# VIN Validation API (ISO 3779)

> VIN Validation API (ISO 3779) is a paid API for AI agents from api.aventtech.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-10).

Validates a 17-character Vehicle Identification Number (VIN) per ISO 3779, verifying structure, check digit at position 9, and decomposing WMI/VDS/VIS segments with model-year decoding.

## Facts

- Endpoint: GET https://api.aventtech.com/validate/vin?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vin-validation-api-iso-3779-ddf77dc2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iwFG6UiBqGswbZisoGg7V

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability vin-validation-api-iso-3779-ddf77dc2
```

Example prompt: Can you validate this VIN for me — 1HGBH41JXMN109186 — and tell me if the structure and check digit are correct and what the WMI, VDS, VIS, and model year are?

## When to prefer this

Use this endpoint when you need to validate or decode a VIN against the ISO 3779 standard, particularly when you require check-digit verification and structured WMI/VDS/VIS decomposition. Prefer this over manual regex checks when authoritative structural validation and model-year decoding are needed in an automated pipeline.

## Known failure modes

- VIN shorter or longer than 17 characters returns validation error
- Invalid check digit returns failure with expected vs actual digit
- Malformed input (non-alphanumeric characters) returns parse error
- Missing 'vin' query parameter returns 400 bad request
- Payment not provided or insufficient returns 402 Payment Required

## How this service works

Vehicle Identification Number validation (ISO 3779): 17-char structure, check digit (position 9), WMI/VDS/VIS decomposition and model-year code.

## Output

Returns whether the 17-character VIN is structurally valid per ISO 3779, whether the check digit at position 9 passes, and a decomposition of the three VIN sections: WMI (World Manufacturer Identifier, chars 1–3), VDS (Vehicle Descriptor Section, chars 4–8), and VIS (Vehicle Identifier Section, chars 10–17), along with the decoded model-year code.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "vin"
     ],
     "properties": {
      "vin": {
       "type": "string",
       "description": "17-character VIN"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "wmi": "1HG",
  "valid": true,
  "modelYearCode": "3"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vin-validation-api-iso-3779-ddf77dc2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.aventtech.com](https://www.zero.xyz/host/api.aventtech.com/llms.txt)