Everything you'd want to know before you install.
A detailed look at how ChatGPT Checkout Module for PrestaShop 8 & 9 – Agentic Commerce Protocol (ACP) works, why we built it the way we did, and the thinking behind the features above.
Sell where your customers discover your products
AI assistants such as ChatGPT, Claude and Perplexity are becoming full purchase points. This module exposes your PrestaShop store through the Agentic Commerce Protocol (ACP), the open standard maintained by OpenAI and Stripe, letting an agent browse your catalogue and complete an order without leaving the conversation.
A conformant implementation, not an approximation
The module implements the five REST endpoints of the Agentic Checkout specification: create, update, retrieve, complete and cancel a session. Every response returns the full cart state (line items, subtotal, taxes, shipping, total, status) expected by the agent platform, with amounts in minor units.
Your store stays the merchant of record
On completion, a real PrestaShop order is created with the customer, addresses, stock decrement, status and emails. Payments stay on your rails: the shared payment token can be charged through Stripe, or handled by your existing PSP.
Security and robustness
Every request is authenticated with a Bearer API key, with optional HMAC signature verification. Sessions are idempotent for safe replay, and order events are pushed to the platform through signed webhooks.
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