The Deictic Check API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for deictic check.
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openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Deictic Check 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: Deictic Check
paths:
/api/v1/deictic-check:
post:
operationId: deictic_check
summary: Find unresolved references (that one, the former, tomorrow, next week) and…
description: 'Scans a user or tool message for phrases that cannot be understood without context: demonstratives (''that one'', ''the latter''), back-references (''as before'', ''the usual''), and relative dates or times (''tomorrow'', ''next Friday'', ''end of month'', ''soon''), each with offsets and a clarification question. Given a caller anchor (asOf instant plus IANA time zone) it resolves only unambiguous day offsets (today, tomorrow, yesterday, in N days/weeks, N days/weeks ago) and leaves everything else as a question; it never guesses a referent or a weekday. Rule-based and English only; pronouns such as ''it'' are not analyzed. fail means at least one slot needs clarification.
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: agent-infra
x-sample-url: https://agents.writerslogic.com/api/v1/samples/deictic-check
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- text
properties:
text:
type: string
maxLength: 20000
minLength: 1
description: Message to check.
anchor:
type: object
additionalProperties: false
properties:
asOf:
type: string
maxLength: 40
description: ISO 8601 instant with Z/offset, or a plain YYYY-MM-DD local date.
timeZone:
type: string
maxLength: 64
minLength: 1
description: IANA zone, e.g. Europe/Berlin.
required:
- asOf
- timeZone
description: Reference time for resolving unambiguous relative dates.
candidates:
type: array
items:
type: string
maxLength: 200
maxItems: 20
description: Items recently in play; echoed on reference slots for the caller to ask with. Never chosen automatically.
example:
text: Send that one to finance tomorrow, same as last time.
anchor:
asOf: '2026-11-04T09:00:00Z'
timeZone: Europe/Berlin
candidates:
- invoice 1042
- invoice 1043
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.'
slots:
type: array
items:
type: object
additionalProperties: false
properties:
kind:
type: string
enum:
- relative-date
- relative-time
- vague-time
- demonstrative-reference
- back-reference
text:
type: string
span:
type: object
description: 'Half-open [start,end) range in four coordinate systems: UTF-16 code units, code points, UTF-8 bytes, extended grapheme clusters (Intl.Segmenter).'
properties:
utf16:
type: object
properties:
start:
type: integer
end:
type: integer
codePoint:
type: object
properties:
start:
type: integer
end:
type: integer
utf8:
type: object
properties:
start:
type: integer
end:
type: integer
grapheme:
type: object
properties:
start:
type: integer
end:
type: integer
graphemeAligned:
type: boolean
sentence:
type: object
description: 'Half-open [start,end) range in four coordinate systems: UTF-16 code units, code points, UTF-8 bytes, extended grapheme clusters (Intl.Segmenter).'
properties:
utf16:
type: object
properties:
start:
type: integer
end:
type: integer
codePoint:
type: object
properties:
start:
type: integer
end:
type: integer
utf8:
type: object
properties:
start:
type: integer
end:
type: integer
grapheme:
type: object
properties:
start:
type: integer
end:
type: integer
graphemeAligned:
type: boolean
status:
type: string
enum:
- resolved
- needs-clarification
resolvedDate:
type: string
description: YYYY-MM-DD in the anchor time zone; only for unambiguous day offsets.
question:
type: string
candidates:
type: array
items:
type: string
maxLength: 200
maxItems: 20
maxItems: 200
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:
- Deictic Check
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