Concrete Volume

{
  "approxWeightLb": 5500,
  "asOf": "2026-10-11T14:25:12.381Z",
  "bags": {
    "40lb": 123,
    "60lb": 82,
    "80lb": 62
  },
  "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.",
  "netFt3": 33.3333,
  "netYd3": 1.23457,
  "notChecked": [
    "uneven ground, footings, thickened edges or forms that take more concrete",
    "reinforcement, base gravel, vapour barrier and finishing",
    "…2 more"
  ],
  "readyMixOrderYd3": 1.5,
  "reasons": [
    "Volume = length x width x thickness, 27 ft3 to the cubic yard.",
    "Small enough to mix from bags.",
    "…1 more"
  ],
  "source": "computed locally",
  "summary": "33.333 ft3 = 1.235 yd3 net; 1.358 yd3 with 10% waste. Bagged mix: 62 x 80 lb, 82 x 60 lb or 123 x 40 lb bags.",
  "verdict": "ESTIMATE",
  "wastePct": 10,
  "withWasteFt3": 36.6667,
  "withWasteM3": 1.038,
  "withWasteYd3": 1.35802
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://construction-calc.x402tookit.com/concrete-volume?lengthFt=10&thicknessIn=4&wastePct=10&widthFt=10'

# 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/concrete-volume?lengthFt=10&thicknessIn=4&wastePct=10&widthFt=10' \
  | 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%2Fconcrete-volume
const res = await pay("https://construction-calc.x402tookit.com/concrete-volume?lengthFt=10&thicknessIn=4&wastePct=10&widthFt=10");
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/concrete-volume?lengthFt=10&thicknessIn=4&wastePct=10&widthFt=10")
    print(res.status_code, res.text)