mcp-a2a-ap2-im-hungry 🍔💳

MCP server with A2A protocol (food delivery) + AP2 protocol (payments with Mandates).

Demo

AP2 Demo

Flow

AP2 Flow

Quick Start

git clone https://github.com/tas1337/mcp-a2a-ap2-im-hungry.git
cd mcp-a2a-ap2-im-hungry
npm start

Services:

MCP Server: http://localhost:8000/mcp
Registry: http://localhost:8004
DoorDash/UberEats/Grubhub: 8001-8003 (A2A)
Stripe: http://localhost:8005 (AP2)

What's Different from mcp-a2a-im-hungry?

mcp-a2a-im-hungry	This project
A2A only	A2A + AP2
No payments	Stripe payments
—	Mandates (signed authorization)

What is AP2?

Problem: AI agents spending money. Who approved it?

AP2 = Payments with Mandates — cryptographically signed proof of user intent.

MANDATE = { userId, maxAmount, expires, signature }

Flow (matches real-world AP2):

User asks for cheeseburger 🍔
Your agent searches restaurants via A2A (discovers DoorDash/UberEats/Grubhub agents)
Your agent gets menus and delivery estimates
Your agent decides which restaurant (cheapest/fastest)
User authorizes payment → User's authorization service creates mandate (signed with user's private key)
Your agent requests authorization → Receives mandate from user
Your agent sends payment request WITH mandate to Stripe agent (via A2A)
Stripe agent VERIFIES mandate (signature valid? not expired? amount ok?)
If valid → Stripe processes payment ✅
Your agent places order with food delivery agent (DoorDash/UberEats/Grubhub via A2A)
🍔 Burger incoming!

Key Point: The agent NEVER creates mandates. User authorization creates them. Agent only uses them.

Project Structure

src/
├── a2a-client.ts          # Calls ANY agent (food or Stripe)
├── tools.ts               # Food tools
├── ap2-tools.ts           # Payment tools (requests user authorization)
├── user-authorization.ts  # User creates mandates (real-world: wallet/auth service)

mock-agents/
├── food-delivery/    # DoorDash, UberEats, Grubhub
├── payments/         # Stripe (verifies mandates!)
└── registry/         # Agent discovery

Tools

Tool	Description
`search_restaurants`	Search food (A2A)
`get_menu`	Get menu (A2A)
`place_order`	Order food (A2A)
`process_payment`	Pay via Stripe (AP2 + Mandate)
`process_refund`	Refund via Stripe (AP2 + Mandate)

Connect to Cursor

{
  "mcpServers": {
    "mcp-a2a-ap2-im-hungry": {
      "url": "http://localhost:8000/mcp"
    }
  }
}

MCP A2A AP2 Food Delivery & Payments