WritersLogic Verifiable AI Agent Hub Number To Words API
The Number To Words API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for number to words.
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curl "https://apis.io/api/v1/apis/writerslogic-com:writerslogic-com-number-to-words-api"
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OpenAPI Specification
openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Number To Words API
version: 2.0.0
description: Pay-per-call agents settled in USDC on Base via x402. Every response carries a signed provenance envelope.
contact:
name: WritersLogic
url: https://writerslogic.com/agents
email: agents@writerslogic.com
servers:
- url: https://agents.writerslogic.com
tags:
- name: Number To Words
paths:
/api/v1/number-to-words:
post:
operationId: number_to_words
summary: 'Number and cheque-amount words: English (US, UK, Indian lakh/crore)'
description: 'Spells out a number or a money amount in English words for a cheque, contract or invoice, for an agent that must write the amount in words next to the figures. Locales: en-US ("one hundred twenty-three"), en-GB ("one hundred and twenty-three"), en-IN (lakh and crore, "one crore twenty lakh"). With a currency it returns the integer words, the minor-unit fraction as digits over 10^exponent ("56/100", "123/1000" for KWD, none for JPY) and a cheque line using the ISO 4217 currency name; no minor-unit names are generated. Any other locale returns unsupported rather than words that may be wrong. Integer part up to 999,999,999,999,999. Amounts with more fraction digits than the currency allows fail. Does not verify that words and figures on a document agree.
Price: 0.005 USDC on Base (x402).'
x-x402-price-usdc: '0.005'
x-x402-amount: '5000'
x-payment-info:
protocols:
- x402
price:
mode: fixed
currency: USD
amount: '0.005'
x-audience: business
x-sample-url: https://agents.writerslogic.com/api/v1/samples/number-to-words
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- items
properties:
items:
type: array
minItems: 1
maxItems: 100
items:
type: object
required:
- amount
- locale
properties:
amount:
type: string
pattern: ^-?\d{1,15}(\.\d{1,12})?$
maxLength: 30
description: 'Decimal string such as "-12.50" (up to 15 integer and 12 fraction digits). JSON numbers are not accepted: they are binary floats.'
locale:
type: string
pattern: ^[A-Za-z]{2,3}(-[A-Za-z0-9]{2,8}){0,3}$
maxLength: 35
description: 'Supported: en-US, en-GB, en-IN.'
currency:
type: string
pattern: ^[A-Z]{3}$
description: ISO 4217 alphabetic code, upper case.
exponent:
type: integer
minimum: 0
maximum: 8
description: Override the ISO 4217 exponent.
additionalProperties: false
example:
items:
- amount: '1234.56'
locale: en-US
currency: USD
responses:
'200':
description: Paid result with provenance
content:
application/json:
schema:
type: object
properties:
data:
type: object
properties:
status:
type: string
enum:
- pass
- fail
- unknown
- unsupported
description: 'pass: every rule held. fail: a rule was violated (see witnesses). unknown: the input lacks the evidence to decide. unsupported: outside what this engine covers. Missing evidence is never a pass.'
items:
type: array
items:
type: object
properties:
index:
type: integer
status:
type: string
enum:
- pass
- fail
- unknown
- unsupported
words:
type: string
description: Integer part in words, lower case; prefixed with minus when negative.
fraction:
type: string
description: Minor units over 10^exponent, e.g. 56/100; absent when the exponent is 0.
cheque:
type: string
description: Capitalised words, fraction and currency name, e.g. "One thousand two hundred thirty-four and 56/100 US Dollar".
decimalWords:
type: string
description: 'Without a currency: the fractional digits read one by one, e.g. "point four five".'
locale:
type: string
witnesses:
type: array
items:
type: object
properties:
ruleId:
type: string
detail:
type: string
path:
type: string
description: JSON pointer or dotted path into the input.
offset:
type: integer
index:
type: integer
expected:
description: What the rule required.
actual:
description: What the input had.
versions:
type: object
description: Every semantic dependency of this answer (engine, tables and their as-of dates, tokenizer, calendar, rounding profile).
limits:
type: array
items:
type: string
deterministic:
type: boolean
description: 'Always true: pure code, no model.'
_provenance:
type: object
description: C2PA-aligned manifest and W3C VC 2.0 (eddsa-jcs-2022) issued by the hub DID; verify at POST /api/v1/verify-provenance
required:
- data
- _provenance
'400':
description: Invalid request (no payment consumed)
content:
application/json:
schema:
type: object
properties:
error:
type: string
code:
type: string
'401':
description: Invalid X-API-KEY
content:
application/json:
schema:
type: object
properties:
error:
type: string
code:
type: string
'402':
description: Payment required or invalid
content:
application/json:
schema:
type: object
description: x402 v2 PaymentRequired (also base64 in the PAYMENT-REQUIRED header)
properties:
x402Version:
type: integer
error:
type: string
code:
type: string
resource:
type: object
accepts:
type: array
items:
type: object
extensions:
type: object
'502':
description: Upstream failure; the payment is released or not settled
content:
application/json:
schema:
type: object
properties:
error:
type: string
code:
type: string
tags:
- Number To Words
components:
securitySchemes:
x402:
type: apiKey
in: header
name: PAYMENT-SIGNATURE
description: x402 v2 payment payload (base64) sent after a 402 challenge
apiKey:
type: apiKey
in: header
name: X-API-KEY