# VIN Check Digit Validator & Decoder

> VIN Check Digit Validator & Decoder is a paid API for AI agents from id-validators.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-30).

Validates the check digit of a 17-character Vehicle Identification Number (VIN) and decodes its region, WMI manufacturer code, plant code, serial, and model-year candidates.

## Facts

- Endpoint: GET https://id-validators.x402tookit.com/vin-check?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vin-check-digit-validator-decoder-1da0cca0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IYr1J2gOh_zJ1lmqJNzuW

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-check-digit-validator-decoder-1da0cca0
```

Example prompt: Can you validate this VIN for me — 1HGBH41JXMN109186 — and tell me if the check digit is correct, what region and manufacturer it points to, and what model years are possible?

## When to prefer this

Choose this endpoint when you need to verify the structural integrity and check digit of a 17-character VIN and also want decoded metadata (region, WMI, model year candidates) in a single call. Prefer it over generic VIN lookup services when you need lightweight, pay-per-call validation without a subscription, or when you are building an automated pipeline that processes many VINs cost-efficiently at $0.02 per call.

## Known failure modes

- VIN is not exactly 17 characters — returns invalid verdict with reasons
- VIN contains illegal characters (I, O, Q) — returns invalid with explanation
- Check digit does not match computed value — verdict is invalid with expected digit provided
- Unknown WMI — region/manufacturer fields may be null with degraded flag set
- Network or data-source outage — degraded flag set, partial results returned
- Missing required query parameter id — likely HTTP 400 error

## How this service works

Validate a 17-character vehicle VIN check digit and decode region, manufacturer code and model-year candidates.

## Output

Returns a JSON object with: a verdict (valid/invalid), the expected check digit, the normalised VIN, the WMI code, region, plant code, serial segment, an array of possible model years, a human-readable summary, reasons for any failure, a degraded flag if data sources were unavailable, a notChecked list, a source and asOf timestamp, and a disclaimer.

## 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": [
      "id"
     ],
     "properties": {
      "id": {
       "type": "string",
       "description": "The 17-character VIN"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "wmi": {
       "type": [
        "null",
        "string"
       ]
      },
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "region": {
       "type": [
        "null",
        "string"
       ]
      },
      "serial": {
       "type": [
        "null",
        "string"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "plantCode": {
       "type": [
        "null",
        "string"
       ]
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
       ]
      },
      "normalised": {
       "type": [
        "null",
        "string"
       ]
      },
      "notChecked": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "expectedCheckDigit": {
       "type": [
        "null",
        "string"
       ]
      },
      "modelYearCandidates": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "number"
       }
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vin-check-digit-validator-decoder-1da0cca0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from id-validators.x402tookit.com](https://www.zero.xyz/host/id-validators.x402tookit.com/llms.txt)