Futures Basis & Perp Premium

x402

Futures Basis & Perp Premium is a paid API for AI agents from derivs.duoleads.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-15).

Returns futures basis and perpetual premium data for a given crypto coin across 8 derivatives exchanges, including mark prices, index prices, days to expiry, and annualised basis percentages.

Price / call$0.003

Seller volume →—

Success—

StatusUnknown

How this service works

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.

Output

A JSON object containing: a list of dated futures contracts with mark price, index price, basis_pct, annualised_basis_pct, days_to_expiry, open interest in USD, 24h volume, venue, symbol, and expiry; a list of perp markets with mark price, index price, premium_pct, and 8h funding rate per venue; metadata fields including coin, as_of timestamp, unit definitions, a disclaimer, and a see_also pointer to the funding-rates endpoint.

Example use cases

Cash-and-carry arbitrage check

“Is there a meaningful cash-and-carry opportunity in BTC futures right now? Show me the annualised basis across Deribit, Bybit, and OKX so I can see which contract is most attractive.”

ETH term structure analysis

“Pull up the full ETH futures term structure for me — I want to see all listed contracts with their basis percentage, annualised basis, and days to expiry across all supported venues.”

Perp premium monitoring for SOL

“What's the current perp premium for SOL on Hyperliquid, Bybit, and dYdX? I want to know how far the perp mark is trading above or below the index right now.”

Technical details

Endpoint

GEThttps://derivs.duoleads.com/v1/basis?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need cross-venue futures basis and perp premium data for a specific coin in a single call, especially for cash-and-carry analysis, term structure comparison, or identifying contango/backwardation across Bybit, Hyperliquid, dYdX, Gate, Kraken, Bitfinex, Deribit, and OKX simultaneously. Prefer this over the funding-rates endpoint when the futures curve and annualised basis are the primary focus rather than funding rates alone.

Side effects

Missing or invalid 'coin' query parameter returns a 400-level error
Unrecognised coin symbol (e.g. a delisted token) may return empty futures and perp_premium arrays
Stale data flagged with stale:true when a venue feed is delayed
Payment not settled (x402 flow incomplete) results in a 402 Payment Required response
Rate-limit or network timeout from upstream exchange may cause partial results

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "coin": "BTC",
    "colo": null,
    "as_of": "2026-10-14T23:00:00Z",
    "units": {
      "mark": "USD per coin",
      "index": "USD per coin (the venue's index; oracle on Hyperliquid and dYdX)",
      "times": "ISO 8601 UTC",
      "basis_pct": "(future - index) / index * 100",
      "premium_pct": "(perp mark - index) / index * 100",
      "days_to_expiry": "days (fractional)",
      "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)"
    },
    "futures": [
      {
        "mark": 81562.96,
        "as_of": "2026-10-14T23:00:00Z",
        "index": 81563.54,
        "quote": "USD",
        "stale": false,
        "venue": "deribit",
        "expiry": "2026-10-15T08:00:00Z",
        "oi_usd": 1362060,
        "symbol": "BTC-15OCT26",
        "basis_pct": -0.000711102,
        "days_to_expiry": 0.375,
        "volume_24h_usd": 1294160,
        "annualised_basis_pct": null
      },
      {
        "mark": 81542.6,
        "as_of": "2026-10-14T23:00:00Z",
        "index": 81654,
        "quote": "USDT",
        "stale": false,
        "venue": "bybit",
        "expiry": "2026-10-16T08:00:00Z",
        "oi_usd": 6074760.61,
        "symbol": "BTCUSDT-16OCT26",
        "basis_pct": -0.136429,
        "days_to_expiry": 1.375,
        "volume_24h_usd": 146515.9953,
        "annualised_basis_pct": -36.2158
      },
      {
        "mark": 81582.4,
        "as_of": "2026-10-14T23:00:00Z",
        "index": 81563.54,
        "quote": "USD",
        "stale": false,
        "venue": "deribit",
        "expiry": "2026-10-16T08:00:00Z",
        "oi_usd": 8947950,
        "symbol": "BTC-16OCT26",
        "basis_pct": 0.0231231,
        "days_to_expiry": 1.375,
        "volume_24h_usd": 2927380,
        "annualised_basis_pct": 6.13813
      }
    ],
    "see_also": {
      "params": [
        "coin"
      ],
      "reason": "Compare the futures basis with perpetual funding on every venue.",
      "endpoint": "https://derivs.duoleads.com/v1/funding-rates"
    },
    "disclaimer": "Data only, not investment advice, not a benchmark; not affiliated with any exchange",
    "request_id": "01KEXAMPLE0000000000000000",
    "perp_premium": [
      {
        "mark": 81631.8,
        "as_of": "2026-10-14T23:00:00Z",
        "index": 81672.62,
        "stale": false,
        "venue": "bybit",
        "symbol": "BTCUSDT",
        "premium_pct": -0.04998,
        "funding_rate_8h": 0.00003501
      },
      {
        "mark": 81624,
        "as_of": "2026-10-14T23:00:00Z",
        "index": 81658,
        "stale": false,
        "venue": "hyperliquid",
        "symbol": "BTC",
        "premium_pct": -0.0416371,
        "funding_rate_8h": 0.0001
      }
    ],
    "term_structure": [
      {
        "venues": [
          "deribit"
        ],
        "expiry_date": "2026-10-15",
        "days_to_expiry": 0.375,
        "avg_annualised_basis_pct": null
      },
      {
        "venues": [
          "bybit",
          "deribit",
          "gate"
        ],
        "expiry_date": "2026-10-16",
        "days_to_expiry": 1.375,
        "avg_annualised_basis_pct": -7.39756
      }
    ],
    "venues_missing": [
      {
        "venue": "dydx",
        "reason": "not_listed"
      }
    ],
    "predicted_funding": {
      "rows": [
        {
          "rate": -0.00004729,
          "source": "binance",
          "apr_pct": -5.17826,
          "rate_8h": -0.00004729,
          "interval_h": 8,
          "next_funding_time": "2026-10-15T00:00:00Z"
        },
        {
          "rate": 0.00003501,
          "source": "bybit",
          "apr_pct": 3.83359,
          "rate_8h": 0.00003501,
          "interval_h": 8,
          "next_funding_time": "2026-10-15T00:00:00Z"
        },
        {
          "rate": 0.0000125,
          "source": "hyperliquid",
          "apr_pct": 10.95,
          "rate_8h": 0.0001,
          "interval_h": 1,
          "next_funding_time": "2026-10-15T00:00:00Z"
        }
      ],
      "as_of": "2026-10-14T23:00:00Z"
    }
  }
}

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