The receipt of every order a GSC hub gate cleared.
When an AI agent asks a GSC hub gate whether a product may be sold in a market, the hub decides and writes one receipt here: what was cleared, for whom, under which rule, when — and which product record it read. The receipt is signed by the hub, its hash is lodged on an Azure Confidential Ledger, and it is served to anyone by its decision id. No caller data, no amounts.
get_receipt(decision_id) — public, read-only: the receipt as lodged, with its ledger transaction and the hub signature check. write_receipt(receipt) — the hubs only (header x-hub-key): one write per gate decision, idempotent on the decision id.
A2A Grocery, A2A Cosmetics, A2A Peptides. Each gate answer carries receipt.decision_id, receipt.get and receipt.page. The product facts behind a decision come from gtinfetch.ai; the receipt names the source page, the date read and the signing key of that record.
https://mcp.rco-a2a.ai/mcp — no account, no authentication on reads, typed answers. A human reads a receipt at https://rco-a2a.ai/receipts/{decision_id}; the JSON sits beside it at .json.
RCO is one door with one card. It mints no agents. Hub signatures verify against each hub’s keyring; ledger entries verify against the identity certificate of gsc-rco-ledger.confidential-ledger.azure.com.
GreenCore Solutions Corp. — hubs that write receipts: A2A Grocery mcp.a2a-grocery.ai/mcp · A2A Cosmetics mcp.a2a-cosmetics.ai/mcp · A2A Peptides mcp.a2a-peptides.ai/mcp · product record gtinfetch.ai/mcp
Allooloo Technologies Corp. — door: getissuer mcp.getissuer.ai/mcp (the listed-issuer resolver; apex alias mcp.capitalmarketsknowledgegraph.ai/mcp) · twelve market nodes at mcp.ca-cm-kg.ai/mcp · mcp.uk-cm-kg.ai/mcp · mcp.us-cm-kg.ai/mcp · mcp.de-cm-kg.ai/mcp · mcp.fr-cm-kg.ai/mcp · mcp.nl-cm-kg.ai/mcp · mcp.ch-cm-kg.ai/mcp · mcp.au-cm-kg.ai/mcp · mcp.sg-cm-kg.ai/mcp · mcp.jp-cm-kg.ai/mcp · mcp.kr-cm-kg.ai/mcp · mcp.hk-cm-kg.ai/mcp
MIT licence: the RCO specification and code (github.com/Agentic-Private-Office/rco-a2a) may be used, copied, modified and implemented by anyone, provided the copyright notice is kept. © 2026 Agentic KG Holdings.