Recipe Scale

{
  "asOf": "2026-10-11T14:26:09.781Z",
  "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.",
  "factor": 1.5,
  "items": [
    {
      "grams": 375,
      "gramsNote": "approximate, 125 g per cup",
      "ingredientMatched": "all-purpose flour",
      "name": "flour",
      "original": "2 cups flour",
      "quantity": 3,
      "scaled": "3 cup flour",
      "unit": "cup"
    },
    {
      "grams": 14,
      "gramsNote": "approximate, 288 g per cup",
      "ingredientMatched": "table salt",
      "name": "salt",
      "original": "1 1/2 tsp salt",
      "quantity": 2.25,
      "scaled": "2 1/4 tsp salt",
      "unit": "tsp"
    }
  ],
  "notChecked": [
    "cooking time and temperature, which do not scale with quantity (a double batch needs longer, not twice as long)",
    "pan size: the right pan scales by volume (see /pan-scaling)",
    "…2 more"
  ],
  "reasons": [
    "Straight proportional scaling."
  ],
  "source": "computed locally",
  "summary": "Scaled 5 line(s) by 1.5x.",
  "verdict": "SCALED"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://cooking-calc.x402tookit.com/recipe-scale?fromServings=4&grams=true&ingredients=2+cups+flour%3B+1+1%2F2+tsp+salt%3B+3%2F4+cup+sugar%3B+2+eggs%3B+1%2F2+cup+butter&toServings=6'

# 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://cooking-calc.x402tookit.com/recipe-scale?fromServings=4&grams=true&ingredients=2+cups+flour%3B+1+1%2F2+tsp+salt%3B+3%2F4+cup+sugar%3B+2+eggs%3B+1%2F2+cup+butter&toServings=6' \
  | 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%2Fcooking-calc.x402tookit.com%2Frecipe-scale
const res = await pay("https://cooking-calc.x402tookit.com/recipe-scale?fromServings=4&grams=true&ingredients=2+cups+flour%3B+1+1%2F2+tsp+salt%3B+3%2F4+cup+sugar%3B+2+eggs%3B+1%2F2+cup+butter&toServings=6");
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://cooking-calc.x402tookit.com/recipe-scale?fromServings=4&grams=true&ingredients=2+cups+flour%3B+1+1%2F2+tsp+salt%3B+3%2F4+cup+sugar%3B+2+eggs%3B+1%2F2+cup+butter&toServings=6")
    print(res.status_code, res.text)