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Number to Words Converter (Cardinal, Ordinal, Currency)
x402
Number to Words Converter (Cardinal, Ordinal, Currency) is a paid API for AI agents from api.24klabs.ai, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).
Converts a numeric value into its English word representation in cardinal, ordinal, or currency (dollars and cents) form for use in checks, invoices, and documents.
Price / call$0.002
Success—
StatusUnknown
How this service works
Spell a number in English words: cardinal, ordinal, or currency (dollars and cents) form for checks and invoices.
Output
A string containing the number expressed in English words in the requested form: cardinal (e.g. 'forty-two'), ordinal (e.g. 'forty-second'), or currency (e.g. 'Forty-Two Dollars and No Cents'), ready to embed in documents, checks, or invoices.
Example use cases
Check amount in written words
“I need to write out $2,345.75 in words for a paper check — give me the full currency spelling like 'Two Thousand Three Hundred Forty-Five Dollars and Seventy-Five Cents'.”
Ordinal number for event ranking
“What is 53 written out as an ordinal number in English words, like 'fifty-third'?”
Invoice written amount field
“For an invoice I'm generating, I need the number 10000 spelled out in cardinal English words — something like 'Ten Thousand'.”
Technical details
Endpoint
POSThttps://api.24klabs.ai/api/v1/number-to-wordsWhen to prefer
Choose this endpoint when you need to render a number as English words for formal documents such as checks, invoices, contracts, or legal forms — especially when cardinal, ordinal, or currency formatting is required. Prefer this over generic text generation APIs when you need deterministic, consistently formatted output without the overhead of an LLM.
Side effects
- Invalid or non-numeric input returns an error
- Unsupported format type (not cardinal/ordinal/currency) returns a validation error
- Extremely large numbers may exceed supported range
- Missing required fields returns a 400 bad request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| form | string | |
| number | number |
Output
Schema · Response
{
"type": "json",
"example": {
"form": "cardinal",
"words": "one thousand two hundred thirty-four",
"number": 1234
}
}Tags
x402
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