WritersLogic Verifiable AI Agent Hub Http Cache Explain API
The Http Cache Explain API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for http cache explain.
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curl "https://apis.io/api/v1/apis/writerslogic-com:writerslogic-com-http-cache-explain-api"
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OpenAPI Specification
openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Http Cache Explain 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: Http Cache Explain
paths:
/api/v1/http-cache-explain:
post:
operationId: http_cache_explain
summary: HTTP cacheability, CORS and redirect-loop explainer
description: 'Explains from supplied response headers (and optionally the request''s headers, a CORS request, and a redirect chain) whether a shared and a private HTTP cache may store the response (RFC 9111 section 3), its freshness lifetime and basis (s-maxage, max-age, Expires minus Date, or the 10% Last-Modified heuristic), Vary, invalid max-age or Expires, the CORS check and preflight outcome per the Fetch Standard (Allow-Origin, Allow-Credentials, Allow-Methods/Headers, Vary: Origin), and a redirect loop or the 20-redirect limit. For developers and agents debugging stale or leaking caches. Does NOT fetch anything, read a clock (lifetimes are not compared to now), model a specific CDN''s overrides, or evaluate Cache-Control extensions such as stale-while-revalidate.
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: developer
x-sample-url: https://agents.writerslogic.com/api/v1/samples/http-cache-explain
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- response
properties:
response:
type: object
required:
- status
- headers
additionalProperties: false
properties:
status:
type: integer
minimum: 200
maximum: 599
description: Final status; 1xx is not cached.
headers:
type: array
maxItems: 100
items:
type: object
required:
- name
- value
additionalProperties: false
properties:
name:
type: string
maxLength: 100
value:
type: string
maxLength: 4096
request:
type: object
additionalProperties: false
properties:
method:
type: string
enum:
- GET
- HEAD
headers:
type: array
maxItems: 100
items:
type: object
required:
- name
- value
additionalProperties: false
properties:
name:
type: string
maxLength: 100
value:
type: string
maxLength: 1024
description: Only Authorization presence and Vary-selected names matter; values may be redacted.
cors:
type: object
required:
- origin
additionalProperties: false
properties:
origin:
type: string
maxLength: 300
description: Serialized request origin, e.g. https://app.example, or null.
credentials:
type: boolean
description: Request credentials mode include.
preflight:
type: boolean
description: The supplied response is the OPTIONS preflight response.
method:
type: string
maxLength: 20
headerNames:
type: array
maxItems: 30
items:
type: string
maxLength: 100
description: Request header names beyond the CORS-safelisted ones; safelisting by value is not evaluated.
redirects:
type: array
minItems: 1
maxItems: 30
items:
type: object
required:
- url
- status
- location
additionalProperties: false
properties:
url:
type: string
maxLength: 2048
status:
type: integer
minimum: 300
maximum: 399
location:
type: string
maxLength: 2048
cacheControl:
type: string
maxLength: 1024
example:
response:
status: 200
headers:
- name: Cache-Control
value: public, max-age=300
- name: Access-Control-Allow-Origin
value: https://app.example
- name: Date
value: Tue, 03 Nov 2026 10:00:00 GMT
cors:
origin: https://app.example
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.'
shared:
type: object
properties:
storable:
description: true, false, or null when undecidable from the input.
reasons:
type: array
items:
type: string
freshnessLifetimeSeconds:
description: Seconds, or null when it depends on information not supplied.
freshnessBasis:
type: string
reusableWithoutRevalidation:
description: 'true/false/null: fresh given the Age header, no no-cache.'
private:
type: object
properties:
storable:
description: true, false, or null when undecidable from the input.
reasons:
type: array
items:
type: string
freshnessLifetimeSeconds:
description: Seconds, or null when it depends on information not supplied.
freshnessBasis:
type: string
reusableWithoutRevalidation:
description: 'true/false/null: fresh given the Age header, no no-cache.'
cacheControl:
type: object
description: Parsed Cache-Control directives (first occurrence wins).
properties: {}
vary:
type: array
items:
type: string
ageSeconds:
description: Age header value or null.
cors:
description: CORS check outcome {ok, issues, acao, maxAgeSeconds}; null when no cors input.
redirects:
description: '{count, loop, limitExceeded, hops}; null when no redirects input.'
warnings:
type: array
items:
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:
- Http Cache Explain
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