Tidewave Rails: MCP server, setup and security

What Tidewave Rails does

According to its repository: “Runtime-level MCP server for Rails development: run code, read logs, query the DB, read docs.”

The Model Context Protocol (MCP) is a standard plug between an AI agent and an outside service: once the server is connected, its tools show up in the agent, which decides when to call them. Tidewave Rails is listed under Code execution, a category of 32 servers in the directory, where it ranks #5 by stars.

Installing and connecting Tidewave Rails

No package or remote server is declared in the official MCP registry: you install it from source, following the repository README.

It works with any MCP-compatible client (Claude Desktop, Claude Code, Cursor, VS Code, Codex and most recent agents). You add one entry to the client's MCP configuration: server name, start command or URL, environment variables. Project language: Ruby.

Security: what to check

Connecting an MCP server means installing software that talks straight to your agent: it runs with your rights and the model trusts its tool descriptions. The risk therefore depends on what it can touch and how far its code can be trusted.

Points found for Tidewave Rails:

• System access: the Code execution category gives the agent control over files, a terminal, code or a browser. A booby-trapped instruction in content the agent reads (prompt injection) can then turn into an action.

Good practice: grant only the rights needed (least privilege), require human approval for irreversible actions, and run the AI agent security check.

Project activity and maintenance

Created on April 11, 2025, the tidewave-ai/tidewave_rails repository has 476 stars and 30 forks, with 2 open issues. It has more stars than 87% of the servers in the directory. Last change 1 month ago. Version published in the registry: 0.8.0 (July 24, 2026).

Stars measure attention, not quality: a recent, heavily promoted project can collect them fast, while a useful but niche server will have few.