Reference Guides

This section provides quick reference materials for developers working with Pay-i. These comprehensive resources help you understand technical details, troubleshoot issues, and find specific information without reading through lengthy guides.

Error Code Reference

The Error Codes reference documents the error codes and messages returned by Pay-i when it encounters problems:

Error code values (stable identifiers for programmatic handling)
Error message values (human-readable diagnostic information)
Organization by API groups
Examples of error codes with their corresponding messages
Guidance on using codes for control flow in your applications

This reference is especially useful when implementing error handling logic that needs to react differently to various error conditions.

Learn more in the Error Codes reference guide.

Header Reference

The Header Cheat Sheet provides a tabular reference of all HTTP headers supported by Pay-i, including:

Header names and their descriptions
Whether headers accept multiple objects (comma-separated lists)
Section categorization for each header
Information about header purpose and usage
Formatting requirements for header values

This comprehensive table-based reference is particularly useful when implementing custom instrumentation that requires specific headers to properly annotate your API calls.

Learn more in the Header Cheat Sheet.

Using These References

These reference guides are designed to be used alongside the implementation guides found in other sections of the documentation:

When implementing Auto Instrumentation, refer to these guides for technical details
When adding Custom Instrumentation, use the header reference to ensure correct format
When Handling Requests, consult the error code reference for proper error handling

As your implementation grows more sophisticated, you'll find these references increasingly valuable for resolving edge cases and optimizing your Pay-i integration.