{"name":"vin_check_digit","title":"VIN Check Digit Validator","category":"developer","description":"Validate a 17-character VIN's ISO 3779/NHTSA check digit (position 9), or compute the check digit a partial VIN would need.","price_usd":0.001,"input_schema":{"type":"object","properties":{"vin":{"type":"string","description":"17-character VIN"},"mode":{"type":"string","description":"validate | check_digit (default validate)","enum":["validate","check_digit"]}},"additionalProperties":false,"required":["vin"]}}