Hermes WebUI Review 2026: Features, Pricing & Setup Guide

I've been running Hermes Agent on a cheap VPS for about eight months now. The CLI is fine. It works. But after the fifth time I SSH'd in from my phone to check why a scheduled job hadn't fired, I started looking for something better.

Hermes WebUI showed up in a GitHub issue thread back in March. Someone had built a browser frontend for the agent. No build step. No bundler. Just Python and vanilla JavaScript. I was skeptical — most "community dashboards" die after three commits.

This one didn't.

As of mid-2026, Hermes WebUI sits at version 0.51.x, with over 7,000 automated tests and a release cadence that's frankly exhausting to track. I've been using it daily across four machines: my main dev box, a Hetzner VPS, a Raspberry Pi 4 at home, and my phone via SSH tunnel.

Here's the honest breakdown.

What Is Hermes WebUI?

Hermes WebUI is a lightweight, self-hosted web interface for the Hermes Agent. It is not an official Nous Research project. The README is explicit about this. It's maintained by a community contributor who apparently doesn't sleep.

What it does: it mounts the same ~/.hermes/ data directory your agent already uses, calls into Hermes's internal APIs, and renders everything — chat sessions, skills, memories, tool calls — in a browser interface.

Nope. It's not a replacement for the built-in dashboard that ships with Hermes on port 9119. That dashboard is for config inspection and log browsing. WebUI is for actually talking to your agent.

Run both. They don't conflict. Different ports, different volumes.

The Tech Stack

• Backend: Python (Flask-like internals, custom routing)
• Frontend: Vanilla JavaScript. Zero frameworks. Zero build tools.
• Streaming: Server-Sent Events (SSE) for real-time token output
• Syntax Highlighting: Prism.js
• Auth: Password protection or passkey-based
• Deployment: Docker, pip, or direct clone

The no-bundler choice is deliberate. You can clone the repo, install the Python dependencies, and be talking to your agent in under two minutes. I timed it.

Key Features (The Ones That Matter)

I'll skip the marketing fluff. Here's what actually works in production.

1:1 CLI Parity

This is the headline feature. Everything you can do from a terminal — start a session, call a tool, inspect memory, manage cron jobs — you can do from the web UI. No feature gaps. No "this feature is CLI-only."

Last Tuesday, on my staging cluster, I found myself migrating an entire session workflow from CLI to WebUI without touching the terminal once. That surprised me.

Three-Panel Layout

Left sidebar: session list and navigation. Center: the chat panel. Right: workspace file browser.

+-------------------+----------------------+------------------+
| Session List      | Chat Panel           | File Browser     |
|                   |                      |                  |
| - Today           | [User] Run the       | workspace/       |
|   - data-pipeline | deploy script        |   deploy.sh      |
|   - bug-hunt      |                      |   config.yaml    |
| - Yesterday       | [Agent] Running...   |   logs/          |
|   - code-review   |                      |                  |
+-------------------+----------------------+------------------+
| Composer Footer (input, context ring, token usage)            |
+----------------------------------------------------------------+

The file browser is not a gimmick. I use it constantly to inspect what files the agent has modified during a session. Inline preview for text files. No need to SSH in just to check a config.

Streaming Chat with SSE

Responses stream token by token. You can edit past messages, retry failed responses, queue messages while one is still generating, and cancel mid-stream.

The classic trap — I fell into it in production — is that SSE connections can drop on flaky networks. Hermes WebUI handles reconnection gracefully. The message queue prevents you from losing input during a reconnect.

Session Management

Create, rename, duplicate, delete, pin, archive. Sessions group into projects with tags and colors. The list sorts by Today, Yesterday, and Earlier.

I archive about 40 sessions a week. The pin feature saves the three I actually care about from drowning in noise.

Multi-Provider Model Support

Supports OpenAI, Anthropic, Google, DeepSeek, Nous Portal, OpenRouter, MiniMax, Xiaomi MiMo, Z.AI, and more. The model dropdown is dynamic — it pulls available models from your configured providers.

# Example config snippet for providers
providers:
  - name: openai
    api_key: ${OPENAI_API_KEY}
    models:
      - gpt-4o
      - gpt-4o-mini
  - name: anthropic
    api_key: ${ANTHROPIC_API_KEY}
    models:
      - claude-sonnet-4-20250514
      - claude-haiku-3-20250313
  - name: openrouter
    api_key: ${OPENROUTER_API_KEY}
    models:
      - meta-llama/llama-4-scout-17b-16e-instruct

Tool Call & Subagent Cards

When the agent calls a tool, the UI renders an inline card showing the tool name, arguments, and result snippets. Subagent delegations get distinct icons and indented borders.

This alone is worth the setup. In the CLI, tool calls are just text. In WebUI, they're structured cards you can expand, collapse, and inspect.

Security & Theming

Password protection is built in. SSH tunnel access is the recommended pattern for remote use. Dark and light themes are available.

Pricing

It's free. Open source under the MIT license. The code is on GitHub.

