The Evidence Scope Mismatch API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for evidence scope mismatch.
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openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Evidence Scope…
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: Evidence Scope Mismatch
paths:
/api/v1/evidence-scope-mismatch:
post:
operationId: evidence_scope_mismatch
summary: Check that evidence covers the scope of the claim it is used for (geography…
description: 'Compares the scope descriptors of a claim and of the evidence offered for it, per dimension: geography and population (every claimed item must be equal to, or contained in a broader evidence item according to the caller''s taxonomy), period (the evidence period must contain the claimed period; partial or no overlap is a mismatch), and version, basis and unit (must be equal after normalization). Descriptors are supplied by the caller; this check does not read text to find them, and without a taxonomy two different place or group names are unknown, never assumed related. A dimension the claim does not declare is not checked.
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/evidence-scope-mismatch
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- claim
- evidence
properties:
claim:
type: object
additionalProperties: false
properties:
geography:
type: array
items:
type: string
maxLength: 100
maxItems: 20
description: Places the statement covers (countries, regions, 'worldwide').
population:
type: array
items:
type: string
maxLength: 100
maxItems: 20
description: Who/what is covered (adults, EU residents, Series A startups).
period:
type: object
additionalProperties: false
properties:
start:
type: string
maxLength: 10
minLength: 4
description: YYYY, YYYY-MM or YYYY-MM-DD.
end:
type: string
maxLength: 10
minLength: 4
description: YYYY, YYYY-MM or YYYY-MM-DD, inclusive.
required:
- start
- end
version:
type: string
maxLength: 60
description: Software, standard or edition version.
basis:
type: string
maxLength: 100
description: 'Measurement basis: per capita, nominal, mean, gross, as-reported...'
unit:
type: string
maxLength: 60
description: Unit of measure.
description: Scope of the claim being made.
evidence:
type: object
additionalProperties: false
properties:
geography:
type: array
items:
type: string
maxLength: 100
maxItems: 20
description: Places the statement covers (countries, regions, 'worldwide').
population:
type: array
items:
type: string
maxLength: 100
maxItems: 20
description: Who/what is covered (adults, EU residents, Series A startups).
period:
type: object
additionalProperties: false
properties:
start:
type: string
maxLength: 10
minLength: 4
description: YYYY, YYYY-MM or YYYY-MM-DD.
end:
type: string
maxLength: 10
minLength: 4
description: YYYY, YYYY-MM or YYYY-MM-DD, inclusive.
required:
- start
- end
version:
type: string
maxLength: 60
description: Software, standard or edition version.
basis:
type: string
maxLength: 100
description: 'Measurement basis: per capita, nominal, mean, gross, as-reported...'
unit:
type: string
maxLength: 60
description: Unit of measure.
description: Scope of the evidence offered.
taxonomy:
type: array
items:
type: object
additionalProperties: false
properties:
broader:
type: string
maxLength: 100
minLength: 1
narrower:
type: array
items:
type: string
maxLength: 100
maxItems: 200
required:
- broader
- narrower
maxItems: 100
description: Containment facts for geography and population (40,000 characters in total), e.g. {broader:'United States', narrower:['California','Texas']}. Transitive.
example:
claim:
geography:
- Germany
period:
start: '2025-01-01'
end: '2025-12-31'
basis: per capita
evidence:
geography:
- Europe
period:
start: '2019'
end: '2019'
basis: total
taxonomy:
- broader: Europe
narrower:
- Germany
- France
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.'
dimensions:
type: array
items:
type: object
additionalProperties: false
properties:
dimension:
type: string
enum:
- geography
- population
- period
- version
- basis
- unit
verdict:
type: string
enum:
- match
- mismatch
- unknown
- not-declared
claim:
description: Claimed value.
evidence:
description: Evidence value.
detail:
type: string
maxItems: 6
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:
- Evidence Scope Mismatch
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