> For the complete documentation index, see [llms.txt](https://halo-dot-developer-docs.gitbook.io/halo-dot/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://halo-dot-developer-docs.gitbook.io/halo-dot/sdk.md).

# SDK

- [Accessing the SDK](https://halo-dot-developer-docs.gitbook.io/halo-dot/sdk/1.-getting-started.md): The purpose of the SDK is to process payment, whilst you embed it in your current working application.
- [SDK Mobile Integration Guide](https://halo-dot-developer-docs.gitbook.io/halo-dot/sdk/2.-sdk-integration-guide.md)
- [Halo System Baseline](https://halo-dot-developer-docs.gitbook.io/halo-dot/sdk/halo-system-baseline.md): This README provides guidance on the installation and execution of the Halo.SDK with a host Android application.
- [Branding Guidelines](https://halo-dot-developer-docs.gitbook.io/halo-dot/sdk/branding-guidelines.md)
- [Mastercard](https://halo-dot-developer-docs.gitbook.io/halo-dot/sdk/branding-guidelines/mastercard.md)
- [Android SDK](https://halo-dot-developer-docs.gitbook.io/halo-dot/sdk/branding-guidelines/mastercard/android-sdk.md)
- [Steps to Integrate](https://halo-dot-developer-docs.gitbook.io/halo-dot/sdk/branding-guidelines/mastercard/android-sdk/steps-to-integrate.md)
- [Step 1: Initialise](https://halo-dot-developer-docs.gitbook.io/halo-dot/sdk/branding-guidelines/mastercard/android-sdk/steps-to-integrate/step-1-initialise.md)
- [Step 2: Prepare](https://halo-dot-developer-docs.gitbook.io/halo-dot/sdk/branding-guidelines/mastercard/android-sdk/steps-to-integrate/step-2-prepare.md)
- [Step 3: Play](https://halo-dot-developer-docs.gitbook.io/halo-dot/sdk/branding-guidelines/mastercard/android-sdk/steps-to-integrate/step-3-play.md)
- [Step 4: Review](https://halo-dot-developer-docs.gitbook.io/halo-dot/sdk/branding-guidelines/mastercard/android-sdk/steps-to-integrate/step-4-review.md)
- [Android Reference App](https://halo-dot-developer-docs.gitbook.io/halo-dot/sdk/branding-guidelines/mastercard/android-sdk/android-reference-app.md)
- [Code and Formats](https://halo-dot-developer-docs.gitbook.io/halo-dot/sdk/branding-guidelines/mastercard/android-sdk/code-and-formats.md)
- [Visa](https://halo-dot-developer-docs.gitbook.io/halo-dot/sdk/branding-guidelines/visa.md)
- [Android SDK](https://halo-dot-developer-docs.gitbook.io/halo-dot/sdk/branding-guidelines/visa/android-sdk.md)
- [Step 1: Prerequisite](https://halo-dot-developer-docs.gitbook.io/halo-dot/sdk/branding-guidelines/visa/android-sdk/step-1-prerequisite.md)
- [Step 2: Integration](https://halo-dot-developer-docs.gitbook.io/halo-dot/sdk/branding-guidelines/visa/android-sdk/step-2-integration.md)
- [Step 3: Integrations (Optional)](https://halo-dot-developer-docs.gitbook.io/halo-dot/sdk/branding-guidelines/visa/android-sdk/step-3-integrations-optional.md)
- [Appendix](https://halo-dot-developer-docs.gitbook.io/halo-dot/sdk/branding-guidelines/visa/android-sdk/appendix.md)