63trust / 100

Golden Ratio

by CSS Design Calc in Other

x402 APIPassing, checked 8 h ago

Split a length into major and minor parts by the golden ratio (or silver, root-2, custom) with matching rectangle sizes.

GET
https://css-design-calc.x402tookit.com/golden-ratio
Price
$0.02
per call in USDC
Uptime
70.6%
last 30 days
Response time
527 ms
1.5 s slowest 5%
Last check
Passed
8 h ago, next any minute now

Run a free test callHow to call it

Reliability

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Status and outage history · Atom feed · Watch with other listings

How to call it

GET https://css-design-calc.x402tookit.com/golden-ratio

Each call costs $0.02 in USDC on Polygon, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

GET https://css-design-calc.x402tookit.com/golden-ratio?ratio=golden&total=1200

Parameters

ParameterTypeRequiredDescription
ratiostringNogolden (default 1.618), silver (2.414), root-2, root-3, root-5, thirds, or a number above 1
totalnumberYesThe length to split, in any unit

Example response

The provider's example. We can't check it without paying.

Example response, 30 lines
{
  "asOf": "2026-10-11T14:32:43.923Z",
  "cssGridColumns": "1.618fr 1fr",
  "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.",
  "major": 741.6407865,
  "majorPercent": 61.8034,
  "minor": 458.3592135,
  "minorPercent": 38.1966,
  "nextLarger": 1941.6407865,
  "nextSmaller": 741.6407865,
  "notChecked": [
    "whether a golden split looks better than another (a design convention, not a rule)",
    "gutters and padding, which change the effective proportions",
    "…1 more"
  ],
  "ratio": 1.6180339887,
  "ratioName": "golden",
  "reasons": [
    "The larger part divided by the smaller part equals the ratio; the whole divided by the larger part equals the ratio too only for the golden ratio.",
    "As a rectangle: width 1200 needs height 741.640786."
  ],
  "rectangleHeight": 741.6407865,
  "rectangleWidthForHeight": 1941.6407865,
  "source": "Golden ratio phi = (1 + sqrt 5)/2 and the related metallic means, computed locally",
  "summary": "1200 splits into 741.640786 (61.8034%) and 458.359214 (38.1966%) at ratio 1.618034 (golden).",
  "total": 1200,
  "verdict": "COMPUTED",
  "wholeToMajorRatio": 1.61803399
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.02.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://css-design-calc.x402tookit.com/golden-ratio?ratio=golden&total=1200'

# 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/golden-ratio?ratio=golden&total=1200' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// 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%2Fgolden-ratio
const res = await pay("https://css-design-calc.x402tookit.com/golden-ratio?ratio=golden&total=1200");
console.log(res.status, await res.text());
Python: pay and call
# 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/golden-ratio?ratio=golden&total=1200")
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

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5 days agoExpected HTTP 402, got 530530221 ms-
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6 days agoPassed402527 ms$0.02
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6 days agoPassed4021.5 s$0.02