The Business Deadline API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for business deadline.
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openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Business Deadline 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: Business Deadline
paths:
/api/v1/business-deadline:
post:
operationId: business_deadline
summary: Business-day deadline (clear days, cutoffs, DST) on a named or caller calendar
description: 'Computes the date (and optionally the instant) a business-day deadline falls on, for an agent drafting or checking a contract, notice, SLA or partner response window: ''10 clear business days'' (both endpoints excluded) or ''within 10 business days'' (end day counted), forward or backward, with an after-cutoff roll, caller or named holiday calendar and a DST-aware deadline time. Named calendars (US federal, Federal Reserve, NYSE, UK bank holidays) carry a source, as-of date and supported range and answer `unsupported` outside it. It does not interpret contract wording, know your jurisdiction''s deeming rules, or read the clock.
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/business-deadline
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- start
- days
- counting
- calendar
properties:
start:
type: string
pattern: ^\d{4}-\d{2}-\d{2}([Tt ]\d{2}:\d{2}(:\d{2})?)?$
maxLength: 19
description: Local date YYYY-MM-DD, or local date-time YYYY-MM-DDTHH:MM[:SS] (the notice/receipt moment). Never read from the clock.
days:
type: integer
minimum: 0
maximum: 3650
counting:
type: string
enum:
- clear
- elapsed
description: 'clear: days strictly between start and deadline, so the deadline is business day N+1. elapsed: the deadline is business day N after start (the end day is counted).'
direction:
type: string
enum:
- after
- before
description: Default after. before counts backward from start (for 'at least N days before the hearing').
calendar:
type: string
enum:
- us-federal
- us-federal-reserve
- nyse
- us-equities-settlement
- uk-england-and-wales
- uk-scotland
- uk-northern-ireland
- weekends-only
- caller
description: Named holiday calendar with a source and supported date range (outside it the answer is unsupported), weekends-only (Saturday/Sunday only), or caller (only the holidays you list).
holidays:
type: array
maxItems: 400
items:
type: string
pattern: ^\d{4}-\d{2}-\d{2}$
maxLength: 10
description: Extra non-business dates YYYY-MM-DD (company closures, a calendar we do not carry).
weekend:
type: array
maxItems: 6
items:
type: integer
minimum: 0
maximum: 6
description: Non-business weekdays, 0=Sunday..6=Saturday. Default [0, 6]; use [5, 6] for a Friday/Saturday weekend.
cutoff:
type: string
pattern: ^([01]\d|2[0-3]):[0-5]\d$
maxLength: 5
description: Local HH:MM. With a date-time start (direction after), a start strictly later than the cutoff, or on a non-business day, is deemed received on the next business day. 17:00 exactly is on time. Without cutoff there is no roll.
deadlineTime:
type: string
pattern: ^([01]\d|2[0-3]):[0-5]\d$
maxLength: 5
description: Local HH:MM at which the deadline expires on the deadline date; needs timeZone to produce an instant.
timeZone:
type: string
pattern: ^[A-Za-z][A-Za-z0-9_+-]*(/[A-Za-z0-9_+-]+){0,2}$
maxLength: 64
description: IANA zone for deadlineTime.
disambiguation:
type: string
enum:
- earlier
- later
description: 'How to read a deadline time that falls in a DST gap (earlier: before-gap offset reading backward; later: shifted forward) or overlap (earlier/later occurrence). Without it, a gap or overlap returns unknown with both candidates.'
claimedDeadline:
type: string
pattern: ^\d{4}-\d{2}-\d{2}$
maxLength: 10
description: A deadline date someone asserted; the check fails with the computed date if it differs.
example:
start: '2026-12-18'
days: 10
counting: clear
calendar: us-federal
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.'
deadlineDate:
type: string
weekday:
type: string
effectiveStart:
type: string
startRolled:
type: boolean
startRollReason:
type: string
businessDaysCounted:
type: integer
clearBusinessDays:
type: integer
skipped:
type: array
items:
type: object
properties:
date:
type: string
reason:
type: string
description: Non-business days stepped over (first 60).
skippedCount:
type: integer
deadlineLocal:
type: string
deadlineUtc:
type: string
wallTimeKind:
type: string
enum:
- normal
- gap
- overlap
candidatesUtc:
type: array
items:
type: string
reason:
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:
- Business Deadline
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