Words to Numbers API Reference

Overview

Words to Numbers works by converting words to numbers using a predefined set of rules. It supports a wide range of words and provides the equivalent numbers in a structured format.

Endpoint

One host, one path per API. The block below shows this call in four languages; every one of them is the same HTTP request. Making requests covers the timeouts, retries and parameter rules that apply to all of them. The SDKs wrap the same call in a typed client.

GEThttps://api.apiverve.com/v1/wordstonumbers

curl "https://api.apiverve.com/v1/wordstonumbers?words=seven%20thousand%20six%20hundred%20and%20twenty" \
  -H "x-api-key: your_api_key_here"

const res = await fetch('https://api.apiverve.com/v1/wordstonumbers?words=seven%20thousand%20six%20hundred%20and%20twenty', {
  headers: { 'x-api-key': 'your_api_key_here' },
});

if (!res.ok) throw new Error(`${res.status} ${await res.text()}`);

const { data } = await res.json();
console.log(data);

import requests

res = requests.get(
    "https://api.apiverve.com/v1/wordstonumbers?words=seven%20thousand%20six%20hundred%20and%20twenty",
    headers={"x-api-key": "your_api_key_here"},
    timeout=15,
)
res.raise_for_status()

print(res.json()["data"])

package main

import (
	"fmt"
	"io"
	"net/http"
)

func main() {
	req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/wordstonumbers?words=seven%20thousand%20six%20hundred%20and%20twenty", nil)
	req.Header.Set("x-api-key", "your_api_key_here")

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()

	out, _ := io.ReadAll(res.Body)
	fmt.Println(string(out))
}

Replace your_api_key_here with the key from your dashboard. When the inputs arrive as a list rather than one at a time, batch requests run up to 200 of them through this same API in a single call.

Authentication

Send your key in the x-api-key header. That is the only auth step — there is no token exchange and no per-endpoint scope to configure. Authentication covers creating, rotating and revoking keys.

401 is the only auth verdict

A 401 means the key is missing, invalid or expired. A 403 means the key is valid but not permitted here — blocked by a key restriction or an IP allow-list. Running out of credits is a 429.

Parameters

Sent in the query string. Premium parameters are accepted on every plan but only take effect on plans that include them.

Parameter	Type	Description
`words`Required	string	The words to convert to numbers

Response

Every API returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape. Response format covers the envelope, the other output formats and how premium fields are withheld.

Sample response

{
  "status": "ok",
  "error": null,
  "data": {
    "number": "7620",
    "words": "seven thousand, six hundred twenty",
    "ordinal": "seven thousand, six hundred twentieth",
    "numberOfDigits_numeric": 4,
    "numberOfDigits_words": "four",
    "eachNumber": [
      "seven",
      "six",
      "two",
      "zero"
    ]
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Field	Type	Example	Description
`number`	string	`"7620"`	Numeric representation of the input words
`words`	string	`"seven thousand, six hundred twenty"`	Original words formatted in standard English notation
`ordinal`Premium	string	`"seven thousand, six hundred twentieth"`	Ordinal form of the number in words
`numberOfDigits_numeric`	number	`4`	Count of individual digits in the number
`numberOfDigits_words`	string	`"four"`	Digit count expressed in words format
`eachNumber`Premium	array	`[seven, ...]`	Array with each digit represented as a word

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change. Error handling covers the full status list and which of them are worth retrying.

Status	Meaning	What to do
`400`	Input was rejected	Read `error`; it names the parameter.
`401`	Key missing or invalid	Check the header name and the key value.
`403`	Key valid, but not permitted	A key restriction or IP allow-list; see key scoping.
`429`	Rate limited, or out of credits	Read `error` to tell them apart; see rate limits.

Use cases

Financial Applications: Use the Words to Numbers API to convert words to numbers in financial applications. Use the data to process checks, invoices, and receipts
Educational Tools: Develop educational tools by using the Words to Numbers API to convert words to numbers. Use the data to teach students about number systems and language
Document Processing: Process documents by using the Words to Numbers API to convert words to numbers. Use the data to automate data entry and improve accuracy in reports and forms
Game Development: Develop games by using the Words to Numbers API to convert words to numbers. Use the data to create puzzles, challenges, and interactive activities

Other ways to use Words to Numbers

Set up Words to Numbers on APIVerve, or reach the same source a different way. Your APIVerve account and credits work on all of them — one key, one balance.

Give it to an AI agentConnect over MCP and your agent calls it as a native tool — Claude, Cursor, ChatGPT.VerveKit →Reference →

Use it in Google Sheets or ExcelA =VERVE() formula fills a column — no script, no export, recalculates in place.VerveSheets →Reference →

Ground an agent on itA cited, machine-checkable fact your model can't produce on its own.VerveContext →Reference →

Words to Numbers