Developed a unified metrics API integration for tariff pricing within the evcc-io/evcc repository, focusing on consolidating pricing data retrieval through Pstryk. This work centralized tariff calculation metrics, improving both the accuracy and consistency of pricing data used by the application. The implementation involved careful API integration and data processing, leveraging YAML configuration to standardize the API contract and enhance error handling. By streamlining the data paths and establishing a more reliable foundation, the changes positioned the project for future tariff feature expansions. Throughout the process, clear commit messaging and disciplined version control practices were maintained to ensure traceability.