# Flex Bundles

> Flex Bundles is a native Shopify bundle app for high-volume brands whose bundles are too custom for templated bundle apps. Bundles are added to the cart through Shopify's Cart API with line item properties and expanded by a Cart Transform Function, so they flow through checkout and fulfillment as real line items with accurate pricing and inventory.

Flex Bundles supports three bundle types:

- **Fixed**: pre-set components attached to a parent variant. Adding the parent to the cart includes the components automatically, with no theme code.
- **Flex**: customer-built bundles (build your own, mix and match). The storefront adds the parent with a `_components` line item property listing the selected variants. Priced by parent price (with an optional `_discount`) or by the sum of component prices.
- **Free (gift with purchase)**: a free line item flagged `_is_free: true`. Requires Shopify Plus.

Each docs page below is also available as plain Markdown by adding `.md` to its URL. The full docs are in one file at https://flexbundles.com/llms-full.txt.

## Docs

- [Getting Started](https://flexbundles.com/docs.md): Install Flex Bundles and get your first bundle live on your Shopify store.
- [Bundle Types](https://flexbundles.com/docs/bundle-types.md): The three bundle types in Flex Bundles: fixed bundles, flex bundles, and free (gift with purchase) bundles.
- [Customization](https://flexbundles.com/docs/customization.md): Learn how to customize Flex Bundles to match your brand with theme integration.
- [Cart API Integration](https://flexbundles.com/docs/cart-api-integration.md): Learn how to add flex bundles to the cart using Shopify's Cart API with line item properties.
- [Bundles Admin API](https://flexbundles.com/docs/admin-api.md): Create, update, and delete flex, fixed, and free bundles programmatically with the Flex Bundles Admin API.
- [Exporting Your Data](https://flexbundles.com/docs/exporting-data.md): Get bundle performance data out of Flex Bundles: CSV exports, the Analytics API, and order-level exports for warehouses and dashboards.
- [MCP Server](https://flexbundles.com/docs/mcp-server.md): Connect Claude Code, Cursor, and other AI coding tools to Flex Bundles so they can create bundles and build storefront bundle code from your real setup.

## Product

- [Pricing](https://flexbundles.com/pricing): Four flat monthly plans, every feature on all of them.
- [FAQ](https://flexbundles.com/faq): Bundle types, pricing logic, checkout and fulfillment, plans and billing, developer integrations, and switching from another app.
- [Examples](https://flexbundles.com/examples): Live Shopify bundles built on Flex Bundles, and how fixed and flex bundles differ.
- [Case studies](https://flexbundles.com/case-studies): How Shopify brands use Flex Bundles to grow average order value and build custom bundle experiences.
- [Changelog](https://flexbundles.com/changelog): Latest updates, features, and fixes.
- [About](https://flexbundles.com/about): Who makes Flex Bundles.
- [Book a demo](https://flexbundles.com/demo): Talk to the team about your bundles.

## Optional

- [Blog](https://flexbundles.com/blog): Guides, mechanics, and product updates for teams building bundles on Shopify.
- [Shopify App Store listing](https://apps.shopify.com/flex-bundles): Install Flex Bundles.