Developed and delivered a comprehensive API Troubleshooting Matrix for the documenso/documenso repository, focusing on improving error handling and documentation for envelope, recipient, and webhook integrations. The work involved standardizing global API error responses and providing clear, actionable guidance for common error codes, all documented in Markdown. This approach established a single source of truth for API behavior, streamlining cross-team collaboration and future maintenance. By enhancing the clarity of error documentation, the project reduced onboarding time and support requests, directly benefiting developer experience. The technical focus centered on API development, robust error handling strategies, and precise, accessible documentation practices.