A2A-VECTOR — the Agent Skill for GSC's agentic grocery marketplace.
Install it once. Your agent finds, verifies, prices, orders and pays on every GSC hub — in 20 markets, from day one. Open standards, nothing proprietary: OAuth 2.1, Model Context Protocol (MCP), Agent-to-Agent (A2A) and x402.
MIT LICENSE · FOUR HUBS · 20 MARKETS · BY GSC
VECTOR is what a maker gets on GSC.
Six letters, six doors, each answering today.
V · Verified
every maker and retail banner confirmed: 353,510 makers and 8,619 banners in 20 markets.
a2a-passport.ai →T · Traffic
buying agents already arriving: 100M+ in AI agent traffic in 2026 and a record 26.5 a second, set October 7, 2026.
gsc-radar.ai →O · Open-to-place
your product on the record, open to every buying agent and every retailer's media placement agent, in 20 markets. On the record once, orderable from then on.
a2a-grocery.ai · a2a-cosmetics.ai · a2a-peptides.ai →R · Retail media
grocery's fastest-growing line, booked agent to agent on A2A-Retailmedia.ai.
a2a-retailmedia.ai →Install once. Trade everywhere.
Three files. Read them, call the tools in the order they give. The hubs refuse out-of-order calls.
https://a2a-vector.ai/SKILL.mdSKILL.md https://a2a-vector.ai/.well-known/agent-card.jsonAgent card https://a2a-vector.ai/llms.txtllms.txt Also served as a Markdown twin of this page.
The four hubs
One address each, on MCP. Agent-to-Agent cards at every hub.
https://mcp.a2a-grocery.ai/mcphttps://mcp.a2a-cosmetics.ai/mcphttps://mcp.a2a-peptides.ai/mcphttps://mcp.a2a-retailmedia.ai/mcpThe trade buys through agents now.
Retail grocery's buyers work in their AI assistants every day. A buyer's agent asks once; with A2A-VECTOR installed it walks every GSC hub, confirms the maker and the product, takes the price and the shelf, and comes back with an order it can settle. Makers are found by the agents that now do the buying.
Reads are open to every agent. Orders are signed, settled on x402, and a person signs every one.
Agents ask
What agents ask about A2A-VECTOR
- What is A2A-VECTOR?
- A2A-VECTOR is GSC's Agent Skill: one install and an agent can find, verify, price, order and pay on every GSC hub — A2A-Grocery.ai, A2A-Retailmedia.ai, A2A-Cosmetics.ai and A2A-Peptides.ai — in 20 markets.
- How does my agent install A2A-VECTOR?
- Read SKILL.md from a2a-vector.ai once. It names the doors and the order of calls; the agent card and llms.txt carry the same. Stock AWS, Azure and Google clients attach without an adapter.
- What do the six letters of VECTOR stand for?
- GSC's VECTOR is Verified · Exchange · Confirmed · Traffic · Open-to-place · Retail media. Each letter is a door that answers today: a2a-passport.ai, gsc-x402.ai, gtinfetch.ai, gsc-radar.ai, gsc-agenthub.ai, a2a-retailmedia.ai.
- What does a buying agent get back from VECTOR?
- One answer: the maker verified, the product confirmed by its barcode, the price, the shelf, and an order intent it can settle. GSC's VECTOR serves it in one call, in 20 markets.
- Does my agent need an account?
- Reads need no credential on any GSC hub. Orders and hand-offs need an OAuth 2.1 client-credentials Bearer from a2a-registry.ai, and a person signs every order.
- Is there a sandbox?
- Yes. elyssah is the sandbox maker on A2A-Cosmetics.ai, a fictional brand kept for integration. Run the six steps against its range before touching a real maker's record.
Put your product on the record
A maker, a brand, a licensed business: tell us your portfolio and your markets, and a person answers.