Grocery MCP

A dedicated MCP and REST service that searches grocery retailers directly and returns reviewable product links. It starts with:

• Kettle Range Meat Co. — Milwaukee and Elm Grove
• Outpost Natural Foods — Capitol Drive, State Street, Bay View, and Mequon

This service does not add products to carts, place orders, store retailer credentials, or handle payment. Every response explicitly reports cart_prefilled: false; the user opens the links, adds products, and checks out on the retailer's own site.

Setup

python3.12 -m venv .venv
source .venv/bin/activate
pip install -e ".[dev]"

Run

python -m grocery_mcp.server
python -m grocery_mcp.server --http

HTTP endpoints:

• MCP: http://localhost:8080/mcp
• Health: http://localhost:8080/health
• OpenAPI: http://localhost:8080/docs
• Retailers: http://localhost:8080/v1/retailers
• Product search: http://localhost:8080/v1/products/search
• Handoffs: POST http://localhost:8080/v1/handoffs

When DATABASE_URL is configured, handoffs and OAuth dynamic client registrations are persisted in PostgreSQL. Without it, local development uses process memory.

MCP tools

• find_grocery_retailers
• search_grocery_products
• create_grocery_handoff
• get_grocery_handoff
• create_grocery_order_template
• list_grocery_order_templates
• create_handoff_from_template

Example handoff input:

{
  "retailer": "kettle_range",
  "location_id": "milwaukee",
  "items": [
    {"name": "boneless chicken thighs", "quantity": 2, "unit": "lb"},
    {"name": "ground beef", "quantity": 1, "unit": "lb"}
  ]
}

Data behavior

Product names, prices, availability, and links come from each retailer's public customer storefront at request time. These storefront interfaces are not formal partner APIs and can change without notice. Responses include match confidence, alternatives, and observation timestamps so clients can make this uncertainty visible.

Matching requires strong token overlap, rejects obvious cross-category substitutions, and prefers available products. If no safe result exists, the item is explicitly unmatched rather than replaced with a loosely related item.

Reusable templates persist the retailer, location, and normalized grocery items. Running a template always performs fresh catalog searches and creates a new review-only handoff.

Tests

ruff check .
pytest