MCP Steroid

MCP Steroid is still in an early stage; all public information comes from the author @jonnyzzz's release announcements on X. There are no third-party reviews, tutorials, or community discussions. While the repository includes documentation and release notes, no user success stories or in-depth tests have been shared. Given the lack of independent validation, developers should trial it in non-critical projects before considering it for production use.

The tool starts an MCP server inside IntelliJ and gives AI agents access to the full IDE API: typed refactorings, static inspections, the debugger, PSI/AST operations, and more. Unlike ordinary MCP tools that only read and write files, it allows agents to make semantic code changes, avoiding the need for repeated correction loops. For example, an agent can safely rename symbols, extract methods, or apply auto-fixes from inspections—useful for batch refactoring or deep code analysis.

Requirements include a licensed IntelliJ-based IDE, the plugin installation, and a connection via the devrig CLI. Setup has been simplified to a single command that bundles Java 25, supporting macOS and Linux (Windows not mentioned).