the402 endpoint detail

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kronossignals.com cex-premium btc

https://kronossignals.com/api/v1/cex-premium/btc

answers 402

Coinbase price premium vs composite spot median (OKX + Kraken + Binance). premium_pct = (coinbase / composite_median − 1) × 100. Positive = US/institutional demand skew; negative = global selling pressure. Covers BTC/ETH/SOL/XRP/DOGE/ADA/AVAX/LINK/DOT/LTC/BCH/ATOM/NEAR (assets listed on Coinbase). Point-in-time only — no historical baseline stored. $0.02 USDC per call via x402.

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.02
Network
base
Pay to
0x36038e1d712c5e39f35952164ec58ec2b96caee7
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
GET
Response latency
197 ms
Payment options
1 usable of 1
Last checked
2026-08-15T14:22:10.579Z (2d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fkronossignals.com%2Fapi%2Fv1%2Fcex-premium%2Fbtc"