the402 endpoint detail

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cryptopulse.theaslangroupllc.com api volatility-check

https://cryptopulse.theaslangroupllc.com/api/volatility-check

answers 402, partial

Volatility check for a perp market, deterministic. Answers "how volatile is this coin right now", "is the range compressing or expanding". Computed in code from Hyperliquid candles: annualized realized volatility (log-return stdev), NATR (Wilder ATR-14 / price), Bollinger(20,2) width percent and percent-B, window high/low and distance from each, over a chosen interval (15m|1h|4h|1d) and lookback.

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse. It advertises 14 ways to pay and only 13 of them are usable.
Price
$0.02
Network
base
Pay to
0x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
GET
Response latency
154 ms
Payment options
13 usable of 14
Last checked
2026-08-15T14:32:03.185Z (1h ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fcryptopulse.theaslangroupllc.com%2Fapi%2Fvolatility-check"