Apollo Federation has introduced Extended Error Diagnostics in GraphOS Studio, designed to enhance error handling capabilities for GraphQL APIs by providing a standardized framework for error classification and diagnosis. This new feature addresses a gap in error taxonomy compared to traditional REST APIs, where HTTP status codes are commonly used. In a federated GraphQL environment, a single request can generate multiple errors from various services, complicating error tracking. The Extended Error Diagnostics feature integrates with Apollo's existing tooling to provide actionable insights, allowing developers to quickly identify and address errors by categorizing them with specific error codes and service identifiers. This enables teams to understand whether issues stem from client queries, schema misconfigurations, or underlying services. The diagnostics tools in Apollo Studio allow users to view error rates, filter by service or code, and analyze specific operations and traces, fostering a more proactive approach to API health. The system supports predefined and customizable error codes, and integrates with OpenTelemetry for comprehensive error monitoring, offering a powerful solution for managing errors in GraphQL APIs.