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Roman Numeral Converter
x402
Roman Numeral Converter is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Converts integers (1–3999) to Roman numerals or Roman numerals back to integers, with input validation both ways.
Price / call$0.01
Success—
StatusUnknown
How this service works
Roman numeral converter both ways: an integer (1-3999) to Roman numerals or a Roman numeral to an integer, with validation. $0.01 per call.
Output
Returns the converted value — either the Roman numeral string for a given integer, or the integer for a given Roman numeral — along with validation indicating whether the input was valid and within range (1–3999).
Example use cases
Year formatted as Roman numeral
“What is the year 1999 written in Roman numerals?”
Decode Roman numeral inscription
“What number does the Roman numeral MCMXCIX represent?”
Validate a Roman numeral string
“Is MMMMCMXCIX a valid Roman numeral, and if so, what number does it equal?”
Technical details
Endpoint
GEThttps://intel.rallylive.ca/data/romanWhen to prefer
Use this endpoint when you need bidirectional Roman numeral conversion with built-in validation. Ideal for formatting years, chapter numbers, or historic dates in Roman numeral style, or for parsing Roman numerals found in text back to integers. Prefer over manual logic when validation of the input's legality is also required.
Side effects
- Integer out of range (0 or 4000+) returns a validation error
- Malformed or invalid Roman numeral string returns a validation error
- Empty or missing input parameter returns an error
- Non-numeric string passed where integer expected causes rejection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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