> For the complete documentation index, see [llms.txt](https://smartpossdk.gitbook.io/paywizard-open-api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://smartpossdk.gitbook.io/paywizard-open-api/semi-integration/internal-integration.md).

# Internal Integration

- [Payment App AIDL Integration Protocol](https://smartpossdk.gitbook.io/paywizard-open-api/semi-integration/internal-integration/payment-app-aidl-integration-protocol.md)
- [AIDL Integration Best Practice](https://smartpossdk.gitbook.io/paywizard-open-api/semi-integration/internal-integration/aidl-integration-best-practice.md)