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CSS Design Calc – Modular Type Scale
x402
CSS Design Calc – Modular Type Scale is a paid API for AI agents from css-design-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).
Generates a modular type scale with px and rem values for steps above and below a base font size, using named or numeric ratios.
Price / call$0.02
Success—
StatusUnknown
How this service works
Modular type scale: sizes in px and rem for steps below and above a base size, by named ratio (major third, golden) or number.
Output
Returns an array of type scale steps, each with a step index, size in px, size in rem, and a CSS custom property snippet. Also includes the resolved ratio value and name, base size, root px, and step counts above and below.
Example use cases
Design system typography tokens
“I'm building a design system and need a type scale — give me px and rem values for 8 steps above and 2 below a 16px base using the perfect-fourth ratio, with 16px as the root.”
Heading sizes for a content-heavy site
“What font sizes should I use for h1 through h6 if I start from 18px and use a golden ratio scale? Give me 5 steps up and 1 step down, root at 18px.”
Compact scale for a dense UI
“Calculate a minor-third modular type scale from a 14px base, 4 steps above and 1 below, root at 16px — I need the rem values to set CSS custom properties for a compact dashboard.”
Technical details
Endpoint
GEThttps://css-design-calc.x402tookit.com/type-scale?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a mathematically consistent, harmonically spaced set of font sizes derived from a single base and ratio — ideal for design tokens, CSS custom properties, or any situation requiring named musical/typographic ratios rather than manually picked sizes.
Side effects
- Missing required 'base' query parameter returns an error
- Ratio value ≤ 1 is invalid and will be rejected
- Steps above > 12 or steps below > 6 may be out of range
- Non-numeric, non-enum ratio string returns an error
- Network or payment authorization failure returns a 402 or 5xx
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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