Words to Numbers API

About the Words to Numbers API

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.

What people use it for

Check Amount Extraction

When scanning physical checks or legal agreements, extract spelled-out dollar amounts and convert them into numeric totals for accounting systems.

Voice Order Intake

Food delivery ordering systems convert spoken quantity phrases captured from customer audio into integers to add items to carts.

Survey Form Normalization

To prevent database validation errors, transform written numerical survey responses into standardized digits before saving records.

Invoice Total Verification

Extract written values from scanned invoices and convert them to digits to verify purchase totals against line items.

Ways to call it

One endpoint, many ways in — REST with JSON, XML, YAML and CSV, plus GraphQL and an MCP interface for AI agents.

JSON

Default REST response

XML

Markup format

YAML

Human-readable

CSV

Tabular export

Beta

GraphQL

Query language

New

MCP

For AI agents

Request parameters — GET /v1/wordstonumbers

Sent in the query string. Premium parameters are accepted on every plan but only take effect on plans that include them. Anything not listed here is dropped rather than passed through.

Required

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

Authentication

Send your key in the x-api-key header. That is the only auth step — no token exchange, and no per-endpoint scope to configure.

Response — GET /v1/wordstonumbers

Every APIVerve endpoint returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape.

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{
  "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.

Response headers

Every response carries your balance, so your own code always knows where it stands without polling anything. All four are exposed to browsers through CORS.

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change.

What a call costs — 2 credits per call

Credits are shared across every APIVerve API — one balance, one key, one bill. Failed requests never count against it, so a rejected input costs nothing.

Calls are what the credits buy at this API's rate — spend them here, on any of the other APIs, or across both. Nothing is reserved per endpoint.

Zero-code embed — one snippet, no backend

Drop an interactive Words to Numbers form onto any page. The widget calls the API for you, so no key ever appears in your markup and there is nothing to deploy.

Changelog — Words to Numbers API

Every change to this endpoint, newest first. Breaking changes ship as a new version and the previous one keeps serving — response fields are added, never removed or retyped in place, so an integration written against v1 keeps working.

Currently v1