the402 endpoint detail

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graphadvocate.com uniswap basis

https://graphadvocate.com/uniswap/basis

answers 402

Cross-venue SPOT vs PERP basis. POST {coin, chain?}. Joins Uniswap spot (on-chain, from the subgraph) against the Hyperliquid perp last-fill price and returns basis_pct + a signal (perp_premium / perp_discount / aligned). A JOIN a single-venue passthrough structurally cannot return. Positive basis means longs are crowded and typically paying funding.

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.05
Network
base
Pay to
0x0FF5A6ecef783BBA35463ec2F8403B9B5e9e7C86
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
86 ms
Payment options
1 usable of 1
Last checked
2026-08-15T14:30:55.072Z (1h ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fgraphadvocate.com%2Funiswap%2Fbasis"