# A3 — E-commerce automation

> Transact without waiting for an API. A3 learns checkout from the live website and exposes a transactional REST API or UCP.

**URL:** https://athree.dev/use-cases/e-commerce/  
**Canonical markdown:** https://athree.dev/use-cases/e-commerce.md

## Problem

Aggregators need bookable inventory. Suppliers need distribution. Most commerce still lives on websites without stable partner APIs. Building and maintaining scrapers or always-on LLM agents does not scale cleanly.

## Approach

A3 learns real booking / checkout journeys (hotels, flights, retail, and other verticals), writes deterministic stages, and exposes them as APIs — including [UCP](https://athree.dev/ucp.md) for agent commerce.

## Outcomes

- Faster partner onboarding without waiting for an API roadmap
- Lower run cost than LLM-in-the-loop checkout
- Self-heal when merchant UIs change

## Related

- UCP: https://athree.dev/ucp.md
- Datasets: https://athree.dev/use-cases/datasets.md