the402 endpoint detail

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api.usenami.io perp oracle-families

https://api.usenami.io/v1/perp/oracle-families

payable

Oracle price-source family classification across 35 tracked crypto perp venues — which venues derive their index price from the same upstream feed. Basis-risk awareness for cross-venue and funding-arb strategies: two venues sharing an oracle family will not diverge independently, so a spread between them is not the hedge it looks like.

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.001
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
2026-08-10T09:13:03.109Z (1d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.usenami.io%2Fv1%2Fperp%2Foracle-families"