Implied Prob Btc

{
  "as_of": "2026-01-01T14:42:00.000Z",
  "asset": "BTC-USD",
  "available": true,
  "disclaimer": "Options-market data, informational only. Not a forecast and not financial advice.",
  "expiries_used": [
    {
      "expires_at": "2026-01-02T08:00:00.000Z",
      "expiry": "2JAN26",
      "weight": 1
    }
  ],
  "forward_at_target": 60214.8,
  "hours_to_target": 17.3,
  "index_price": 60210.5,
  "ladder": [
    {
      "extrapolated": false,
      "iv_at_strike_pct": 47.1,
      "probability_above": 0.7412,
      "probability_below": 0.2588,
      "strike": 59000
    },
    {
      "extrapolated": false,
      "iv_at_strike_pct": 44.8,
      "probability_above": 0.5301,
      "probability_below": 0.4699,
      "strike": 60000
    },
    {
      "extrapolated": false,
      "iv_at_strike_pct": 43.9,
      "probability_above": 0.3122,
      "probability_below": 0.6878,
      "strike": 61000
    }
  ],
  "source": "deribit",
  "target_time": "2026-01-02T08:00:00.000Z"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://kronossignals.com/api/v1/implied-prob/btc'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://kronossignals.com/api/v1/implied-prob/btc' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fkronossignals.com%2Fapi%2Fv1%2Fimplied-prob%2Fbtc
const res = await pay("https://kronossignals.com/api/v1/implied-prob/btc");
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://kronossignals.com/api/v1/implied-prob/btc")
    print(res.status_code, res.text)