How to Build a Custom Ecommerce Store with Thor Commerce and AI

Headless commerce is a modern approach to building an ecommerce storefront. It separates the commerce engine from the customer-facing experience, allowing developers to create a custom storefront while keeping the backend streamlined and efficient. Thor Commerce is a headless commerce platform that simplifies this process for businesses of all sizes.

With Thor Commerce, developers have access to two GraphQL APIs: the Admin API for managing products, prices, inventory, and other backend operations, and the Storefront API for handling buyer-facing features like product discovery, cart, checkout, and customer account management. This separation is crucial for businesses that sell to both customers and other businesses through different channels and regions.

One of the key advantages of Thor Commerce is its ability to handle commerce contextually. The same product can have different availability, pricing, and other attributes depending on the store, country, currency, and other factors. This contextual commerce feature ensures that customers see the most accurate and relevant information for their specific situation.

The tutorial provided focuses on creating a custom storefront using Thor Commerce, Next.js, and an AI coding agent. The AI agent, such as Claude Code, Codex, or Cursor, is used to assist with the development process by reading the relevant documentation, code, and API skills provided by Thor Commerce. This approach helps ensure that the code changes are accurate, safe, and aligned with the commerce backend.

To get started, you'll need to set up your development environment by creating a new repository from the GitHub template or cloning the public reference implementation. Make sure to have the necessary prerequisites installed, including Node.js 20.9 or newer, pnpm, Git, and an AI coding agent that can read and edit your local repository.

Once your environment is set up, follow the step-by-step instructions provided in the tutorial. The first step involves creating your storefront by cloning the reference implementation and installing the required dependencies. Before making any changes, it's essential to read the AGENTS.md file, which provides guidance on how to interact with Thor Commerce's Admin and Storefront APIs using the included skills.

The tutorial then guides you through mapping the repository's architecture, explaining where different components, such as product queries, product pages, cart actions, checkout, customer authentication, and market configuration live. This architectural overview helps you understand the structure of the project and where to focus your changes.

After familiarizing yourself with the repository's structure, the tutorial proceeds to connect your storefront to Thor Commerce by copying the example environment file and adding your project-specific values. These values include your Thor project identifier and any other necessary credentials. It's crucial to keep these sensitive values secure and not to include them directly in your prompts to AI agents.

Once your storefront is connected to Thor Commerce, you can begin customizing the storefront using the AI coding agent. The agent will leverage the typed GraphQL contracts, task-oriented documentation, and agent-ready sources provided by Thor Commerce to make changes to the code. By following the guidance in the AGENTS.md file and the relevant Thor Commerce Storefront API skills, you can safely and effectively modify the storefront to meet your specific requirements.

Throughout the process, the tutorial emphasizes the benefits of using Thor Commerce with an AI coding agent. The combination of Thor's strong boundaries, reliable source of truth, typed GraphQL contracts, and task-oriented documentation creates a safe and efficient development environment. By dividing the labor between you (defining the experience and business outcome) and the AI agent (reading the relevant contract, changing the code, and proving the result with lint, build, and browser checks), you can create a custom ecommerce storefront with confidence and agility.