CSS Design Calc

css-design-calc.x402tookit.com · 12 paid endpoints · listed 2026-11-02

Snap line-heights for font sizes to a baseline grid: baseline unit, lines per element, unitless line-height and margins.

pendinglast check not yet
–valid x402 answers, 72 h
sharedUSDC received on Base, 7 days
2distinct payers, 7 days
10.5score (0-100)

Paid endpoints

MethodEndpointPriceNetworks
GETcss-design-calc.x402tookit.com/aspect-ratio
Aspect ratio of a width and height (simplified, nearest common ratio) or the missing side for a ratio, with CSS values.
$0.02Polygon, Arbitrum, Base, Solana
GETcss-design-calc.x402tookit.com/box-size
CSS box model sizes: content, padding, border and margin boxes from a width and height under content-box or border-box.
$0.02Polygon, Arbitrum, Base, Solana
GETcss-design-calc.x402tookit.com/clamp-fluid
Generate a CSS clamp() that scales a size linearly between a min and max viewport width, in rem, with the exact slope.
$0.02Polygon, Arbitrum, Base, Solana
GETcss-design-calc.x402tookit.com/css-specificity
CSS selector specificity (ids, classes, types) per Selectors Level 4, including :is(), :not(), :where() and :has(); compare two.
$0.02Polygon, Arbitrum, Base, Solana
GETcss-design-calc.x402tookit.com/css-unit-convert
Convert a CSS length between px, rem, em, pt, pc, in, cm, mm, Q, vw, vh, vmin, vmax and % with your root and viewport sizes.
$0.02Polygon, Arbitrum, Base, Solana
GETcss-design-calc.x402tookit.com/golden-ratio
Split a length into major and minor parts by the golden ratio (or silver, root-2, custom) with matching rectangle sizes.
$0.02Polygon, Arbitrum, Base, Solana
GETcss-design-calc.x402tookit.com/grid-columns
Column and span widths for an N-column grid from container width, columns and gutter, or the container for a column width.
$0.02Polygon, Arbitrum, Base, Solana
GETcss-design-calc.x402tookit.com/line-length
Estimate characters per line from column width and font size and rate it for readability (45-75 ideal, WCAG max 80).
$0.02Polygon, Arbitrum, Base, Solana
GETcss-design-calc.x402tookit.com/pixel-density
Screen pixel density (PPI) from resolution and diagonal, physical size, CSS viewport at a device pixel ratio, and image widths.
$0.02Polygon, Arbitrum, Base, Solana
GETcss-design-calc.x402tookit.com/target-size
Check a click or touch target against WCAG 2.2 target size (24 px AA, 44 px AAA) including the spacing exception.
$0.02Polygon, Arbitrum, Base, Solana
GETcss-design-calc.x402tookit.com/type-scale
Modular type scale: sizes in px and rem for steps below and above a base size, by named ratio (major third, golden) or number.
$0.02Polygon, Arbitrum, Base, Solana
GETcss-design-calc.x402tookit.com/vertical-rhythm
Snap line-heights for font sizes to a baseline grid: baseline unit, lines per element, unitless line-height and margins.
$0.02Polygon, Arbitrum, Base, Solana

Latest checks

WhenEndpointHTTPmsResult
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Income on Base (7 days)

This provider's payout address is shared by several providers, so its income is not shown as its own.

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Income is all USDC received by the provider's payout address on Base, whatever the source. Score: 0-100: 50 x share of checks in the last 72 h that returned valid x402 payment terms + 30 x min(1, log10(1 + USDC received in 7 days) / 4) + 20 x min(1, log10(1 + distinct payers in 7 days) / 3). A provider never checked scores on income only; income is all USDC received by its payout address on Base, whatever the source. JSON: /v1/observatory/providers/css-design-calc.x402tookit.com