WritersLogic Verifiable AI Agent Hub Pod Sufficiency API
The Pod Sufficiency API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for pod sufficiency.
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curl "https://apis.io/api/v1/apis/writerslogic-com:writerslogic-com-pod-sufficiency-api"
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OpenAPI Specification
openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Pod Sufficiency 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: Pod Sufficiency
paths:
/api/v1/pod-sufficiency:
post:
operationId: pod_sufficiency
summary: Proof-of-delivery sufficiency against a required evidence list
description: 'Checks whether the proof-of-delivery evidence supplied (signature, photo, timestamp, GPS fix, recipient name, scan ...) satisfies the carrier or contract requirement list the caller gives: every required item, plus optional ''at least k of these'' groups, with value bounds (for example GPS accuracy at most 30 m) and maximum age. For an agent assembling a delivery dispute or a payment release. Returns which items are present, missing or out of bounds; does not validate that a signature or photo is genuine, and absent evidence is unknown, not 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/pod-sufficiency
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- required
- evidence
properties:
required:
type: array
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.
maxItems: 100
minItems: 1
description: Evidence every proof must contain (key plus optional bounds).
anyOf:
type: array
items:
type: object
additionalProperties: false
required:
- id
- keys
properties:
id:
type: string
maxLength: 100
description: Group id.
keys:
type: array
items:
type: string
maxLength: 100
description: Evidence key.
maxItems: 20
minItems: 1
atLeast:
type: integer
minimum: 1
maximum: 20
maxItems: 20
description: 'Alternative groups: at least atLeast (default 1) of the keys must be present.'
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: Proof elements the caller holds.
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:
required:
- key: recipient_name
- key: delivered_at
maxAgeDays: 30
- key: gps_accuracy_m
max: 30
anyOf:
- id: proof
keys:
- signature
- photo
evidence:
- key: recipient_name
value: J. Rivera
- key: delivered_at
value: '2026-10-30T14:02:00Z'
asOf: '2026-10-30'
- key: gps_accuracy_m
value: 12
- key: photo
asOf: '2026-11-04'
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.
sufficient:
anyOf:
- type: boolean
- type: 'null'
description: true when pass, false when fail, null when undecidable.
missing:
type: array
items:
type: string
maxItems: 100
description: Keys with no evidence.
outOfBounds:
type: array
items:
type: string
maxItems: 100
description: Keys whose evidence violates the bound or value.
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:
- Pod Sufficiency
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