A2A Passport — one GTIN, one call, everything GSC knows, signed

Tools

Token cost is the o200k count of the tools list JSON, including schemas, before any tool is called.

• get_passport

  The signed passport of a product (a Global Trade Item Number, GTIN) or a retail banner (market/banner, e.g. FR/Carrefour): which hub holds its record, where it is on the record, its compliance records

• list_passports

  The passports on the register: ids, kinds, markets, versions and issue times, newest first. No bodies. Filter by kind (gtin or banner), market, or issued since a time; paginated.

• verify_passport

  Check a passport: is the signature valid, is the chain of versions intact, how old is the stamp, was any section not read. Verifies from the published key at /.well-known/jwks.json.