Spell a number out in words in English, Dutch, German, French, Spanish, Italian,
Spell a number out in words in English, Dutch, German, French, Spanish, Italian, Portuguese, Polish, Russian, Turkish, Swedish or Japanese, in cardinal, ordinal or currency form. Currency form agrees the number with the currency noun and gives real minor-unit names for 19 currencies (EUR, USD, GBP, CHF, SEK, NOK, DKK, PLN, RUB, TRY, CNY, INR, BRL, MXN, CAD, AUD, NZD, CZK, HUF); any other ISO 4217 code uses a fraction such as 56/100. Values up to 10^15.
Answeringour last check, 2026-09-29
1 of 1checks answered this week
659 msmedian answer time
$0.05listed price per call
$0.05price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://api.duoleads.com/v1/num/words
| Category | Code and developer |
|---|---|
| Provider host | api.duoleads.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-29 | valid payment request | 402 | $0.05 | 659 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"lang": "nl",
"value": "1234"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"case": {
"default": "lower",
"description": "lower (default), sentence or title.",
"enum": [
"lower",
"sentence",
"title"
],
"maxLength": 64,
"type": "string"
},
"currency": {
"description": "ISO 4217 code. Required when form=currency, rejected otherwise.",
"maxLength": 16,
"type": "string"
},
"form": {
"default": "cardinal",
"description": "cardinal (default), ordinal, currency or year.",
"enum": [
"cardinal",
"ordinal",
"currency",
"year"
],
"maxLength": 64,
"type": "string"
},
"lang": {
"default": "en",
"description": "Language, ISO 639-1. Default en.",
"enum": [
"en",
"nl",
"de",
"fr",
"es",
"it",
"pt",
"pl",
"ru",
"tr",
"sv",
"ja"
],
"maxLength": 64,
"type": "string"
},
"value": {
"description": "Integer or decimal, absolute value below 1e15.",
"maxLength": 32,
"type": "string"
}
},
"required": [
"value"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"data": {
"properties": {
"currency": {
"properties": {
"code": {
"type": "string"
},
"minor_plural": {
"type": [
"string",
"null"
]
},
"minor_singular": {
"type": [
"string",
"null"
]
},
"minor_units": {
"type": "integer"
},
"unit_plural": {
"type": "string"
},
"unit_singular": {
"type": "string"
}
},
"required": [
"code",
"unit_singular",
"unit_plural",
"minor_singular",
"minor_plural",
"minor_units"
],
"type": [
"object",
"null"
]
},
"form": {
"type": "string"
},
"lang": {
"type": "string"
},
"parts": {
"properties": {
"integer_words": {
"type": "string"
},
"minor_words": {
"type": [
"string",
"null"
]
}
},
"required": [
"integer_words",
"minor_words"
],
"type": [
"object",
"null"
]
},
"rounding_applied": {
"type": "boolean"
},
"value": {
"type": "string"
},
"words": {
"type": "string"
}
},
"required": [
"words",
"value",
"lang",
"form",
"currency"
],
"type": "object"
},
"meta": {
"properties": {
"computed_at": {
"description": "RFC 3339 UTC with milliseconds",
"type": "string"
},
"deterministic": {
"type": "boolean"
},
"disclaimer": {
"type": "string"
},
"price_usd": {
"type": "string"
},
"request_id": {
"type": "string"
},
"sources": {
"items": {
"required": [
"id",
"version",
"published"
],
"type": "object"
},
"type": "array"
}
},
"required": [
"request_id",
"computed_at",
"price_usd",
"deterministic",
"disclaimer"
],
"type": "object"
},
"ok": {
"const": true
},
"route"