FETCH402
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Resource / 220

healthy

Kronos Crypto Data & Forecasts.

GET https://kronossignals.com/api/v1/options-iv/btc ↗

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.

Eligibility
probeable
Failures
0
Last quote
2026-08-12 22:00:01 UTC
Last probe
2026-08-12 22:00:01 UTC
Payment requirements / accepts[] 1 options
State Network Scheme Atomic amount Asset payTo / untrusted
active eip155:8453 exact 30000 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 0x36038e1d712c5e39f35952164ec58ec2b96caee7

All advertised payment options are stored. Base (`eip155:8453`) is the operational network for ranking and canaries; non-Base options remain visible for transparency.

Probe evidence 1 recent
healthy 2026-08-12 22:00:01 UTC GET · HTTP 402 · 101ms · accepts 1 · base 1 ok
Request
GET https://kronossignals.com/api/v1/options-iv/btc
Robots
error
Note
robots_error:{:robots_http_status, 404};http_402;accepts=1;base=1
Accepts fingerprint
b0f91b543b643944c48fd102240f989d3460d4684fa32816a93f7cf46e484c08

Accepts snapshot

[
  {
    "amount": "30000",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "assetTransferMethod": null,
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "maxTimeoutSeconds": 300,
    "network": "eip155:8453",
    "payTo": "0x36038e1d712c5e39f35952164ec58ec2b96caee7",
    "paymentFlow": null,
    "raw": {
      "amount": "30000",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "max_timeout_seconds": 300,
      "network": "eip155:8453",
      "payTo": "0x36038e1d712c5e39f35952164ec58ec2b96caee7",
      "pay_to": "0x36038e1d712c5e39f35952164ec58ec2b96caee7",
      "scheme": "exact"
    },
    "scheme": "exact"
  }
]

PaymentRequired raw 

{
  "accepts": [
    {
      "amount": "30000",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "network": "eip155:8453",
      "payTo": "0x36038e1d712c5e39f35952164ec58ec2b96caee7",
      "scheme": "exact"
    }
  ],
  "error": "Payment required",
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "method": "GET",
          "pathParams": {},
          "queryParams": {},
          "type": "http"
        },
        "output": {
          "example": {
            "as_of": "2026-07-02T10:00:00.000Z",
            "asset": "BTC-USD",
            "atm_iv": 42.8,
            "available": true,
            "data_source": "deribit",
            "disclaimer": "Options data from Deribit public API. Informational only.",
            "iv_history_days": 45,
            "iv_percentile": 61.2,
            "iv_rank": 58.3,
            "iv_rank_note": "Based on 45 trading days of ATM IV history.",
            "max_pain_strike": 60000,
            "skew_25d": 3.8,
            "skew_note": "25-delta risk reversal: put IV minus call IV at BS-approximated 25-delta strikes.",
            "term_structure": [
              {
                "atm_iv": 44.2,
                "days_to_expiry": 3,
                "expiry": "5JUL26",
                "label": "weekly"
              },
              {
                "atm_iv": 42.5,
                "days_to_expiry": 29,
                "expiry": "31JUL26",
                "label": "1m"
              },
              {
                "atm_iv": 40.1,
                "days_to_expiry": 85,
                "expiry": "25SEP26",
                "label": "3m"
              }
            ],
            "term_structure_shape": "contango",
            "underlying_price": 61200,
            "vol_regime": "normal",
            "vol_regime_note": "ATM IV 42.8%, term structure contango.",
            "wing_10d_call_iv": 38.5,
            "wing_10d_put_iv": 49.2
          },
          "type": "json"
        }
      },
      "routeTemplate": ":var1",
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "pathParams": {
                "type": "object"
              },
              "queryParams": {
                "properties": {},
                "type": "object"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "resource": {
    "description": "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.",
    "mimeType": "application/json",
    "serviceName": "Kronos Crypto Data & Forecasts",
    "tags": [
      "options",
      "implied-volatility",
      "iv",
      "iv-rank",
      "iv-percentile",
      "greeks",
      "skew",
      "risk-reversal",
      "derivatives",
      "crypto",
      "btc",
      "eth",
      "deribit",
      "term-structure",
      "vol-regime",
      "ai-agents",
      "x402"
    ],
    "url": "https://kronossignals.com/api/v1/options-iv/btc"
  },
  "x402Version": 2
}

