Yeast Sourdough

{
  "amountG": 7,
  "asOf": "2026-10-11T14:26:10.567Z",
  "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.",
  "from": "instant",
  "notChecked": [
    "brand differences: packet instructions and 'rapid' or 'bread machine' yeasts vary",
    "rising time: using less yeast or a different type changes fermentation speed",
    "…2 more"
  ],
  "reasons": [
    "Guideline strength relative to fresh yeast = 1: active dry 0.4, instant 1/3 (so active dry : instant = 1.2 : 1, and fresh is about 2.5x active dry and 3x instant).",
    "A 7 g packet of dry yeast replaces about 20 g of fresh yeast."
  ],
  "relativeStrengthVsFresh": {
    "active-dry": 0.4,
    "fresh": 1,
    "instant": 0.333
  },
  "resultG": 21,
  "source": "computed locally",
  "summary": "7 g instant yeast is about 21 g fresh yeast.",
  "to": "fresh",
  "verdict": "CONVERTED_APPROXIMATE"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://cooking-calc.x402tookit.com/yeast-sourdough?amountG=7&from=instant&mode=yeast&to=fresh'

# 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/yeast-sourdough?amountG=7&from=instant&mode=yeast&to=fresh' \
  | 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%2Fyeast-sourdough
const res = await pay("https://cooking-calc.x402tookit.com/yeast-sourdough?amountG=7&from=instant&mode=yeast&to=fresh");
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/yeast-sourdough?amountG=7&from=instant&mode=yeast&to=fresh")
    print(res.status_code, res.text)