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Vextorium Number to Words (Spanish/English)
x402
Vextorium Number to Words (Spanish/English) is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-13).
Converts a number or monetary amount into its written-out word form in Spanish or English, supporting EUR, USD, GBP, and MXN currencies with correct grammatical forms.
Price / call$0.003
Success—
StatusUnknown
How this service works
Write a number or money amount in words, in Spanish or English (EUR, USD, GBP, MXN), with correct Spanish apocope (veintiún, un millón de euros). For invoices, cheques and contracts.
Output
Returns a JSON object containing the number spelled out in words as a string (e.g. 'mil doscientos treinta y cuatro euros con cincuenta y seis céntimos'), along with the language, currency, and original number echoed back. Optionally returns the text in all capitals.
Example use cases
Invoice amount written in Spanish
“I need to print the amount $2,500.00 USD in words on a Spanish-language invoice — can you write it out in Spanish in all capitals?”
Cheque word amount in English
“Write out 985.75 British pounds in words in English for a cheque — like 'nine hundred eighty-five pounds and seventy-five pence'.”
Mexican peso contract clause
“I'm drafting a contract in Spanish and need the amount 21,000 MXN written out as words — make sure the grammar is correct, like 'veintiún mil pesos'.”
Technical details
Endpoint
POSThttps://api.vextorium.com/numero-a-letras-pago?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a number or monetary amount converted to its written-out word form for formal documents such as invoices, cheques, or contracts, especially when correct Spanish grammatical rules (apocope: 'veintiún', 'un millón de euros') are required. It is the right choice over generic translation or NLP services when currency-aware, grammatically correct number-to-word conversion in Spanish or English is needed.
Side effects
- Missing required 'numero' field returns a validation error
- Unsupported currency code causes an error or is ignored
- Very large numbers may exceed formatting limits
- Invalid language enum value (anything other than 'es' or 'en') causes rejection
- Non-numeric input in numero field causes a schema validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"texto": "mil doscientos treinta y cuatro euros con cincuenta y seis céntimos",
"idioma": "es",
"moneda": "EUR",
"numero": 1234.56
}
}Tags
x402
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