The Timecode Convert API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for timecode convert.
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openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Timecode Convert 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: Timecode Convert
paths:
/api/v1/timecode-convert:
post:
operationId: timecode_convert
summary: 'SMPTE timecode conversion: drop-frame and non-drop, frames, exact seconds'
description: 'Converts up to 200 timecodes, frame counts or times between SMPTE HH:MM:SS:FF (non-drop), HH:MM:SS;FF (drop-frame, 29.97 and 59.94), frame numbers and exact rational seconds, for an agent editing video, captions or logs at a stated frame rate. Rates are integers, a rational like 30000/1001, or the named 23.976, 29.97, 59.94, 119.88; any other decimal is rejected, never rounded. Integer arithmetic only; a label that does not exist (00:01:00;00 at 29.97 drop-frame) fails. It does not read media files, detect the rate or handle timecode user bits.
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/timecode-convert
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- rate
- items
properties:
rate:
type: string
minLength: 1
maxLength: 16
description: 24, 25, 30, 50, 60, 24000/1001, or the names 23.976, 29.97, 59.94, 119.88.
items:
type: array
minItems: 1
maxItems: 200
items:
type: object
properties:
timecode:
type: string
maxLength: 16
description: HH:MM:SS:FF, or HH:MM:SS;FF / HH:MM:SS.FF for drop-frame.
frames:
type: integer
minimum: 0
maximum: 10000000
seconds:
type: string
maxLength: 32
description: Decimal 12.5 or rational 1001/30.
example:
rate: '29.97'
items:
- timecode: 00:01:00;02
- frames: 1800
- timecode: 00:01:00;00
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.'
rate:
type: string
description: Resolved rational rate.
nominalFps:
type: integer
description: 'Timebase: frames per second counted by the label.'
results:
type: array
items:
type: object
properties:
index:
type: integer
status:
type: string
enum:
- pass
- fail
- unknown
- unsupported
frames:
anyOf:
- type: integer
description: Frame count since 00:00:00:00 (drop-frame labels counted per ST 12-1).
- type: 'null'
timecodeNonDrop:
anyOf:
- type: string
description: HH:MM:SS:FF label of that frame count with no frames skipped.
- type: 'null'
timecodeDropFrame:
anyOf:
- type: string
description: HH:MM:SS;FF drop-frame label; null for rates that have no drop-frame form.
- type: 'null'
seconds:
anyOf:
- type: object
properties:
exact:
type: string
description: Exact rational seconds, frames x den / num.
decimal:
type: string
description: Rounded to 6 places.
- type: 'null'
driftSecondsPerHourNonDrop:
anyOf:
- type: string
description: How far a non-drop label runs behind the wall clock per hour (3.600 at 29.97).
- type: 'null'
counts:
type: object
description: Items per status.
properties:
pass:
type: integer
fail:
type: integer
unknown:
type: integer
unsupported:
type: integer
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:
- Timecode Convert
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