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JMRI MCP server

by HO44-PROJECT·io.github.HO44-PROJECT/jmri-mcp·v1.0.0rc4·1 stars
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JMRI voice/chat control for DCC model railroads

B80/100grade B
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Safety scan
B80/100

full report

Adoption
New

1 stars

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Nobody has reviewed JMRI MCP yet.

If you have run it, two minutes of your experience saves the next person an afternoon.

JMRI MCP tools

No tool declarations could be read from the package source. They show once the server is installed.

Public scan report

scanner v0.1.9 · 2026-09-25 · same rubric, same numbers if you re-run it

no findings
  • –Code scanpackage could not be scannedn/a
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitylocal package, no credentials required12/15
  • Maintenancelast push 40 days ago12/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
Overall 80/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How JMRI MCP compares

Against every graded AI and agents MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
80/100
higher than 60% of 4,460 AI and agents servers
GitHub stars
1
more than 50% of 2,711 AI and agents servers

Install JMRI MCP in Claude Code, Cursor or VS Code

The registry entry has no remote endpoint or installable package.

What the publisher says

From the JMRI MCP repository's README, as published. We do not edit it. Read it on GitHub

MrJ JMRI AI Assistant

Version française

License & attribution — please read before reusing this work.

This project is © HO44 PROJECT (MrJ) and licensed under AGPL-3.0-or-later (see LICENSE).

If you redistribute, modify, or republish any part of this project — jmri-core, jmri-cli, jmri-mcp,

the .mcpb/.codex.zip bundles, or the documentation — on this repository or anywhere else (a fork,

another platform, a package registry, a video, a write-up), you must:

- keep the original author credit (MrJ / HO44 PROJECT) and a link back to

this repository, and

- keep the same AGPL-3.0-or-later license on any redistributed or modified version.

Removing or hiding this attribution is not just bad etiquette — under AGPL-3.0 it is a

license violation, and it will be treated as one. See NOTICE.md for details.

Questions or general discussion: use GitHub Discussions.

Bug reports and feature requests: use Issues.

Talk to your model railroad.

Bring AI to your JMRI powered layout. Connect your favorite AI assistant and control your DCC model railroad using natural language through voice or chat.

Drive locomotives, control turnouts, operate signals, manage layout accessories, and more — just by asking.

Compatible with MCP clients such as Claude Desktop, Claude Code, xiaozhi, and other MCP-compatible AI assistants.

Features

MrJ JMRI AI Assistant provides:

  • Ready-to-use package for easy installation
  • Full documentation with setup guides and usage examples
  • A complete MCP (Model Context Protocol) server for JMRI integration
  • A command-line interface (jmri-cli) for direct control, scripting, and automation
  • 52 MCP tools exposing the main JMRI capabilities:
  • Power management
  • Locomotive throttles and functions
  • Roster management
  • Turnouts
  • Sensors
  • Layout lights
  • Signals

See the complete MCP tools reference in mcp-tools.md.

The goal is simple: make advanced JMRI control accessible to every model railroader, from casual operators to automation enthusiasts.

Built on real hardware, not just the JMRI docs

This project was developed against a real DCC++ layout with multiple command stations, and several of its behaviors exist specifically because live hardware doesn't always behave the way the JMRI API documentation implies:

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

JMRI MCP: common questions

Is JMRI MCP server safe?
Mostly: it is graded B (80/100). Read the JMRI MCP safety report
Does JMRI MCP need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is JMRI MCP maintained?
The last commit was 80 days ago (2026-08-16). The latest release is v1.0.0rc4.
What can I use instead of JMRI MCP?
Servers from other publishers that do the same job: DCC-MCP Core MCP server, agent-device MCP server and agent-device MCP server.
How does JMRI MCP compare with other AI and agents MCP servers?
safety score 80/100 (higher than 60% of 4,460 AI and agents servers); github stars 1 (more than 50% of 2,711 AI and agents servers). Full comparison.

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