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GET /v1/basis

Annualised basis for an expiry

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10 free calls per day — no sign-up, no API key. Goes through the oanor gateway.

Custom headers (optional)
api.oanor.com/futurescurve-api

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Code snippets

curl "https://api.oanor.com/futurescurve-api/v1/basis" \
  -H "x-oanor-key: oanor_test_..."
await fetch("https://api.oanor.com/futurescurve-api/v1/basis", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
$ch = curl_init("https://api.oanor.com/futurescurve-api/v1/basis");
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$out = curl_exec($ch);
import requests
requests.get(
    "https://api.oanor.com/futurescurve-api/v1/basis",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

A real response from this endpoint, captured by the latest health check.

{
    "data": {
        "mark": 63334.61,
        "expiry": "26JUN26",
        "source": "Deribit",
        "currency": "BTC",
        "basis_abs": 48.18,
        "basis_pct": 0.0761,
        "spot_index": 63286.43,
        "days_to_expiry": 14.26,
        "annualized_basis_pct": 1.95
    },
    "meta": {
        "timestamp": "2026-06-12T01:41:10.552Z",
        "request_id": "77fea771-ddc2-424f-be17-9d24ee36534c"
    },
    "status": "ok",
    "message": "Basis retrieved successfully",
    "success": true
}