Response headers

{
  "age": "0",
  "cache-control": "public, max-age=0, must-revalidate",
  "content-type": "application/json",
  "date": "Wed, 12 Aug 2026 22:00:01 GMT",
  "payment-required": "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",
  "server": "Vercel",
  "strict-transport-security": "max-age=63072000",
  "transfer-encoding": "chunked",
  "x-matched-path": "/api/v1/options-iv/[asset]",
  "x-vercel-cache": "MISS",
  "x-vercel-id": "iad1::iad1::k5gmk-1786572001755-cbfdcc069ba2"
}

Response body 

{
  "accepts": [
    {
      "amount": "30000",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "network": "eip155:8453",
      "payTo": "0x36038e1d712c5e39f35952164ec58ec2b96caee7",
      "scheme": "exact"
    }
  ],
  "error": "Payment required",
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "method": "GET",
          "pathParams": {},
          "queryParams": {},
          "type": "http"
        },
        "output": {
          "example": {
            "as_of": "2026-07-02T10:00:00.000Z",
            "asset": "BTC-USD",
            "atm_iv": 42.8,
            "available": true,
            "data_source": "deribit",
            "disclaimer": "Options data from Deribit public API. Informational only.",
            "iv_history_days": 45,
            "iv_percentile": 61.2,
            "iv_rank": 58.3,
            "iv_rank_note": "Based on 45 trading days of ATM IV history.",
            "max_pain_strike": 60000,
            "skew_25d": 3.8,
            "skew_note": "25-delta risk reversal: put IV minus call IV at BS-approximated 25-delta strikes.",
            "term_structure": [
              {
                "atm_iv": 44.2,
                "days_to_expiry": 3,
                "expiry": "5JUL26",
                "label": "weekly"
              },
              {
                "atm_iv": 42.5,
                "days_to_expiry": 29,
                "expiry": "31JUL26",
                "label": "1m"
              },
              {
                "atm_iv": 40.1,
                "days_to_expiry": 85,
                "expiry": "25SEP26",
                "label": "3m"
              }
            ],
            "term_structure_shape": "contango",
            "underlying_price": 61200,
            "vol_regime": "normal",
            "vol_regime_note": "ATM IV 42.8%, term structure contango.",
            "wing_10d_call_iv": 38.5,
            "wing_10d_put_iv": 49.2
          },
          "type": "json"
        }
      },
      "routeTemplate": ":var1",
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "pathParams": {
                "type": "object"
              },
              "queryParams": {
                "properties": {},
                "type": "object"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "resource": {
    "description": "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.",
    "mimeType": "application/json",
    "serviceName": "Kronos Crypto Data & Forecasts",
    "tags": [
      "options",
      "implied-volatility",
      "iv",
      "iv-rank",
      "iv-percentile",
      "greeks",
      "skew",
      "risk-reversal",
      "derivatives",
      "crypto",
      "btc",
      "eth",
      "deribit",
      "term-structure",
      "vol-regime",
      "ai-agents",
      "x402"
    ],
    "url": "https://kronossignals.com/api/v1/options-iv/btc"
  },
  "x402Version": 2
}

Request headers

{
  "accept": "*/*",
  "user-agent": "Fetch402Bot/0.1 (+https://fetch402.com/crawler; contact: crawler@fetch402.com)"
}

Machine contract

Schemas.

InputJSON
{
  "method": "GET",
  "pathParams": {},
  "queryParams": {},
  "type": "http"
}
OutputJSON
{
  "example": {
    "as_of": "2026-07-02T10:00:00.000Z",
    "asset": "BTC-USD",
    "atm_iv": 42.8,
    "available": true,
    "data_source": "deribit",
    "disclaimer": "Options data from Deribit public API. Informational only.",
    "iv_history_days": 45,
    "iv_percentile": 61.2,
    "iv_rank": 58.3,
    "iv_rank_note": "Based on 45 trading days of ATM IV history.",
    "max_pain_strike": 60000,
    "skew_25d": 3.8,
    "skew_note": "25-delta risk reversal: put IV minus call IV at BS-approximated 25-delta strikes.",
    "term_structure": [
      {
        "atm_iv": 44.2,
        "days_to_expiry": 3,
        "expiry": "5JUL26",
        "label": "weekly"
      },
      {
        "atm_iv": 42.5,
        "days_to_expiry": 29,
        "expiry": "31JUL26",
        "label": "1m"
      },
      {
        "atm_iv": 40.1,
        "days_to_expiry": 85,
        "expiry": "25SEP26",
        "label": "3m"
      }
    ],
    "term_structure_shape": "contango",
    "underlying_price": 61200,
    "vol_regime": "normal",
    "vol_regime_note": "ATM IV 42.8%, term structure contango.",
    "wing_10d_call_iv": 38.5,
    "wing_10d_put_iv": 49.2
  },
  "type": "json"
}