JMRI MCP is a Model Context Protocol (MCP) server: JMRI voice/chat control for DCC model railroads. Because it speaks the Model Context Protocol, AI assistants can use JMRI MCP as a set of callable tools instead of you copy-pasting between apps.
No credentials are required — it works out of the box. The current release is v1.0.0rc4, published under the AGPL-3.0 license, with source at HO44-PROJECT/MrJ-JMRI-MCP on GitHub.
On mcp.site, JMRI MCP sits in the Communication category. Any MCP client can use it — Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed among them — via the install snippets below. If you maintain JMRI MCP for HO44-PROJECT, claim this listing to verify ownership, earn the Verified badge, and keep the details current.