Roundhouse

Kronos Crypto Data & Forecasts

Realized volatility for 16 crypto assets (BTC/ETH/SOL/BNB/XRP/DOGE/ADA/AVAX/LINK/DOT/LTC/TRX/BCH/ATOM/NEAR/APT): 7-day, 30-day, and 90-day annualized realized vol using three estimators (close-to-close, Parkinson, Garman-Klass) from Binance daily OHLC closed candles only. Essential for risk management, position sizing, and options pricing. Pay-per-call via x402.

DataLiveeip155:8453Exactvia cdp
https://kronossignals.com/api/v1/volatility/btc
VolatilityRiskCryptoRealized-volatilityStatistical
Calls · 30d
3↓ 8.9%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$96.98
Verified settled volume
A floor: summed over 5,000 of 5,756 verified settlements.
$0.020
Listed price
As published in the catalog. Always read the live 402 before paying.
4
Calls · 30d
Upstream's own call count for this endpoint, not ours.
4
Unique payers · 30d
Last called 2026-09-24 03:17Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x36038e1d712c5e39f35952164ec58ec2b96caee7

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x36038e1d712c5e39f35952164ec58ec2b96caee7",
      "amount": "20000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://kronossignals.com/api/v1/volatility/btc",
    "tags": [
      "volatility",
      "risk",
      "crypto",
      "realized-volatility",
      "statistical",
      "ai-agents",
      "x402"
    ],
    "mimeType": "application/json",
    "description": "Realized volatility for 16 crypto assets (BTC/ETH/SOL/BNB/XRP/DOGE/ADA/AVAX/LINK/DOT/LTC/TRX/BCH/ATOM/NEAR/APT): 7-day, 30-day, and 90-day annualized realized vol using three estimators (close-to-close, Parkinson, Garman-Klass) from Binance daily OHLC closed candles only. Essential for risk management, position sizing, and options pricing. Pay-per-call via x402.",
    "serviceName": "Kronos Crypto Data & Forecasts"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "pathParams": {},
          "queryParams": {}
        },
        "output": {
          "type": "json",
          "example": {
            "note": "All estimates are annualized realized volatility using closed daily candles. Annualized by sqrt(252) trading-day convention.",
            "as_of": "2026-01-01T00:00:00.000Z",
            "asset": "BTC-USD",
            "source": "Binance daily klines (closed candles only)",
            "symbol": "BTCUSDT",
            "disclaimer": "Realized volatility from Binance daily OHLC. Historical; not a forecast. Not financial advice.",
            "term_structure": [
              {
                "note": "annualized realized volatility",
                "window": "7d",
                "n_candles": 7,
                "parkinson": 0.48,
                "percentile": 0.72,
                "vol_regime": "elevated",
                "garman_klass": 0.51,
                "best_estimator": "parkinson",
                "close_to_close": 0.54
              },
              {
                "note": "annualized realized volatility",
                "window": "30d",
                "n_candles": 30,
                "parkinson": 0.58,
                "percentile": 0.81,
                "vol_regime": "elevated",
                "garman_klass": 0.61,
                "best_estimator": "garman_klass",
                "close_to_close": 0.62
              }
            ],
            "vol_7d_annualized": 0.54,
            "percentile_context": [
              {
                "max": 1.05,
                "min": 0.22,
                "estimator": "parkinson",
                "percentile": 0.72,
                "vol_window": "7d",
                "current_vol": 0.48,
                "sample_count": 87,
                "is_window_low": false,
                "is_window_high": false
              },
              {
                "max": 0.98,
                "min": 0.28,
                "estimator": "parkinson",
                "percentile": 0.81,
                "vol_window": "30d",
                "current_vol": 0.58,
                "sample_count": 87,
                "is_window_low": false,
                "is_window_high": true
              }
            ],
            "vol_30d_annualized": 0.62
          },
          "example_kind": "illustrative_schema_only",
          "example_note": "Placeholder values and timestamps, not market data."
        }
      },
      "schema": {
        "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"
              }
            }
          }
        }
      },
      "routeTemplate": ":var1"
    }
  },
  "x402Version": 2
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.02USDC≈ $0.02 USD
on Base · exact scheme

Pay 0.02 USDC on Base to 0x3603…caee7. The signed payment is good for 5 minutes.

Paid to
0x3603…caee7
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
20000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x36038e1d712c5e39f35952164ec58ec2b96caee7",
    "amount": "20000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "pathParams": {},
        "queryParams": {}
      },
      "output": {
        "type": "json",
        "example": {
          "note": "All estimates are annualized realized volatility using closed daily candles. Annualized by sqrt(252) trading-day convention.",
          "as_of": "2026-01-01T00:00:00.000Z",
          "asset": "BTC-USD",
          "source": "Binance daily klines (closed candles only)",
          "symbol": "BTCUSDT",
          "disclaimer": "Realized volatility from Binance daily OHLC. Historical; not a forecast. Not financial advice.",
          "term_structure": [
            {
              "note": "annualized realized volatility",
              "window": "7d",
              "n_candles": 7,
              "parkinson": 0.48,
              "percentile": 0.72,
              "vol_regime": "elevated",
              "garman_klass": 0.51,
              "best_estimator": "parkinson",
              "close_to_close": 0.54
            },
            {
              "note": "annualized realized volatility",
              "window": "30d",
              "n_candles": 30,
              "parkinson": 0.58,
              "percentile": 0.81,
              "vol_regime": "elevated",
              "garman_klass": 0.61,
              "best_estimator": "garman_klass",
              "close_to_close": 0.62
            }
          ],
          "vol_7d_annualized": 0.54,
          "percentile_context": [
            {
              "max": 1.05,
              "min": 0.22,
              "estimator": "parkinson",
              "percentile": 0.72,
              "vol_window": "7d",
              "current_vol": 0.48,
              "sample_count": 87,
              "is_window_low": false,
              "is_window_high": false
            },
            {
              "max": 0.98,
              "min": 0.28,
              "estimator": "parkinson",
              "percentile": 0.81,
              "vol_window": "30d",
              "current_vol": 0.58,
              "sample_count": 87,
              "is_window_low": false,
              "is_window_high": true
            }
          ],
          "vol_30d_annualized": 0.62
        },
        "example_kind": "illustrative_schema_only",
        "example_note": "Placeholder values and timestamps, not market data."
      }
    },
    "schema": {
      "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"
            }
          }
        }
      }
    },
    "routeTemplate": ":var1"
  }
}

Provenance

Seen in the source catalog
2026-09-24 03:17Z
Last indexed by Roundhouse
2026-09-24 10:00Z
Last enriched (probe, favicon, geo)
2026-09-14 01:15Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 402
Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service Kronos Crypto Data & Forecasts and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Kronos%20Crypto%20Data%20%26%20Forecasts'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://kronossignals.com/api/v1/volatility/btc, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.