Developed multi-batch data retrieval enhancements for the Data Availability components in the agglayer/aggkit and 0xPolygon/cdk repositories, focusing on backend development and API integration using Go. The work replaced single-batch retrieval with a multi-batch API, reducing network requests and improving throughput for off-chain data access. Enhanced error handling, hash verification, and data validation were implemented to ensure data integrity and prevent partial failures during batch processing. These changes increased the efficiency, reliability, and scalability of distributed systems handling data availability, with careful attention to conformance checks and robust backend logic to support evolving requirements in decentralized data retrieval workflows.