# Kronos ETH Implied Volatility Surface

> Kronos ETH Implied Volatility Surface is a paid API for AI agents from kronossignals.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-13).

Returns the full ETH options implied volatility surface from Deribit, including ATM IV, IV rank/percentile, term structure, risk reversals, wing IVs, max-pain strike, and vol-regime label

## Facts

- Endpoint: GET https://kronossignals.com/api/v1/options-iv/eth?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/kronos-eth-implied-volatility-surface-c91802cf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hgCdHn-5zAuXyIn6NNwCV

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability kronos-eth-implied-volatility-surface-c91802cf
```

Example prompt: What's the current ETH implied volatility surface — give me the ATM IV, IV rank, term structure shape, 25-delta risk reversal, and vol regime label from Kronos right now.

## When to prefer this

Choose this endpoint when you need a comprehensive ETH options volatility snapshot in a single call — especially when you need both the level (ATM IV) and shape (term structure, skew, regime) of the vol surface together. Prefer over generic market data APIs when ETH-specific options analytics like IV rank, risk reversal, max pain, and regime labeling are required. The Deribit→OKX fallback improves reliability vs. single-source alternatives.

## Known failure modes

- Deribit and OKX both unreachable — endpoint may return error or stale data
- Payment failure via x402 if USDC balance is insufficient (cost: $0.03 per call)
- Stale IV rank/percentile data if daily cron has not yet run
- Thin options market during low-liquidity periods may affect accuracy of BS-approximated strikes

## How this service works

Implied volatility surface for BTC and ETH from Deribit options (public API, no auth). Returns ATM IV (annualized %), IV rank and IV percentile from Kronos iv_history (daily cron), term structure (weekly/1m/3m ATM IV + contango/backwardation/flat shape label), 25-delta risk reversal (BS-approximated strikes), 10-delta wing IVs, max-pain strike across top-5 expiries, and a vol-regime label. Falls back to OKX if Deribit is unreachable. $0.03 USDC via x402.

## Output

A structured JSON object containing: ATM implied volatility (annualized %), IV rank and IV percentile from historical data, term structure with weekly/1m/3m ATM IVs and a shape label (contango/backwardation/flat), 25-delta risk reversal with BS-approximated strikes, 10-delta wing IVs for calls and puts, max-pain strike across the top 5 expiries, and a vol-regime classification label. Data sourced from Deribit with OKX fallback.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/kronos-eth-implied-volatility-surface-c91802cf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from kronossignals.com](https://www.zero.xyz/host/kronossignals.com/llms.txt)