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

by greencore-solutions · remote · no sign-in to list tools · v1.0.2 · published by GitHub user greencore-solutions

The hubs are the records; A2A-Passport.ai issues the passport.

Changes · 2
CompareRegistry entry

3 tools: 2 change things and 1 only read.

Scanned Oct 21, 2026

1 check matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http a2a-passport https://mcp.a2a-passport.ai/mcp

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warnget_passport

    The server marks "get_passport" as not read-only (readOnlyHint: false), and its words say it reads.

    Matched text

    annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "get_passport" says "get": a word for reading.

    What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

3 tools

Changes things 2Claude Code: ask
  • get_passportThe signed passport of a product (a Global Trade Item Number, GTIN) or a retail banner (market/banner, e.g.1 finding

    Why it is in this group

    • The name "get_passport" says "get": a word for reading.
    • The server marks it as not read-only (readOnlyHint: false).

    Findings

    • Warn

      The server marks "get_passport" as not read-only (readOnlyHint: false), and its words say it reads.

      Matched text

      annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "get_passport" says "get": a word for reading.

      What this check looks for
    Description, as the server wrote it
    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, who lists it, where the payment door is. Read live from the GSC hubs on every call; the first call issues version 1. subject = a GTIN (8 to 14 digits) or market/banner; kind = gtin or banner (optional).

    Annotations the server declares

    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
    • readOnlyHint: false
  • verify_passportCheck a passport: is the signature valid, is the chain of versions intact, how old is the stamp, was any section not read.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    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.

    Annotations the server declares

    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • readOnlyHint: true
Only reads 1Claude Code: allow
  • list_passportsThe passports on the register: ids, kinds, markets, versions and issue times, newest first.No findings

    Why it is in this group

    • The name "list_passports" says "list": a word for reading.
    Description, as the server wrote it
    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.

    Annotations the server declares

    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • readOnlyHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.0.2. Values in angle brackets are yours to fill in.

claude mcp add --transport http a2a-passport https://mcp.a2a-passport.ai/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__a2a-passport__list_passports"
    ],
    "ask": [
      "mcp__a2a-passport__get_passport",
      "mcp__a2a-passport__verify_passport"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as a2a-passport. Review it before you use it.