> For the complete documentation index, see [llms.txt](https://docs.zaui.com/zapi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zaui.com/zapi/appendix.md).

# Appendix

- [Activity Type IDs](https://docs.zaui.com/zapi/appendix/activity-type-ids.md)
- [Error Codes](https://docs.zaui.com/zapi/appendix/error-codes.md)
- [Package Type IDs](https://docs.zaui.com/zapi/appendix/package-type-ids.md)
- [Product Type IDs](https://docs.zaui.com/zapi/appendix/product-type-ids.md)
- [Payment Method Type IDs](https://docs.zaui.com/zapi/appendix/payment-method-type-ids.md)
- [User Type IDs](https://docs.zaui.com/zapi/appendix/user-type-ids.md)