# Services from trade.chainverdict.xyz on Zero

> trade.chainverdict.xyz serves 8 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/trade.chainverdict.xyz
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/trade.chainverdict.xyz/health.json

## Services

- [GTIN/UPC/EAN Barcode Validator](https://www.zero.xyz/c/gtin-upc-ean-barcode-validator-162f06fb/llms.txt): $0.004/call via x402. Validates a GTIN-8, GTIN-12 (UPC-A), GTIN-13 (EAN-13), or GTIN-14 barcode code by checking the check digit, format correctness, GTIN-14 normalization, and packaging indicator.
- [ISO 6346 Shipping Container Number Validator](https://www.zero.xyz/c/iso-6346-shipping-container-number-validator-69eba631/llms.txt): $0.004/call via x402. Validates an ISO 6346 shipping container number by checking the owner code, category identifier, serial number, and check digit.
- [ChainVerdict GS1 Element String Decoder](https://www.zero.xyz/c/chainverdict-gs1-element-string-decoder-dc803e31/llms.txt): $0.006/call via x402. Decodes a GS1 element string or GS1-128 barcode payload into its structured application identifier components and values.
- [GS1 GTIN/EAN Prefix to Member Organisation Resolver](https://www.zero.xyz/c/gs1-gtin-ean-prefix-to-member-organisation-resolver-43642d48/llms.txt): $0.004/call via x402. Resolves a GTIN or EAN prefix code to its corresponding GS1 Member Organisation (the national/regional GS1 body that issued the prefix).
- [GS1 Check Digit Calculator](https://www.zero.xyz/c/gs1-check-digit-calculator-ca03b791/llms.txt): $0.004/call via x402. Computes the GS1 check digit for a code body (GTIN, SSCC, etc.) that is missing its final check digit.
- [IMO Ship Number Check Digit Validator](https://www.zero.xyz/c/imo-ship-number-check-digit-validator-41b9551e/llms.txt): $0.004/call via x402. Validates the check digit of an IMO ship identification number to confirm it is correctly formed.
- [SSCC-18 Logistics Unit Code Validator](https://www.zero.xyz/c/sscc-18-logistics-unit-code-validator-b3d07904/llms.txt): $0.004/call via x402. Validates an SSCC-18 (Serial Shipping Container Code) logistics unit barcode for correct format and check digit.
- [ChainVerdict HS Code Classifier](https://www.zero.xyz/c/chainverdict-hs-code-classifier-de8036a2/llms.txt): $0.05/call via x402. Returns ranked candidate HS-2022 headings with official heading text, GRI notes, and broker disclaimer for a given goods description.

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)