Order sandwiches from a Brooklyn deli via AI agent — pay with MPP on Stripe, pick up in person.
What it does
Prospect Butcher Co is an agent-powered sandwich shop API in Brooklyn, NY. AI agents can browse the menu, chat with the PBC Agent for recommendations, and purchase sandwiches for physical pickup — all over plain HTTP with no browser or checkout page required. Payments are settled via MPP (Machine Payments Protocol) on Stripe card rails.
The endpoint `/buy/:slug` returns a 402 Payment Required response with an MPP challenge when called. The agent resolves the payment challenge (via Stripe), receives an order confirmation with a pickup code, and the human picks up the sandwich at the counter. The menu includes items like Turkey & Bacon Jam ($15), PBC Roast Beef ($15), Chicken Salad ($14), Korean BBQ ($16), Boudinwich ($16), Chopped Liver ($12), Housemade Ham ($15), and Rolled Beef ($15).
Additional endpoints include GET /menu for the full menu, POST /chat to interact with the PBC Agent assistant, and /llms.txt for full agent instructions. The service was designed for a specific pickup event (Friday March 20) in Prospect Heights & Greenpoint, Brooklyn. Availability may be limited to scheduled pop-up dates.
Capabilities
Use cases
- —AI agent autonomously orders lunch for a user and provides a pickup code
- —Agent browses menu and gets personalized sandwich recommendations via /chat
- —Demonstrating real-world physical commerce initiated entirely by an AI agent
- —Building agent workflows that include food ordering as a capability
Fit
Best for
- —AI agents that need to make real-world food purchases on behalf of users
- —Developers exploring MPP (Machine Payments Protocol) on Stripe rails
- —Demonstrating end-to-end autonomous agent commerce with physical fulfillment
Not for
- —Users outside Brooklyn who cannot pick up in person
- —Agents needing always-available ordering — this appears tied to specific pop-up dates
- —High-volume or programmatic bulk food ordering
Quick start
# 1. Read agent instructions
curl https://agents.prospectbutcher.shop/llms.txt
# 2. Browse the menu
curl https://agents.prospectbutcher.shop/menu
# 3. Purchase a sandwich (returns 402 MPP challenge)
curl https://agents.prospectbutcher.shop/buy/turkey-bacon-jam?qty=1Endpoint
Quality
The endpoint returned 404 on HEAD/GET probe (likely requires a valid slug and possibly a specific HTTP method or active menu period), so no 402 challenge was captured. Documentation is inferred from the landing page, ai-plugin manifest, and error hints. No OpenAPI schema or llms.txt content was crawled. Pricing is clear from the menu but the MPP challenge structure is not directly observed.
Warnings
- —Probe returned 404 — the /buy/:slug endpoint may require a valid sandwich slug or may only be active during scheduled pickup events
- —No 402 MPP challenge was captured during probing; endpoint liveness unconfirmed
- —Menu and pickup availability appears tied to specific dates (March 20) — may not be currently active
- —No OpenAPI schema or llms.txt content was captured in the crawl bundle
Citations
- —Payments are settled via MPP on Stripe card railshttps://agents.prospectbutcher.shop
- —The endpoint /buy/:slug returns 402 Payment Required with an MPP challengehttps://agents.prospectbutcher.shop
- —Menu items range from $12 to $16https://agents.prospectbutcher.shop
- —Pickup is in Prospect Heights & Greenpoint, Brooklyn, NYhttps://agents.prospectbutcher.shop
- —POST /chat talks to the PBC Agent for recommendations; GET /menu returns the menuhttps://agents.prospectbutcher.shop/docs
- —Description for model states: Agent-powered sandwich shop API with POST /chat and POST /order endpointshttps://agents.prospectbutcher.shop