# Checkout

Checkout is an out-of-the-box checkout solution that offers merchants a straightforward to implement, and conversion efficient way to add a checkout system to their shopper experiences.
Additionally, it provides you the flexibility to support existing and future channels, and the speed to convert new sales opportunities.

Checkout supports two modes:

- Complete Checkout mode to create and customize the entire checkout experience with Checkout.
- Payment Only mode to keep an existing checkout flow but accept payments using the Checkout payment functionality.

Checkout includes everything required to provide the checkout functionality, such as infrastructure, [APIs](/checkout/payment-intents-api.md), as well as the client [SDK](/checkout/browser-sdk.md). Integrations with third-party services, such as payment service providers, can be configured through [commercetools Connect](/connect).

## Get started with Checkout

- **[Overview](/checkout/overview.md)**

  Get a better understanding of Checkout.

- **[Develop with Checkout](/learning-implement-checkout/implement-commercetools-checkout/overview.md)**

  Take our self learning module on Checkout.

## Set up and personalize Checkout

- **[Configure Checkout](/checkout/configuring-checkout.md)**

  Configure Checkout settings.

- **[Integrate Checkout](/checkout/installing-checkout.md)**

  Integrate Checkout with web applications.

- **[Customize Checkout](/checkout/customizing-checkout.md)**

  Customize your checkout experience.

## Navigation

- General
  - [Checkout overview](/checkout/overview.md)
  - [Hosts and authorization](/checkout/hosts-and-authorization.md)
  - [Checkout Links best practices](/checkout/checkout-links.md)
- Configuration
  - [Configure Checkout](/checkout/configuring-checkout.md)
  - [Permissions and Subscription](/checkout/permissions-subscription.md)
  - [Connectors and Applications](/checkout/connectors-and-applications.md)
  - [Payment predicates](/checkout/payment-integration-predicates.md)
  - [Stored Payment Methods](/checkout/stored-payment-methods.md)
- Integration
  - [Integrate Checkout](/checkout/installing-checkout.md)
  - [Checkout Browser SDK](/checkout/browser-sdk.md)
  - [Checkout Events](/checkout/checkout-events.md)
  - [Checkout Messages](/checkout/messages.md)
- Customization
  - [Customize Checkout](/checkout/customizing-checkout.md)
  - [Customize the style of Checkout](/checkout/custom-style.md)
  - [Customize the texts and labels of Checkout](/checkout/custom-texts-labels.md)
  - [Customize the address forms of Checkout](/checkout/custom-address-forms.md)
  - [Customize the address fields validation of Checkout](/checkout/custom-address-fields-validation.md)
  - [Customize Payment Integrations](/checkout/payment-integrations-customization.md)
- Payments
  - [Payment lifecycle](/checkout/payments-lifecycle.md)
- Checkout APIs
  - API fundamentals
    - [General concepts](/checkout/general-concepts.md)
    - [Common API data types](/checkout/common-types.md)
    - [Errors](/checkout/errors.md)
    - [Limits](/checkout/limits.md)
    - [Scopes](/checkout/scopes.md)
  - [Checkout Applications API](/checkout/applications-api.md)
  - [Checkout Payment Integrations  API](/checkout/payment-integrations-api.md)
  - [Checkout Payment Intents API](/checkout/payment-intents-api.md)
  - [Checkout Transactions API](/checkout/transactions-api.md)

## Related pages

- [Search documentation and API specs](/search.md)