The Syllable Count API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for syllable count.
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openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Syllable Count 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: Syllable Count
paths:
/api/v1/syllable-count:
post:
operationId: syllable_count
summary: Syllable counts per line, caller dictionary first, labelled English heuristic…
description: 'Counts syllables per word and per line for English text, using your dictionary entries first and otherwise a rule-based estimator (vowel groups, silent e, -ed/-es, consonant+le). Optionally checks each line against a target pattern such as 5-7-5. Where the rules cannot decide (vowel pairs like ia/io/eo, acronyms, numerals, non-Latin scripts) the word is a range or abstains, and a line whose count falls inside an undecided range is unknown rather than a guess. The estimator is a heuristic with unmeasured accuracy, not a pronouncing dictionary; supply a dictionary for names and rare words.
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/syllable-count
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- lines
properties:
lines:
type: array
items:
type: string
maxLength: 500
description: One line of text.
maxItems: 50
minItems: 1
dictionary:
type: array
items:
type: object
additionalProperties: false
required:
- word
- syllables
properties:
word:
type: string
maxLength: 60
description: Word, matched case-insensitively.
syllables:
type: integer
description: Syllable count.
minimum: 1
maximum: 20
maxItems: 500
description: Caller counts; they override the rules.
pattern:
type: array
items:
type: integer
description: Target syllables for the line at the same position.
minimum: 0
maximum: 100
maxItems: 50
description: Same length as lines.
example:
lines:
- An old silent pond
- A frog jumps into the pond
- Splash! Silence again
pattern:
- 5
- 7
- 5
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.'
lines:
type: array
items:
type: object
properties:
index:
type: integer
words:
type: array
items:
type: object
properties:
word:
type: string
syllables:
anyOf:
- type: integer
- type: 'null'
min:
type: integer
max:
type: integer
source:
type: string
enum:
- dictionary
- rule
- abstain
reason:
type: string
min:
type: integer
description: Lowest possible total over the words that have a count.
max:
anyOf:
- type: integer
- type: 'null'
total:
anyOf:
- type: integer
- type: 'null'
target:
type: integer
verdict:
type: string
enum:
- match
- mismatch
- undecided
- counted
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:
- Syllable Count
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