# BTC/ETH Implied Volatility Index

> BTC/ETH Implied Volatility Index is a paid API for AI agents from crypto-asistent.com, paid per call via x402, $0.04/call, status unknown (last checked 2026-10-13).

Returns the 30-day implied volatility index for BTC and ETH, including its percentile rank over the past month and expected price move over 1, 7, and 30 days.

## Facts

- Endpoint: POST https://crypto-asistent.com/api/x402/data/implied-volatility?utm_source=zero.xyz
- Price: $0.04/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/btc-eth-implied-volatility-index-c81536fa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ouEQbiQeKNBRwfpusaWSG

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 btc-eth-implied-volatility-index-c81536fa -d '<json body>'
```

Example prompt: What is the current implied volatility for BTC and ETH — show me the IV index, where it sits relative to the past month as a percentile, and how much price movement is expected over the next 1, 7, and 30 days?

## When to prefer this

Choose this endpoint when you need options-market-derived volatility data rather than realized or historical volatility — specifically when assessing whether hedging is cheap or expensive, sizing positions relative to expected moves, or understanding market sentiment beyond what funding rates reveal. Prefer this over funding-rate endpoints when the question is about expected magnitude of price movement rather than directional crowding.

## Known failure modes

- Missing or malformed request body returns an error
- Options market data temporarily unavailable for one or both assets
- Stale data if underlying exchange feeds are delayed
- Rate limiting or payment failure via x402 protocol

## How this service works

What the options market expects price to do, not what leverage is doing: the 30-day implied volatility index for BTC and ETH, with its percentile over the last month and the expected move in percent over 1, 7 and 30 days. Funding tells you who is crowded; this tells you how much movement is already priced in — and whether hedging is cheap or expensive relative to where it has been.

## Output

Returns the 30-day implied volatility index for BTC and ETH, a percentile rank of that IV level over the prior month (indicating whether volatility is historically cheap or expensive), and the expected percentage price move over 1-day, 7-day, and 30-day horizons derived from the options market.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "required": [],
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object"
    }
   },
   "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/btc-eth-implied-volatility-index-c81536fa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from crypto-asistent.com](https://www.zero.xyz/host/crypto-asistent.com/llms.txt)