The Dedup Window API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for dedup window.
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openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Dedup Window 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: Dedup Window
paths:
/api/v1/dedup-window:
post:
operationId: dedup_window
summary: 'Group webhook deliveries by identity within a time window and decide: process…'
description: 'Given previously seen deliveries (identity, receivedAt, payload or digest, handling outcome) and a new incoming one, finds earlier deliveries with the same identity inside the window and returns process (none), dedupe (same payload already processed), retry (earlier ones all failed), reconcile (an earlier one is in flight or unknown, or the same identity arrives with a different payload) or abstain (times or payload evidence missing, or the only history for this identity is dated after the incoming delivery). Also lists duplicate groups and payload conflicts in the history. A delivery exactly windowSeconds old is still inside the window. status pass = process, dedupe or retry; fail = reconcile; unknown = abstain. Holds no state: the caller supplies the history.
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/dedup-window
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- history
- incoming
- windowSeconds
properties:
history:
type: array
maxItems: 500
items:
type: object
additionalProperties: false
required:
- identity
- receivedAt
properties:
id:
type: string
minLength: 1
maxLength: 200
identity:
type: string
minLength: 1
maxLength: 200
description: 'Delivery identity: the provider''s event id, or a key built from the fields that define the event.'
receivedAt:
type: string
maxLength: 40
description: RFC 3339 instant.
payload:
description: Event body; hashed with RFC 8785 canonical JSON to detect conflicting duplicates.
payloadDigest:
type: string
minLength: 8
maxLength: 128
description: 'Alternative to payload: a digest the caller computed.'
outcome:
type: string
enum:
- processed
- failed
- in-flight
- unknown
description: What happened when this delivery was handled (history only).
incoming:
type: object
additionalProperties: false
required:
- identity
- receivedAt
properties:
id:
type: string
minLength: 1
maxLength: 200
identity:
type: string
minLength: 1
maxLength: 200
description: 'Delivery identity: the provider''s event id, or a key built from the fields that define the event.'
receivedAt:
type: string
maxLength: 40
description: RFC 3339 instant.
payload:
description: Event body; hashed with RFC 8785 canonical JSON to detect conflicting duplicates.
payloadDigest:
type: string
minLength: 8
maxLength: 128
description: 'Alternative to payload: a digest the caller computed.'
outcome:
type: string
enum:
- processed
- failed
- in-flight
- unknown
description: What happened when this delivery was handled (history only).
windowSeconds:
type: integer
minimum: 1
maximum: 2592000
windowMode:
type: string
enum:
- from-first
- sliding
description: 'from-first (default): a group''s window starts at its first delivery. sliding: each delivery extends the window.'
example:
history:
- id: d1
identity: evt_9
receivedAt: '2026-11-04T10:00:00Z'
payload:
amount: 5
outcome: processed
incoming:
identity: evt_9
receivedAt: '2026-11-04T10:00:30Z'
payload:
amount: 5
windowSeconds: 300
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.'
decision:
type: string
enum:
- process
- dedupe
- retry
- reconcile
- abstain
reason:
type: string
matchedIds:
type: array
items:
type: string
description: History entries (id or index) in the window for this identity.
groups:
type: array
items:
type: object
properties:
identity:
type: string
count:
type: integer
conflicting:
type: boolean
description: History identities seen more than once inside one window.
incomingDigest:
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:
- Dedup Window
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