# Services from id-validators.x402tookit.com on Zero

> id-validators.x402tookit.com serves 9 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/id-validators.x402tookit.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/id-validators.x402tookit.com/health.json

## Services

- [VIN Check Digit Validator & Decoder](https://www.zero.xyz/c/vin-check-digit-validator-decoder-1da0cca0/llms.txt): $0.02/call via x402. 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.
- [MAC Address Parser](https://www.zero.xyz/c/mac-address-parser-f14d1536/llms.txt): $0.02/call via x402. Parses and normalizes a MAC address in any notation, returning canonical forms, OUI, cast type, and administration scope.
- [CUSIP Check Digit Validator](https://www.zero.xyz/c/cusip-check-digit-validator-5986ac86/llms.txt): $0.02/call via x402. Validates the check digit of a 9-character CUSIP security identifier and splits it into issuer and issue codes.
- [ORCID iD Validator](https://www.zero.xyz/c/orcid-id-validator-1983e6d3/llms.txt): $0.02/call via x402. Validates an ORCID iD using ISO 7064 check character verification and returns the canonical formatted identifier.
- [ISIN Check Digit Validator](https://www.zero.xyz/c/isin-check-digit-validator-b8c69190/llms.txt): $0.02/call via x402. Validates the check digit of a securities ISIN and splits it into its country code and national security identifier number (NSIN).
- [ISSN Validator and Formatter](https://www.zero.xyz/c/issn-validator-and-formatter-2ad985fa/llms.txt): $0.02/call via x402. Validates the check digit of an ISSN (International Standard Serial Number) and returns it formatted with the standard hyphen separator.
- [LEI Validator](https://www.zero.xyz/c/lei-validator-38bde6a9/llms.txt): $0.02/call via x402. Validates a 20-character Legal Entity Identifier (LEI) using ISO 7064 mod 97-10 checksum and splits it into its component parts.
- [GTIN Barcode Check Digit Validator](https://www.zero.xyz/c/gtin-barcode-check-digit-validator-6b5ea6cb/llms.txt): $0.02/call via x402. Validates the check digit of a UPC-A, EAN-8, EAN-13, or GTIN-14 barcode and identifies its format.
- [ISBN Check Digit Validator & Converter](https://www.zero.xyz/c/isbn-check-digit-validator-converter-0effacdb/llms.txt): $0.02/call via x402. Validates the check digit of an ISBN-10 or ISBN-13 and converts between the two forms.

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

- [Zero catalog index](https://www.zero.xyz/llms.txt)