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Delx Commerce — Basis Annualize
x402
Delx Commerce — Basis Annualize is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).
Calculates the annualized basis (APR) between a spot price and a futures/mark price over a given number of days
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.
Output
Returns a JSON object with the raw basis ratio (e.g. 0.01 meaning 1% premium) and the annualized basis APR (basis_apr, e.g. 0.1217 meaning ~12.2% annualized yield), along with a schema identifier string.
Example use cases
Cash-and-carry yield comparison
“ETH spot is $3,400 and the monthly futures contract is at $3,460 with 28 days left — can you annualize that basis so I can see the implied APR and decide if the carry trade is worth it?”
Funding rate arbitrage screening
“I'm looking at a BTC perpetual basis trade: spot is $64,800, the mark price is $65,100, and I'm modeling a 7-day holding period — what's the annualized basis return on that?”
Cross-exchange futures comparison
“On exchange A, SOL spot is $140 and the 60-day futures are at $143.50. Can you annualize that basis into an APR so I can compare it against the 30-day contract on exchange B where spot is $140 and futures are $141.80 with 30 days to expiry?”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/basis-annualize?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, cheap, verifiable computation of annualized basis from raw futures/spot inputs — especially in agent workflows where you want pay-per-result pricing with no API key or subscription required. Prefer this over implementing the formula yourself when auditability or on-chain payment receipts matter, or when running inside an automated trading or monitoring agent that compares basis across multiple instruments.
Side effects
- Missing required fields (days, spot, future) returns a 400 error
- Spot price of zero or negative value is invalid and will be rejected
- Negative days value or zero days causes division error
- Payment not included or insufficient USDC results in 402 Payment Required response
- Extremely large or small floating point values may produce unexpected precision in basis_apr
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| days | integer | Days to delivery or horizon |
| spot | number | Underlying spot price (>0) |
| future | number | Futures/mark price |
Output
Schema · Response
{
"type": "json",
"example": {
"basis": 0.01,
"schema": "delx/util-basis-annualize/v1",
"basis_apr": 0.1216666666666667
}
}Tags
x402
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