WritersLogic Verifiable AI Agent Hub Transcribe Url API
The Transcribe Url API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for transcribe url.
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curl "https://apis.io/api/v1/apis/writerslogic-com:writerslogic-com-transcribe-url-api"
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OpenAPI Specification
openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Transcribe Url 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: Transcribe Url
paths:
/api/v1/transcribe-url:
post:
operationId: transcribe_url
summary: Transcribe an audio or video file URL (Whisper, timestamps, SRT, VTT)
description: 'Transcribes a public audio or video FILE URL (podcast enclosure, meeting recording, voice memo; mp3, wav, mp4/m4a, ogg, webm, flac; up to 25 MB and 30 minutes) with Whisper large-v3-turbo on Cloudflare Workers AI. Returns timestamped segments plus SRT and VTT subtitles and the plain text, bound to the media''s SHA-256. Does NOT accept YouTube, Spotify or any streaming page (the URL must be the media file itself), does not identify speakers, and does not translate.
Price: 0.25 USDC on Base (x402).'
x-x402-price-usdc: '0.25'
x-x402-amount: '250000'
x-payment-info:
protocols:
- x402
price:
mode: fixed
currency: USD
amount: '0.25'
x-audience: business
x-sample-url: https://agents.writerslogic.com/api/v1/samples/transcribe-url
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- url
properties:
url:
type: string
minLength: 8
maxLength: 2048
pattern: ^https://
description: https URL of the audio or video file itself.
language:
type: string
pattern: ^[a-z]{2}$
description: ISO 639-1 language code of the speech (for example en); detected when omitted.
formats:
type: array
minItems: 1
maxItems: 4
items:
type: string
enum:
- segments
- srt
- vtt
- text
description: Outputs to include; default all.
max_minutes:
type: integer
minimum: 1
maximum: 30
description: Reject audio longer than this, default 30.
example:
url: https://archive.org/download/testmp3testfile/mpthreetest.mp3
language: en
formats:
- segments
- srt
max_minutes: 5
responses:
'200':
description: Paid result with provenance
content:
application/json:
schema:
type: object
properties:
data:
type: object
properties:
url:
type: string
final_url:
type: string
description: URL after redirects.
media_sha256:
type: string
description: SHA-256 (hex) of the downloaded media bytes.
bytes:
type: integer
container:
type: string
enum:
- mp3
- wav
- mp4
- ogg
- webm
- flac
duration_seconds:
anyOf:
- type: number
description: From the container for mp3/wav, else from the model; null when unknown.
- type: 'null'
language:
anyOf:
- type: string
description: Detected or requested language; null when unknown.
- type: 'null'
model:
type: string
chunks:
type: integer
description: Model requests used; mp3 and wav are split into at most 10-minute chunks.
text:
type: string
segments:
type: array
items:
type: object
properties:
start:
type: number
end:
type: number
text:
type: string
srt:
anyOf:
- type: string
description: SubRip subtitles, max 2 lines of 42 characters per cue; null when not requested.
- type: 'null'
vtt:
anyOf:
- type: string
description: WebVTT subtitles; null when not requested.
- type: 'null'
word_count:
type: integer
truncated:
type: boolean
description: True when text was cut to bound the response size.
limits:
type: object
properties:
max_bytes:
type: integer
max_minutes:
type: integer
note:
type: string
_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:
- Transcribe Url
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