Self-Hosting Nous Research Hermes Agent on Railway: Three Key Gotchas Explained
Nous Research's Hermes Agent is a self-improving AI agent that accumulates skills across sessions, but self-hosting it on Railway surfaces several non-obvious configuration challenges. Since a June 2026 security hardening update, the Hermes dashboard will not bind to a non-loopback address without a registered auth provider, meaning leaving the password field empty yields no dashboard at all rather than an open one. Railway also injects its own PORT variable at runtime set to 8080, while Hermes defaults to port 9119, causing silent 502 errors unless the entrypoint explicitly maps the two before startup. Additionally, persistent storage must be configured manually, as Railway tears down containers on redeploy, erasing any skills or session state the agent has accumulated. The author published an open-source MIT-licensed wrapper on GitHub that addresses all three issues and also offers a one-click Railway deployment template.
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