WritersLogic Verifiable AI Agent Hub Vin Decode API
The Vin Decode API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for vin decode.
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curl "https://apis.io/api/v1/apis/writerslogic-com:writerslogic-com-vin-decode-api"
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OpenAPI Specification
openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Vin Decode 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: Vin Decode
paths:
/api/v1/vin-decode:
post:
operationId: vin_decode
summary: 'VIN decode: manufacturer (WMI), model year, check digit'
description: 'Decodes up to 50 VINs per call for an agent handling a vehicle listing, claim or order: validates the 17 characters and letters I/O/Q, the position-9 check digit (49 CFR 565.15), the world manufacturer identifier from a bundled NHTSA vPIC snapshot, and the model year from position 10. Position 10 repeats every 30 years: pass vehicleClass light (position 7 resolves the century) or asOf, otherwise both candidate years are returned and status is unknown. It does not decode make, model, trim or engine (those are manufacturer-defined in positions 4-8), does not call vPIC at runtime, and does not say whether the vehicle exists.
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/vin-decode
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- items
properties:
items:
type: array
minItems: 1
maxItems: 50
items:
type: object
required:
- vin
properties:
vin:
type: string
minLength: 1
maxLength: 32
vehicleClass:
type: string
enum:
- light
- other
description: 'light: passenger car, MPV or truck up to 4536 kg GVWR (position 7 fixes the model-year century). other: all other vehicles.'
asOf:
type: string
pattern: ^\d{4}-\d{2}-\d{2}$
description: Reference date (YYYY-MM-DD) used to drop model years more than one year after it. No clock is read.
example:
items:
- vin: 1G4AH59H45G118341
vehicleClass: light
- vin: 1G4AH59H45G118342
vehicleClass: light
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.'
results:
type: array
items:
type: object
properties:
index:
type: integer
vin:
type: string
description: Normalized upper-case VIN.
status:
type: string
enum:
- pass
- fail
- unknown
- unsupported
wmi:
anyOf:
- type: object
properties:
wmi:
type: string
length:
type: integer
manufacturer:
type: string
country:
type: string
vehicleType:
type: string
- type: 'null'
descriptor:
anyOf:
- type: string
description: Positions 4-8 (vehicle descriptor section); manufacturer-defined, not decoded.
- type: 'null'
checkDigit:
anyOf:
- type: object
properties:
expected:
type: string
actual:
type: string
- type: 'null'
modelYear:
anyOf:
- type: integer
- type: 'null'
modelYearCandidates:
type: array
items:
type: integer
modelYearBasis:
anyOf:
- type: string
- type: 'null'
plant:
anyOf:
- type: string
description: Position 11, assembly plant code (manufacturer-defined).
- type: 'null'
sequence:
anyOf:
- type: string
description: Positions 12-17.
- type: 'null'
counts:
type: object
description: Items per status.
properties:
pass:
type: integer
fail:
type: integer
unknown:
type: integer
unsupported:
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:
- Vin Decode
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