# Deribit Options Volatility Skew

> Deribit Options Volatility Skew is a paid API for AI agents from api.chainmarket-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-24).

Returns the implied volatility skew for BTC or ETH options on Deribit for a given expiry, including ATM IV, put/call wing IVs and strikes, and skew in IV points.

## Facts

- Endpoint: GET https://api.chainmarket-api.workers.dev/api/crypto/deribit-options-skew?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/deribit-options-volatility-skew-46f0ded4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jhbMJWbzylZM76puuAfKq

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 deribit-options-volatility-skew-46f0ded4
```

Example prompt: What's the current implied volatility skew for BTC options on Deribit at the 30OCT26 expiry — give me the ATM IV, the put and call wing IVs, and the skew in IV points.

## When to prefer this

Use this endpoint when you need live Deribit-sourced options volatility skew data for BTC or ETH without managing API keys or authentication. It is ideal for agents performing crypto derivatives analysis, sentiment gauging via put/call skew, or vol surface monitoring. Prefer it over building direct Deribit API integrations when you want a pay-per-call model with no signup friction.

## Known failure modes

- Invalid currency value (not BTC or ETH) — returns an error
- Expiry string not in Deribit format (e.g. missing month abbreviation) — returns error or defaults to nearest
- No options instruments found for the requested expiry — empty or error response
- Deribit API upstream unavailable — propagated error or timeout
- Payment failure — call is not charged if it fails

## How this service works

Deribit BTC or ETH options for one expiry (default: nearest unexpired): at-the-money implied volatility (mark IV), and an IV skew at ±10% moneyness (put at 0.9x spot minus call at 1.1x spot, in IV points). This is a moneyness skew, not a 25-delta skew: Deribit's summary has no delta, so per-strike delta calls are not made.

## Output

Returns a JSON object with the expiry label and date, currency, source URL, ATM implied volatility percentage, put wing (IV% and strike), call wing (IV% and strike), skew in IV points (put wing IV minus call wing IV), current underlying spot price, number of instruments in that expiry, and a timestamp of when the data was fetched.

## 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"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "expiry": {
       "type": "string",
       "description": "Expiry as Deribit writes it, e.g. 30OCT26 (optional; default nearest)"
      },
      "currency": {
       "type": "string",
       "description": "BTC or ETH (default BTC)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "expiry": "30OCT26",
  "source": "https://www.deribit.com/api/v2/public/get_book_summary_by_currency?currency=BTC&kind=option",
  "putWing": {
   "ivPct": 44.89,
   "strike": 73000
  },
  "atmIvPct": 31.2,
  "callWing": {
   "ivPct": 37.46,
   "strike": 90000
  },
  "currency": "BTC",
  "checkedAt": "2026-10-23T09:35:56.668Z",
  "expiryDate": "2026-10-30",
  "skewIvPoints": 7.43,
  "underlyingPrice": 81630.19,
  "instrumentsInExpiry": 112
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/deribit-options-volatility-skew-46f0ded4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.chainmarket-api.workers.dev](https://www.zero.xyz/host/api.chainmarket-api.workers.dev/llms.txt)