,
"mark": 81631.8,
"premium_pct": -0.04998,
"stale": false,
"symbol": "BTCUSDT",
"venue": "bybit"
},
{
"as_of": "2026-10-14T23:00:00Z",
"funding_rate_8h": 0.0001,
"index": 81658,
"mark": 81624,
"premium_pct": -0.0416371,
"stale": false,
"symbol": "BTC",
"venue": "hyperliquid"
}
],
"predicted_funding": {
"as_of": "2026-10-14T23:00:00Z",
"rows": [
{
"apr_pct": -5.17826,
"interval_h": 8,
"next_funding_time": "2026-10-15T00:00:00Z",
"rate": -0.00004729,
"rate_8h": -0.00004729,
"source": "binance"
},
{
"apr_pct": 3.83359,
"interval_h": 8,
"next_funding_time": "2026-10-15T00:00:00Z",
"rate": 0.00003501,
"rate_8h": 0.00003501,
"source": "bybit"
},
{
"apr_pct": 10.95,
"interval_h": 1,
"next_funding_time": "2026-10-15T00:00:00Z",
"rate": 0.0000125,
"rate_8h": 0.0001,
"source": "hyperliquid"
}
]
},
"request_id": "01KEXAMPLE0000000000000000",
"see_also": {
"endpoint": "https://derivs.duoleads.com/v1/funding-rates",
"params": [
"coin"
],
"reason": "Compare the futures basis with perpetual funding on every venue."
},
"term_structure": [
{
"avg_annualised_basis_pct": null,
"days_to_expiry": 0.375,
"expiry_date": "2026-10-15",
"venues": [
"deribit"
]
},
{
"avg_annualised_basis_pct": -7.39756,
"days_to_expiry": 1.375,
"expiry_date": "2026-10-16",
"venues": [
"bybit",
"deribit",
"gate"
]
}
],
"units": {
"annualised_basis_pct": "basis_pct * 365 / days_to_expiry (simple); null when the future expires in less than 1 day (and left out of the term-structure average)",
"basis_pct": "(future - index) / index * 100",
"days_to_expiry": "days (fractional)",
"index": "USD per coin (the venue's index; oracle on Hyperliquid and dYdX)",
"mark": "USD per coin",
"premium_pct": "(perp mark - index) / index * 100",
"times": "ISO 8601 UTC"
},
"venues_missing": [
{
"reason": "not_listed",
"venue": "dydx"
}
]
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"coin": {
"description": "Coin symbol: BTC, ETH, SOL ... (also BTCUSDT, BTC-PERP, XBT).",
"maxLength": 32,
"minLength": 1,
"type": "string"
}
},
"required": [
"coin"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1792027337/bazaar-icons/721db30f7c7d72f7.png",
"lastUpdated": "2026-10-24T15:08:39.726Z",
"quality": {
"l30DaysTotalCalls": 3,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-24T15:08:39.521Z"
},
"resource": "https://derivs.duoleads.com/v1/basis",
"serviceName": "Futures Basis and Perp Premium",
"tags": [
"futures-basis",
"basis",
"perp-basis",
"term-structure",
"futures"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Futures basis and term structure of one coin: dated futures on Bybit, Deribit, Kraken, Gate and OKX with days to expiry, basis vs index and annualised basis (contango or backwardation, the carry), the perp premium (mark vs index/oracle) on Hyperliquid, dYdX, Bitfinex and the others, and predicted funding. Crypto futures basis for BTC, ETH and more. Data only. Bad input is free; under 2 venues not charged."
}What the leaf hashes
{"body":"e7b4177142eb5dfb1fe8b855240016376aa41bad3c580d1ac8b3d756d92accfb","id":73407,"kind":"listing","method":"baseline/1","observed_us":1793025487590049,"prev":null,"subject":"x402_bazaar:https://derivs.duoleads.com/v1/basis","subject_kind":"source_record"}Proof
Its day has not closed yet. A day closes ten minutes after midnight UTC; the proof appears here then.