> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://ixopay.ferndocs.com/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://ixopay.ferndocs.com/_mcp/server.

# Appendix

The Appendix section is where you can find additional information and resources related to our documentation. This section contains supplementary material that complements the content in other sections, such as error codes. The information in this section is organized to make it easy to find what you need. Feel free to browse through and discover all the resources available to you.

#### [Error codes](https://documentation.ixopay.com/docs/reference/appendix/error-codes)

Complete listing of platform error codes and messages grouped by phase: general, network, payment, post-processing, schedule, and status errors.

#### [Regions](https://documentation.ixopay.com/docs/reference/appendix/regions)

Every IXOPAY gateway region and its hostnames: admin interface, production and sandbox APIs, PCI endpoints and Business Intelligence data sources.