the402 endpoint detail

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data.greeneris.io vol dvol

https://data.greeneris.io/v1/vol/dvol

answers 402

Deribit DVOL index (30-day annualized implied volatility from the options order book) for BTC or ETH, delivered as a risk signal: current level, 24h change, and min/max/percentile over a lookback window. Query: ?asset=BTC|ETH&window=7d|30d|90d (defaults BTC, 30d). JSON, 5min cache. Derived from Deribit public volatility-index candles.

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
0x6ab8efe305cce67daa48c97bde29c04402822dff
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
GET
Response latency
94 ms
Payment options
1 usable of 1
Last checked
2026-08-15T14:25:22.701Z (1h ago)
Category
search

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fdata.greeneris.io%2Fv1%2Fvol%2Fdvol"