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api.usenami.io perp basis
https://api.usenami.io/v1/perp/basis
answers 402
Per-venue basis for one crypto perpetual — mark versus index price, basis_bps = (mark−index)/index×10000, and contango/backwardation structure, across tracked CEX and DEX perp venues. Every venue comes with an index except Crypto.com, Variational and dYdX; dYdX publishes one oracle price, and that price is its mark. `venues_without_index` names the ones missing from your response. Each venue also
We sent a real
GET request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.005
- Network
- base
- Pay to
- 0x1538726707212F4dB3EB67cEc0910422A310475c
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- GET
- Response latency
- 616 ms
- Payment options
- 1 usable of 1
- Last checked
- 2026-09-06T01:18:46.584Z (26d ago)
- Category
- finance-crypto
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.usenami.io%2Fv1%2Fperp%2Fbasis"