The C++ MCP Server provides semantic analysis of C++ codebases using libclang. It enables Claude and other LLM-driven assistants to understand code structure without grep or text matching by offering project-wide search and precise symbol data. Core capabilities include searching for classes and functions by patterns, retrieving detailed class information (methods, members, inheritance), and obtaining function signatures with parameter types. It also supports symbol queries within specific files, retrieving complete inheritance hierarchies, and discovering derived classes. Advanced call graph features let you find all callers and callees of a function, as well as call paths between functions. The server caches parsed ASTs for faster repeated queries and supports incremental analysis, making it suitable for large codebases. Setup relies on Python 3.9+, libclang, and an optional portable libclang download, with configuration options to exclude directories, ignore file patterns, and control dependency analysis. The server integrates with Claude Code and Codex CLI via standard mcpServers definitions, enabling indexing, querying, and navigation of C++ projects from within conversations or CLI prompts.