MaStR MCP Server

MaStR MCP Server is an open-source MCP (Model Context Protocol) server tailored for the German Marktstammdatenregister (MaStR), enabling AI assistants and MCP clients to access, search, and interact with the German energy market master data. It exposes 21 tools (14 SOAP with authentication, 7 public JSON without credentials), supporting advanced searches and detail lookups for power and gas production/consumption units, grid connections, market actors, and more. Designed for energy sector analysts, regulatory bodies, researchers, and developers building MCP-integrated solutions, it facilitates integration with MCP-compatible clients such as Claude Desktop, Cowork, and Claude Code.