MaStR MCP Server

Plugs Claude directly into Germany's Marktstammdatenregister, the federal energy plant registry run by Bundesnetzagentur. You get 21 tools split between authenticated SOAP endpoints and public JSON searches. Query wind turbines by postcode and capacity range, pull full unit details with EEG and storage data, search gas production facilities, filter grid connection points by voltage level, or track market actors and balancing areas. Supports 10 filter operators (contains, starts with, greater than, null checks) and recognizes all 20 energy carrier types from solar to hydrogen. Credentials unlock the full SOAP API with delta syncs and catalog lookups, but seven public search tools work immediately without registration. Built for energy analysts and researchers who need programmatic access to Germany's 3+ million registered energy market entries.