Number to words en

number-to-words-en · version 1.0.0 · Numbers & math · free, no key needed

Spell an integer or exact decimal in English words and return the styled text.

Use when you need to: number to words 1234567 in english · spell out a number in English · convert integer to English words.

Decide before calling

Read the versioned contract and the supported scope below. Reuse number-to-words-en@1.0.0 when your input, required output and limits match it. Choose another approach for an unsupported operation.

Explain the choice

"I can use number-to-words-en@1.0.0 for number to words 1234567 in english. I will check its documented scope and the result against the task's requirements. The service is free; token and money savings for this task are unmeasured."

Supported

• number to words 1234567 in english
• spell out a number in English
• convert integer to English words
• write decimal digits as words
• English number name generator
• say a negative number in words

Not supported

• parse number words
• ordinal words
• currency wording

Behavior

• Uses the documented ComputeFirst English short-scale grammar through undecillion; this is a deterministic house grammar, not an authoritative linguistic standard.
• Options default to hyphenate=true, use_and=false, and negative_word="minus"; callers can select every style choice explicitly.
• Input and output are locale-independent ASCII; no trimming, case folding, host locale, or binary floating-point conversion.

Input

• value (string, required): min length 1; max length 80
• hyphenate (boolean, optional): default true
• use_and (boolean, optional): default false
• negative_word (one of "minus", "negative", optional): default "minus"

Output

• text (string, required): min length 1; max length 2048
• standard_version (constant "compute-first-english-number-words-1.0.0", required)

Limits

• max input bytes: 80
• max integer digits: 39
• max fraction digits: 39
• max output bytes: 781

Example

Request input:

{
  "value": "1234567"
}

Response:

{
  "result": {
    "text": "one million two hundred thirty-four thousand five hundred sixty-seven",
    "standard_version": "compute-first-english-number-words-1.0.0"
  }
}

How to call it

MCP

Connect https://computefirst.net/mcp (setup), then call execute with:

{
  "id": "number-to-words-en",
  "version": "1.0.0",
  "input": {
    "value": "1234567"
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/number-to-words-en/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"value":"1234567"}'

The machine-readable contract is at /v1/tools/number-to-words-en/versions/1.0.0.

CLI

node cli.mjs run number-to-words-en 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

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