# Number to Words Converter

> Number to Words Converter is a paid API for AI agents from units-convert.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-21).

Converts a whole number (or dollar amount) into its English cardinal words, ordinal words, and check-writing dollar/cents format.

## Facts

- Endpoint: GET https://units-convert.x402tookit.com/number-words?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/number-to-words-converter-e488a2b8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6EqG1A7l091OoveTdxseH

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability number-to-words-converter-e488a2b8
```

Example prompt: How do you write 42518 in English words — both as a cardinal number and in check-writing format with dollars and cents?

## When to prefer this

Use this endpoint when you need to render a number as English text for human-readable documents, checks, or formal writing. It handles both cardinal and ordinal forms plus the specific check-writing dollar/cents convention, making it more complete than generic number-to-text libraries for financial and legal contexts.

## Known failure modes

- Value exceeds 999 quadrillion limit — input rejected
- Non-integer or unsupported numeric format — unexpected results
- Negative numbers may not be supported
- Missing required 'value' query parameter — request fails

## How this service works

Write a whole number in English words (cardinal and ordinal) and as a check-writing amount in dollars and cents.

## Output

Returns the cardinal English word form (e.g. 'forty-two thousand five hundred eighteen'), the ordinal form (e.g. 'forty-two thousand five hundred eighteenth'), the whole number part, cents value, and a check-writing formatted string (e.g. 'forty-two thousand five hundred eighteen and 00/100 dollars').

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "value"
     ],
     "properties": {
      "value": {
       "type": "number",
       "description": "Whole number or amount up to 999 quadrillion; decimals are read as cents"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "cents": {
       "type": [
        "null",
        "number"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "ordinal": {},
      "reasons": {
       "type": [
        "array",
        "null"
       ]
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "cardinal": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "wholePart": {
       "type": [
        "null",
        "number"
       ]
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
       ]
      },
      "notChecked": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "checkAmount": {
       "type": [
        "null",
        "string"
       ]
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/number-to-words-converter-e488a2b8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from units-convert.x402tookit.com](https://www.zero.xyz/host/units-convert.x402tookit.com/llms.txt)