WritersLogic Verifiable AI Agent Hub Doi Check API
The Doi Check API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for doi check.
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curl "https://apis.io/api/v1/apis/writerslogic-com:writerslogic-com-doi-check-api"
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OpenAPI Specification
openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Doi Check 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: Doi Check
paths:
/api/v1/doi-check:
post:
operationId: doi_check
summary: 'DOI check: exists, retracted, or fabricated (batch of 20)'
description: 'Checks up to 20 DOIs in one call against Crossref (including its Retraction Watch notices), OpenAlex and the doi.org Handle registry. Per DOI: FOUND with title and year, RETRACTED, EXPRESSION_OF_CONCERN, CORRECTED, REGISTERED_NOT_INDEXED, NOT_REGISTERED (no such DOI anywhere: likely fabricated), INVALID_DOI or UNVERIFIED. For research agents and RAG pipelines that cite papers: run every DOI through it before it reaches a user. Pure code, no model.
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/doi-check
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- dois
properties:
dois:
type: array
minItems: 1
maxItems: 20
items:
type: string
minLength: 1
maxLength: 300
description: 'Bare DOIs, doi: prefixes or https://doi.org/ URLs.'
example:
dois:
- 10.1038/nature14539
- 10.1016/S0140-6736(97)11096-0
- https://doi.org/10.1038/fabricated-xyz-2026
responses:
'200':
description: Paid result with provenance
content:
application/json:
schema:
type: object
properties:
data:
type: object
properties:
verdict:
type: string
enum:
- FIX_REQUIRED
- REVIEW
- ALL_FOUND
description: 'FIX_REQUIRED: a retracted, unregistered or malformed DOI. REVIEW: a notice, an unindexed DOI or a failed lookup.'
counts:
type: object
properties:
FOUND:
type: integer
RETRACTED:
type: integer
EXPRESSION_OF_CONCERN:
type: integer
CORRECTED:
type: integer
REGISTERED_NOT_INDEXED:
type: integer
NOT_REGISTERED:
type: integer
INVALID_DOI:
type: integer
UNVERIFIED:
type: integer
results:
type: array
items:
type: object
properties:
input:
type: string
doi:
type: string
status:
type: string
enum:
- FOUND
- RETRACTED
- EXPRESSION_OF_CONCERN
- CORRECTED
- REGISTERED_NOT_INDEXED
- NOT_REGISTERED
- INVALID_DOI
- UNVERIFIED
title:
type: string
year:
type: integer
venue:
type: string
notices:
type: array
items:
type: object
checked:
type: array
items:
type: string
reason:
type: string
sources:
type: string
upgrade:
type: object
description: The full agent this micro check is a slice of, its price and what it adds.
properties:
agent:
type: string
path:
type: string
priceUsdc:
type: string
adds:
type: string
_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:
- Doi Check
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