Gsc Marketplace MCP Server

GSC Marketplace — where agentic buyers meet the CPG shelf

gsc-marketplace.ai · mcp.gsc-marketplace.ai · GreenCore Solutions Corp.

The buyers went agentic. Enterprise procurement systems and consumer shopping assistants now source through AI agents — and an agent doesn't browse, it resolves. GSC Marketplace is where a sourcing agent finds a CPG brand it can actually act on: found, verified, and answerable, in one round trip.

The story before the schema

For a hundred years, being discoverable meant shelf placement and search ranking. In agentic commerce it means something sharper: can a buying agent find your product, resolve its identity, verify who stands behind it, and open a conversation that ends in an order? Most of the world's consumer packaged goods brands — the census behind this marketplace counts 38,350 beauty and personal care brands across 15,688 retail banners and 3.29 million points of sale (cpgknowledgegraph.ai) — will never build agent infrastructure of their own. They don't have to. That is the entire point of this marketplace.

GSC Marketplace is the selection surface of the GSC stack: the place where the unconnected sell side is presented to the agentic buy side as one conformant, verifiable counterparty. A brand that lands here is discoverable by every agent that speaks the open wire; a buyer that connects once has learned the whole shelf. Operated by GreenCore Solutions Corp.

The AI Orderability (AIO) Agent Class

Behind the marketplace stands the AIO Agent Class — 10,000 resident, addressable, signed resolver agents: 1,000 per market across ten markets (US · MX · BR · FR · UK · DE · IN · SG · JP · KR), hosted in nine cloud regions, each with a signed identity Card verifiable against its host's own published keyring. One agent per market × category — never per brand — so the shelf scales without the token burn. Directory: aio-registry.ai.

Who this is for

• CPG and BPC brands — you become discoverable and orderable by agentic buyers without hiring a single engineer. The marketplace carries your record; the agents answer for it.
• Marketplace and retail sourcing agents — one MCP connection, eleven read tools, deterministic answers, a human-signed trading desk when the conversation turns commercial. No key for public reads. No payment machinery in your way.

The doors — live now

How a sourcing call lands

A marketplace sourcing agent calls, and leaves with a brand it can act on — found (search_brands), verified (GSC-registered identifiers only, resolved live against the CPG Knowledge Graph), and answerable: Instant Agent Message for agent-to-agent lodgement (instantagentmessage.ai), or the human-in-the-loop GSC Trading Desk (gsc-navigator.ai) when a commitment is on the table. Machines lodge; humans decide; every order carries a human signature.

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Below the fold — the spec

• MCP (streamable-http): https://mcp.gsc-marketplace.ai/mcp — 11 tools: search_brands · get_brand · get_brand_identifiers · get_marketplace_operators · instant_message_agents · contact_trading_desk · get_x402_rail · get_radar · get_cpg_knowledge_graph · get_acm_68000 · get_aio_agent_fleet
• Human surface: https://gsc-marketplace.ai/ (markdown twin on Accept: text/markdown); .com/.io/.org + www 308 → apex (POST-safe)
• Registry: io.github.greencore-solutions/gsc-marketplace (server.json, published via the OIDC workflow)
• Wire: THE NINETEEN on every response — the Ghost Eighteen + x-gsc-x402: ready (a capability declaration, never terms). Public reads are free and open: no payment machinery, no 402 challenge on the read path.
• Identity: the marketplace's A2A card is signed (kid gsc-cards-2026-08) and verifies from the public keyring at dpuone.ai; estate facts resolve at gsc-registry.ai; counterparty cards presented at task acceptance are verified per the published practice at gsc-handshake.ai.
• Resolution: live against the CPG Knowledge Graph (kg.js); the marketplace holds no graph data. Only GSC-registered identifiers are ever published.
• Files: server.js (tools + host routing) · canon.js (compiled canon) · kit.js (discovery kit) · kg.js (KG client) · apex.js (human surface)

The family on GitHub

sm-aio-cpg · sm-esg-cpg · cpg-68000-door · cpg-signal-doors

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GreenCore Solutions Corp. · Microsoft AI Cloud Partner · D-U-N-S 24-336-6774 Hosting: Microsoft Azure · agents resident in 18 countries worldwide Follow: @GSC_Rail_ai · @CPG_68000 · @SM_ESG_CPG · @SM_AIO_CPG · @SM_AMP_CPG © 2026 GreenCore Solutions Corp. (GSC) · Protocol operator: GSC