WritersLogic Verifiable AI Agent Hub Requirement Coverage API
The Requirement Coverage API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for requirement coverage.
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curl "https://apis.io/api/v1/apis/writerslogic-com:writerslogic-com-requirement-coverage-api"
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OpenAPI Specification
openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Requirement Coverage…
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: Requirement Coverage
paths:
/api/v1/requirement-coverage:
post:
operationId: requirement_coverage
summary: 'Checklist coverage: caller requirements against caller evidence'
description: 'Evaluates a checklist of requirements the caller defines (each made of needs on evidence keys: present, equals, one of, min/max, maximum age) against evidence the caller supplies, and returns met / unmet / unknown per requirement with the exact need and value that decided it. For an agent that must prove a task''s acceptance criteria were covered before it reports done. Does not judge whether the policy is right, does not fetch evidence, and never reads the clock (pass asOf for age checks); missing, stale or conflicting evidence is unknown, never pass.
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/requirement-coverage
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- requirements
- evidence
properties:
requirements:
type: array
items:
type: object
additionalProperties: false
required:
- id
- needs
properties:
id:
type: string
maxLength: 100
text:
type: string
maxLength: 500
description: Free text echoed in witnesses.
needs:
type: array
minItems: 1
maxItems: 20
items:
type: object
additionalProperties: false
required:
- key
properties:
key:
type: string
maxLength: 100
description: Evidence key this need reads.
equals:
description: The evidence value must equal this JSON value (deep equality).
oneOf:
type: array
maxItems: 50
items:
description: Allowed JSON value.
description: The evidence value must equal one of these.
min:
anyOf:
- type: number
- type: string
maxLength: 40
description: Inclusive lower bound. Numbers compare numerically; two dotted-digit strings (1.10.2) compare segment by segment.
max:
anyOf:
- type: number
- type: string
maxLength: 40
description: Inclusive upper bound, same comparison rules as min.
maxAgeDays:
type: number
minimum: 0
maximum: 36500
description: Evidence must be dated (asOf on the evidence item) and at most this many days before the request asOf.
mode:
type: string
enum:
- all
- any
- atLeast
description: How the needs combine. Default all; with forbid:true the default is any (the requirement is unmet as soon as one listed need applies), and all means only the conjunction is prohibited.
atLeast:
type: integer
minimum: 1
maximum: 20
description: 'With mode atLeast: how many needs must hold.'
optional:
type: boolean
description: Reported, never changes the status.
forbid:
type: boolean
description: The needs describe a prohibited condition; the requirement holds only when they are all shown not to apply.
maxItems: 100
minItems: 1
description: The checklist.
evidence:
type: array
items:
type: object
additionalProperties: false
required:
- key
properties:
key:
type: string
maxLength: 100
value:
description: Observed JSON value. Omitted means the fact is present with no value; false or null means observed absent.
asOf:
type: string
pattern: ^\d{4}-\d{2}-\d{2}(T\d{2}:\d{2}(:\d{2}(\.\d+)?)?(Z|[+-]\d{2}:\d{2}))?$
maxLength: 40
description: When this was observed (ISO date or instant).
source:
type: string
maxLength: 200
maxItems: 500
description: Observed facts. Several items may share a key (conflicts surface as unknown).
asOf:
type: string
pattern: ^\d{4}-\d{2}-\d{2}(T\d{2}:\d{2}(:\d{2}(\.\d+)?)?(Z|[+-]\d{2}:\d{2}))?$
maxLength: 40
description: Reference instant (ISO date or instant) for evidence age; required only when a need sets maxAgeDays. The check never reads the clock.
example:
requirements:
- id: tests-green
needs:
- key: test_exit_code
equals: 0
- id: coverage
needs:
- key: coverage_pct
min: 80
- id: reviewed
needs:
- key: review_approved
- key: review_bot_ok
mode: any
evidence:
- key: test_exit_code
value: 0
- key: coverage_pct
value: 83.5
- key: review_approved
value: true
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.'
requirements:
type: array
items:
type: object
properties:
id:
type: string
state:
type: string
enum:
- met
- unmet
- unknown
optional:
type: boolean
needs:
type: array
items:
type: object
properties:
key:
type: string
state:
type: string
enum:
- 'yes'
- 'no'
- unknown
reason:
type: string
enum:
- satisfied
- missing
- stale
- no-reference-instant
- no-evidence-date
- value-mismatch
- type-mismatch
- conflicting-evidence
- negative
evidence:
description: The evidence value the verdict rests on.
counts:
type: object
properties:
met:
type: integer
unmet:
type: integer
unknown:
type: integer
optional:
type: integer
description: Non-optional requirements by state; optional ones are counted separately.
unmet:
type: array
items:
type: string
maxItems: 100
description: Ids of required requirements shown unmet.
unknownIds:
type: array
items:
type: string
maxItems: 100
description: Ids of required requirements the evidence cannot decide.
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:
- Requirement Coverage
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