Grid Columns

{
  "asOf": "2026-10-11T14:32:44.186Z",
  "columnPercent": 5.92105263,
  "columnWidth": 67.5,
  "columns": 12,
  "containerWidth": 1140,
  "css": "grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: 30px;",
  "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.",
  "gutter": 30,
  "gutterTotal": 330,
  "notChecked": [
    "subpixel rounding by browsers (column widths are exact fractions)",
    "responsive breakpoints and how many columns each uses",
    "…1 more"
  ],
  "pageWidth": 1140,
  "reasons": [
    "Gutters take 330 (28.947% of the container).",
    "CSS: display: grid; grid-template-columns: repeat(12, 1fr); column-gap: 30px; with max-width 1140px."
  ],
  "source": "Grid arithmetic: container = n x column + (n - 1) x gutter, computed locally",
  "spans": [
    {
      "percentOfContainer": 5.921053,
      "percentWithGutterAfter": 8.333333,
      "span": 1,
      "width": 67.5
    },
    {
      "percentOfContainer": 14.473684,
      "percentWithGutterAfter": 16.666667,
      "span": 2,
      "width": 165
    }
  ],
  "summary": "12 columns of 67.5 with 30 gutters make a 1140 container; a 1-column span is 67.5, a 6-column span is 555.",
  "verdict": "COMPUTED"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://css-design-calc.x402tookit.com/grid-columns?columns=12&containerWidth=1140&gutter=30'

# 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://css-design-calc.x402tookit.com/grid-columns?columns=12&containerWidth=1140&gutter=30' \
  | 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%2Fcss-design-calc.x402tookit.com%2Fgrid-columns
const res = await pay("https://css-design-calc.x402tookit.com/grid-columns?columns=12&containerWidth=1140&gutter=30");
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://css-design-calc.x402tookit.com/grid-columns?columns=12&containerWidth=1140&gutter=30")
    print(res.status_code, res.text)