Drywall Calc

{
  "asOf": "2026-10-11T14:25:12.898Z",
  "boardAreaSqFt": 533,
  "ceilingSqFt": 168,
  "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.",
  "notChecked": [
    "joint compound, tape and corner bead quantities",
    "layout waste from awkward room shapes, soffits and angled walls",
    "…3 more"
  ],
  "openingsSqFt": 51,
  "reasons": [
    "Walls 416 sq ft plus ceiling 168 sq ft minus 51 sq ft of openings.",
    "Screws at roughly one per square foot of board (typical 12 to 16 in spacing).",
    "…1 more"
  ],
  "screwsApprox": 608,
  "sheetAreaSqFt": 32,
  "sheetSize": "4x8",
  "sheets": 19,
  "source": "computed locally",
  "summary": "19 sheets of 4x8 (0.5 in) for 533 sq ft with 10% waste; about 608 screws and 973 lb of board.",
  "thicknessIn": 0.5,
  "verdict": "ESTIMATE",
  "wallsSqFt": 416,
  "wastePct": 10,
  "weightLbApprox": 973
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://construction-calc.x402tookit.com/drywall-calc?doors=1&heightFt=8&lengthFt=12&sheetSize=4x8&widthFt=14&windows=2'

# 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://construction-calc.x402tookit.com/drywall-calc?doors=1&heightFt=8&lengthFt=12&sheetSize=4x8&widthFt=14&windows=2' \
  | 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%2Fconstruction-calc.x402tookit.com%2Fdrywall-calc
const res = await pay("https://construction-calc.x402tookit.com/drywall-calc?doors=1&heightFt=8&lengthFt=12&sheetSize=4x8&widthFt=14&windows=2");
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://construction-calc.x402tookit.com/drywall-calc?doors=1&heightFt=8&lengthFt=12&sheetSize=4x8&widthFt=14&windows=2")
    print(res.status_code, res.text)