Alexey Krasnoperov developed a standardized JSON-RPC API specification for Filecoin nodes in the filecoin-project/FIPs repository, focusing on interoperability and consistency across node providers. He authored the FRC-0104 spec using Rust and Markdown, integrating OpenRPC-based documentation and a synchronization script to align Markdown with the JSON schema. In the ChainSafe/forest repository, Alexey updated RPC API documentation and usage guidelines to reflect a high-performance RPC API, clarifying method references and improving onboarding for developers. His work emphasized API design, protocol specification, and documentation quality, providing a reusable foundation for downstream tooling and reducing integration risk across the ecosystem.