Workflow Example: Cross-Service Orchestration

An e-commerce scenario with three services (Inventory, Orders, Notifications) that demonstrates how AI agents orchestrate multi-step workflows across services — no glue code, no workflow engine.

The Workflow

When a user says "Order a ThinkPad for alice and send her a confirmation", the agent figures out the steps:

1. InventoryService.Search     → Find the product
2. InventoryService.CheckStock → Verify availability
3. InventoryService.ReserveStock → Decrement inventory
4. OrderService.PlaceOrder     → Create the order
5. NotificationService.Send    → Email confirmation

No code connects these steps — the agent reads the tool descriptions and chains the calls itself.

Run

go run .

Services

Example Prompts

Try these with Claude Code (micro mcp serve) or any MCP-compatible agent:

• "What laptops do you have in stock?"
• "Order a ThinkPad for [email protected] and send her a confirmation"
• "Check if 'The Go Programming Language' is available" (it's out of stock!)
• "Order 3 Go Gopher t-shirts for [email protected], reserve the stock, and notify him via Slack"
• "Show me all orders and notifications for alice"

Why This Matters

Traditional approach:

// 50+ lines of glue code wiring services together
func handleOrder(req OrderRequest) {
    product, err := inventoryClient.CheckStock(req.SKU)
    if err != nil { ... }
    if product.InStock < req.Quantity { ... }
    _, err = inventoryClient.ReserveStock(req.SKU, req.Quantity)
    if err != nil { ... }
    order, err := orderClient.PlaceOrder(...)
    if err != nil { ... }
    _, err = notificationClient.Send(...)
    // ...
}

Agent approach:

User: "Order a ThinkPad for alice and confirm via email"
Agent: [reads tool descriptions, chains 5 calls, handles the out-of-stock case]

The agent handles the orchestration. You just write the individual services with good documentation.