No tiers. No hidden enterprise edition. No "free up to 5 sessions." It costs nothing to download and run.

Actionable alternative: If you don't want to manage the infrastructure yourself, Try Hermes WebUI on a managed cloud instance. You get the same interface without the server babysitting.

Hermes WebUI Setup Guide

I've installed this on five different machines. Here's the path that works every time.

Prerequisites

• Python 3.10+
• Git
• A working Hermes Agent installation (the bootstrap script can install it if missing)
• Port 7777 (default) available

Option 1: Docker (Recommended)

docker run -d \
  --name hermes-webui \
  -p 7777:7777 \
  -v ~/.hermes:/home/user/.hermes \
  -e HERMES_WEBUI_PASSWORD=your_password \
  ghcr.io/nesquena/hermes-webui:latest

That's it. Open http://localhost:7777 and log in.

Option 2: Direct Install

git clone https://github.com/nesquena/hermes-webui.git
cd hermes-webui
pip install -r requirements.txt
python app.py

The bootstrap script will detect if Hermes Agent is installed. If not, it installs it.

Remote Access via SSH Tunnel

# On your local machine
ssh -L 7777:localhost:7777 user@your-vps-ip

Then open http://localhost:7777 in your browser. Works on phones, tablets, whatever.

After two hours of debugging my YAML configs, I finally found the culprit: a missing proxy_set_header directive in my nginx config for WebSocket support. If you're reverse-proxying, add this:

location / {
    proxy_pass http://localhost:7777;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
}

Hermes WebUI vs Built-in Dashboard

Run both. The built-in dashboard is good for "what is the agent doing right now and where do I tweak it." WebUI is good for "I want to chat with the agent without opening a terminal."

Hermes WebUI vs Open WebUI

We covered this in detail in our comparison article, but the short version:

• Open WebUI is a general-purpose interface for various LLM backends. It's heavier, requires Ollama or an OpenAI-compatible backend, and has a different feature set.
• Hermes WebUI is purpose-built for Hermes Agent. It's lighter (no build step, no framework, no bundler) and offers 1:1 CLI parity with persistent memory and scheduling.

If you're using Hermes Agent, Hermes WebUI is the obvious choice. If you're running multiple different backends, Open WebUI might serve you better.

Architecture Overview

The WebUI doesn't replace the agent. It sits on top, calling the same APIs the CLI uses. All data stays in your ~/.hermes/ directory. Nothing leaves your infrastructure unless you explicitly configure a cloud provider.

The Good, The Bad, The Janky

What Works Great

• Speed: Pages load in under 200ms. No React hydration delays.
• Reliability: I've had it running for 47 days straight on a $5 VPS without a restart.
• Feature completeness: I haven't found a CLI feature missing from the UI.
• Mobile responsiveness: The layout collapses cleanly on small screens.

What's Finicky

• Password setup: If you forget to set HERMES_WEBUI_PASSWORD in Docker, it falls back to a default. Change it immediately.
• File browser refresh: The file list doesn't auto-refresh. You have to click the refresh button. Minor annoyance.
• Session archive limit: Archived sessions older than 30 days get auto-deleted. There's a config flag to change this, but it's not documented well.

The Footgun

Don't expose port 7777 directly to the internet. Use an SSH tunnel or a Tailscale network. The password protection helps, but the auth implementation is basic. SSH tunnel is the recommended pattern for a reason.

FAQ

How does Hermes WebUI compare to Open WebUI?

Hermes WebUI is designed specifically for Hermes Agent, offering 1:1 CLI parity and persistent memory, while Open WebUI is a general-purpose interface for various LLM backends. Hermes WebUI is lighter (no build step, no framework, no bundler) and focuses on the Hermes ecosystem.

What is the best webUI for Hermes?

Hermes WebUI is the official web interface for Hermes Agent, providing full CLI parity, persistent memory, and multi-provider support. It integrates seamlessly with the Hermes Agent setup.

Can I use Hermes WebUI on my phone?

Yes, Hermes WebUI is accessible from any browser, including mobile browsers, via an SSH tunnel. It is designed to be responsive and work on phones.

Is Hermes WebUI open source?

Yes, Hermes WebUI is open source under the MIT license, and the code is available on GitHub.

Do I need to install Hermes Agent separately?

Yes, Hermes WebUI is a frontend for Hermes Agent. The bootstrap script can detect and install Hermes Agent if missing.

Final Verdict

Hermes WebUI is the interface Hermes Agent deserved from day one. It's lightweight, it's fast, and it gives you everything the CLI offers without forcing you to live in a terminal.

Is it perfect? No. The file browser needs auto-refresh. The documentation could be better. But for a community-maintained project with no funding and no corporate backing, it's remarkably solid.

If you're running Hermes Agent and you haven't tried WebUI yet, you're making your life harder than it needs to be.

Actionable alternative: Skip the server setup entirely and Try Hermes WebUI as a managed service. Same interface, zero infrastructure headaches.