A2A Grocery — the agentic hub for retail grocery procurement

Powered by SCHEMA algo for grocery agentic commerce

Agent-to-Agent (A2A) + Model Context Protocol (MCP) hub for retail grocery. Business to business: makers, brand owners, private label, distributors, importers, retailers and their AI agents. Twenty markets on the SCHEMA algo grocery record; ambient, chilled, frozen and fresh; organic, free-from, plant-based, artisan, origin and premium lanes. Call resolve_jurisdiction, then resolve_actor, then gate_transaction before any availability, price, documents, order or handoff tool; those tools refuse without an allow decision. Every record field carries its source page; every response carries notice; every record carries claim_status (listed · claimed · verified). Artificial intelligence makes mistakes. A2A Grocery is an agentic information source, not a recommendation. No ads, ever. No rank for sale. Trade only.

A2A Grocery is built and run by GreenCore Solutions Corp. (github.com/greencore-solutions). This is the public connect kit, MIT.

The door

• Endpoint: https://mcp.a2a-grocery.ai/mcp — any client that speaks streamable-HTTP: { "url": "https://mcp.a2a-grocery.ai/mcp", "transport": "streamable-http" }

• A2A 0.3.0 JSON-RPC: https://a2a-grocery.ai/a2a (the hub) and https://<country code>.a2a-grocery.ai/a2a (one market agent per market, for example fr.a2a-grocery.ai for France)

• Agent Card: https://a2a-grocery.ai/.well-known/agent-card.json (ES256, kid a2ag-2026-10; keyring /.well-known/jwks.json)

• Setup: https://a2a-grocery.ai/setup · Docs: https://a2a-grocery.ai/docs · Support: https://a2a-grocery.ai/support

• Official MCP Registry: io.github.greencore-solutions/a2a-grocery (server.json in this repo)

Related MCP server: PriceAtlas MCP Server

The twenty markets

Europe: France, Germany, Italy, Spain, Poland, UK, Netherlands, Belgium, Switzerland. Americas: United States, Canada, Mexico, Brazil. Asia-Pacific: Japan, South Korea, India, Vietnam, Thailand, Singapore, Australia. Every market is a jurisdiction on the record from day one, on one of fourteen rule sets (the seven European Union markets share one food-law set with national riders).

The gate

Three calls before any price: resolve_jurisdiction → resolve_actor → gate_transaction. Twelve reason codes: ALLOW · REQUIRE_NOTIFICATION · REQUIRE_RESPONSIBLE_PERSON · DENY_NOT_PERMITTED_HERE · DENY_INGREDIENT_BANNED · DENY_INGREDIENT_LIMIT · DENY_CLAIM · DENY_MARKET · DENY_ACTOR_CLASS · DENY_UNLICENSED_AGENT · DENY_NO_GTIN · DENY_NOT_VERIFIED.

The tools

• Gate — resolve_jurisdiction, resolve_actor, gate_transaction

• SKUs — search_cleared_items, get_item, verify_gtin, get_label_and_claims, compare_items

• Chains — find_verified_buyer, find_verified_supplier

• HITL (the auditor and documents lane) — get_product_documents, log_audit

• Economics — get_price, get_availability, create_order_intent, a2a_handoff

• Acts — get_market_status, get_notification_requirements, get_enforcement_watch

Reads are open. The transacting tools take a client-credentials Bearer from the issuer, https://a2a-registry.ai (register at /oauth/register; scope grocery.transact; see https://a2a-grocery.ai/auth.md).

Two worked prompts

Buy side — "Find cleared organic dry pasta suppliers for a discounter in Germany, with certificates and availability."

Sell side — "Which retail buyer desks in France take artisan chilled products, and what does each market require on the label?"

Examples

Stock clients, no adapter: examples/aws_strands.py · examples/azure_semantic_kernel.py · examples/google_genai.py · examples/generic_mcp_client.py; A2A: examples/a2a_aws_strands.py · examples/a2a_azure_agent_framework.py · examples/a2a_google_sdk.py.

Search words

grocery · retail grocery · procurement · supplier · buyer · private label · GTIN · discounter · supermarket · speciality foods · organic · cleared · orderable · AI agent · agent-to-agent · 20 markets · SCHEMA algo · A2A Grocery · agentic hub · Estate AI Agent · GSC Agentic Core

Pay on it

x402 on https://a2a-x402.ai (USDC on Base, settlement after the gate; a refused order intent is not settled and not charged). Front door: https://a2a-pay.ai.

Contact

mcp@a2a-grocery.ai — the registry contact for every listing this hub files. A person reads the form at https://a2a-grocery.ai/support.

Built and run by GreenCore Solutions Corp. Artificial intelligence makes mistakes. A2A Grocery is an agentic information source, not a recommendation. No ads, ever. No rank for sale. Trade only.