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x402stock Basis Data
x402
x402stock Basis Data is a paid API for AI agents from agents.x402stock.xyz, paid per call via x402 or MPP, $0.05/call, status unknown (last checked 2026-10-02).
Returns basis (spot-futures spread) data for financial instruments via pay-per-request USDC micropayment
Price / call$0.05
Success—
StatusUnknown
How this service works
Scans every US stock that also trades as a 24/7 synthetic perp and returns the gap: official (delayed) price, prev close, perp mark and oracle, funding APR, open interest, and computed `basis_percent` + `basis_vs_prev_close_percent` — the implied overnight move while the US market is shut. Widest dislocation first, plus a plain-English `reading`. `?limit=`, `?min_basis=`. From x402stock
Output
Returns basis data representing the spread between spot and futures (or perpetual) prices for the requested instrument, including spot price, futures/perp price, computed basis value, and timestamp. Enables analysis of contango, backwardation, and cash-and-carry opportunities.
Example use cases
Crypto basis arbitrage screening
“Check the current basis between Bitcoin spot and futures so I can evaluate whether a cash-and-carry trade makes sense today.”
Contango vs backwardation monitoring
“Is crude oil futures in contango or backwardation right now? Give me the basis spread between spot and the front-month contract.”
Perp funding implied basis check
“What's the implied basis on Ethereum perps on Hyperliquid right now — I want to compare it against the spot price to see if there's a funding arbitrage.”
Technical details
Endpoint
GEThttps://agents.x402stock.xyz/api/v1/basis?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need basis (spot-futures spread) data for arbitrage analysis, carry trade evaluation, or monitoring contango/backwardation across crypto, commodities, or other markets. Prefer over generic price endpoints when the relationship between spot and futures is the key quantity. Requires no API key — just pay $0.05 USDC per call via x402.
Side effects
- Invalid or unsupported instrument symbol returns 400 or empty result
- Payment not received or insufficient USDC balance causes 402 Payment Required
- Rate limiting or upstream data unavailability returns 503
- Malformed properties parameter causes schema validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| noterequired | — | |
| rowsrequired | array | |
| as_ofrequired | string | |
| countrequired | number | |
| methodrequired | string | |
| sourcerequired | string | |
| readingrequired | string | |
| sectionsrequired | object | |
| venue_maprequired | object | |
| us_market_openrequired | boolean | |
| total_availablerequired | number |
Tags
x402
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