Hst Size

{
  "asOf": "2026-10-12T01:13:47.840Z",
  "cutSquareInches": 3.875,
  "cutSquareNearestEighth": "3 7/8",
  "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.",
  "finishedInches": 3,
  "hstPerPairOfSquares": 2,
  "method": "two",
  "notChecked": [
    "trimming down after sewing (many quilters cut 1/4 in oversize and trim)",
    "directional fabric",
    "…1 more"
  ],
  "pairsOfSquares": 20,
  "reasons": [
    "Two-at-a-time: finished size + 7/8 in. Sew 1/4 in each side of the diagonal, cut apart, giving 2 HSTs that square up to finished + 1/2 in."
  ],
  "seamAllowanceAddedInches": 0.875,
  "source": "computed locally (seam-allowance arithmetic)",
  "squaresToCut": 40,
  "summary": "Cut 3 7/8 in squares (two-at-a-time) for 3 in finished HSTs: 40 squares for 40 units.",
  "unfinishedHstInches": 3.5,
  "unfinishedHstNearestEighth": "3 1/2",
  "verdict": "COMPUTED"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://craft-calc.x402tookit.com/hst-size?finishedInches=3&method=two&unitsNeeded=40'

# 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://craft-calc.x402tookit.com/hst-size?finishedInches=3&method=two&unitsNeeded=40' \
  | 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%2Fcraft-calc.x402tookit.com%2Fhst-size
const res = await pay("https://craft-calc.x402tookit.com/hst-size?finishedInches=3&method=two&unitsNeeded=40");
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://craft-calc.x402tookit.com/hst-size?finishedInches=3&method=two&unitsNeeded=40")
    print(res.status_code, res.text)