Option Payoff

{
  "asOf": "2026-10-11T20:30:29.728Z",
  "atSpot": {
    "price": 112,
    "profitLoss": 700
  },
  "breakEven": 105,
  "contracts": 1,
  "degraded": false,
  "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
  "maxGain": "unlimited",
  "maxLoss": 500,
  "notChecked": [
    "the value before expiry: time value, volatility and early exercise change the profit and loss",
    "commissions, taxes, assignment and margin requirements for short options",
    "…1 more"
  ],
  "premiumPerShare": 5,
  "premiumTotal": 500,
  "reasons": [
    "Profit and loss at expiry = direction x (intrinsic value - premium) x 100 x contracts.",
    "Table shows profit and loss at expiry prices from 80% to 120% of the strike."
  ],
  "side": "long",
  "source": "computed locally",
  "strike": 100,
  "summary": "long call (strike 100, premium 5, 1 contract): break-even 105, max gain unlimited, max loss 500. At 112 on expiry: 700.",
  "table": [
    {
      "priceAtExpiry": 80,
      "profitLoss": -500
    },
    {
      "priceAtExpiry": 90,
      "profitLoss": -500
    }
  ],
  "type": "call",
  "verdict": "COMPUTED"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://invest-math.x402tookit.com/option-payoff?contracts=1&premium=5&side=long&spot=112&strike=100&type=call'

# 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://invest-math.x402tookit.com/option-payoff?contracts=1&premium=5&side=long&spot=112&strike=100&type=call' \
  | 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%2Finvest-math.x402tookit.com%2Foption-payoff
const res = await pay("https://invest-math.x402tookit.com/option-payoff?contracts=1&premium=5&side=long&spot=112&strike=100&type=call");
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://invest-math.x402tookit.com/option-payoff?contracts=1&premium=5&side=long&spot=112&strike=100&type=call")
    print(res.status_code, res.text)