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Locale and Formatting Tools – Format Number
x402
Locale and Formatting Tools – Format Number is a paid API for AI agents from locale-tools.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-11-02).
Format a number as decimal, percent, compact (1.2K), or unit text in any BCP47 locale with configurable fraction digit control.
Price / call$0.02
Success—
StatusUnknown
How this service works
Format a number as decimal, percent, compact (1.2K) or unit text in any BCP47 locale, with digit control.
Output
Returns a JSON object containing the formatted string (e.g. '1,2 Mio.'), the resolved locale, the style applied, an array of format parts (type + value tokens), CLDR and ICU version metadata, and an optional disclaimer or degraded flag if locale support is partial.
Example use cases
Dashboard number localization for international users
“I need to display the value 98765 as a compact number (like '98.8K') in Japanese locale ja-JP with no fraction digits — what does that look like?”
Percentage display for analytics report
“Format 0.0342 as a percentage in French locale fr-FR, showing exactly 2 decimal places, so it renders something like '3,42 %'.”
Unit formatting for a metric measurement app
“Show the number 120.5 formatted as kilometers per hour in Italian locale it-IT using unit style with short display — what's the localized string?”
Technical details
Endpoint
GEThttps://locale-tools.x402tookit.com/format-number?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need locale-aware number formatting beyond simple toString() — particularly for multi-locale dashboards, internationalized reports, or user-facing UIs where separators, compact notation, percent signs, and unit labels must follow regional conventions. Prefer it over hardcoded formatting when targeting non-English locales (Arabic, German, Hindi, Japanese) or when you need fraction digit control and CLDR-compliant output parts for custom rendering.
Side effects
- Unsupported or malformed BCP47 locale tag returns an error or falls back to en-US with a warning
- Value exceeding 1e18 absolute is rejected
- Invalid style enum value (not decimal/percent/compact/unit) causes a validation error
- Unit style without a valid ECMA-402 unit string returns an error
- minFractionDigits > maxFractionDigits causes a conflict error
- Missing required 'value' query parameter returns a 400-level error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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