The NASA PDS MCP server provides access to the NASA PDS Registry API through FastMCP, enabling human-in-the-loop agentic search and exploration of PDS data products, bundles, and collections via a simple interface. It directly integrates with the PDS Registry API to allow users to search missions, projects, celestial bodies, spacecraft, instruments, and data collections, as well as retrieve detailed product metadata using URN identifiers. The server is intended to support the Planetary Data Science community by making NASA PDS data more discoverable, enabling researchers to find relationships among missions, targets, instruments, and data products, and to access categorized reference data for filtering and discovery. The project is open-sourced to encourage collaboration and ease of access to PDS data for future research. Example usage includes conversational queries that can request URNs and metadata, enabling iterative, human-guided exploration of NASA data assets. The project provides installation and usage instructions for running the MCP server standalone and demonstrates configuration for MCP clients.