The Qualifier Compare API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for qualifier compare.
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openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Qualifier Compare 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: Qualifier Compare
paths:
/api/v1/qualifier-compare:
post:
operationId: qualifier_compare
summary: 'Requested vs quoted specification attributes: met, not met or not comparable'
description: 'Compares up to 200 requested attribute requirements with the values a supplier quoted (voltage, grade, finish, tolerance, brand, certification), for an agent checking that a quote matches the request before buying. Requirements are eq, ne, gte, lte, gt, lt, between (value..max), in (a list) or present; numeric comparisons use exact decimals, an optional tolerance, and the caller''s unit conversions (none are built in). A missing quoted value, a unit with no conversion, or a non-numeric value in a numeric requirement is not-comparable, so the result is unknown rather than a pass. Text is compared after trimming and Unicode NFKC, case-insensitively unless caseSensitive. With no ordering operator and no tolerance, eq and ne read numbers only in canonical form (so "0123" and "123" are different identifiers, "100" and "100.0" are equal). Does not judge equivalence of different words or part numbers.
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/qualifier-compare
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- items
properties:
items:
type: array
minItems: 1
maxItems: 200
items:
type: object
required:
- attribute
- requested
properties:
attribute:
type: string
minLength: 1
maxLength: 80
requested:
type: object
required:
- op
properties:
op:
type: string
enum:
- eq
- ne
- gte
- lte
- gt
- lt
- between
- in
- present
value:
type: string
maxLength: 200
description: Required value (numeric ops need a decimal string).
max:
type: string
pattern: ^-?\d{1,15}(\.\d{1,12})?$
maxLength: 30
description: Upper bound for between.
values:
type: array
maxItems: 50
items:
type: string
minLength: 1
maxLength: 200
description: Allowed values for in.
unit:
type: string
minLength: 1
maxLength: 24
description: Unit of the requested number.
tolerance:
type: string
pattern: ^-?\d{1,15}(\.\d{1,12})?$
maxLength: 30
description: Absolute slack in the requested unit applied to numeric eq/gte/lte/gt/lt/between (e.g. a +/- 0.5 mm).
additionalProperties: false
quoted:
type: object
properties:
value:
type: string
maxLength: 200
unit:
type: string
minLength: 1
maxLength: 24
description: Omit or leave value out when the quote does not state the attribute.
additionalProperties: false
additionalProperties: false
conversions:
type: array
maxItems: 50
items:
type: object
required:
- from
- to
- factor
properties:
from:
type: string
minLength: 1
maxLength: 24
to:
type: string
minLength: 1
maxLength: 24
factor:
type: string
pattern: ^-?\d{1,15}(\.\d{1,12})?$
maxLength: 30
description: value in `to` = value in `from` x factor.
additionalProperties: false
description: Caller-supplied unit conversions; none are built in.
caseSensitive:
type: boolean
example:
items:
- attribute: voltage
requested:
op: gte
value: '24'
unit: V
quoted:
value: '24'
unit: V
- attribute: length
requested:
op: eq
value: '100'
unit: mm
tolerance: '0.5'
quoted:
value: '10.2'
unit: cm
- attribute: finish
requested:
op: in
values:
- anodized
- powder coat
quoted:
value: Anodised
- attribute: ip-rating
requested:
op: present
conversions:
- from: cm
to: mm
factor: '10'
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.'
items:
type: array
items:
type: object
properties:
index:
type: integer
attribute:
type: string
result:
type: string
enum:
- met
- not-met
- not-comparable
detail:
type: string
counts:
type: object
properties:
met:
type: integer
notMet:
type: integer
notComparable:
type: integer
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:
- Qualifier Compare
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