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---
name: hermes-webui
description: Deploy, configure, and troubleshoot the Hermes Web UI Docker container — the browser interface for Hermes Agent.
version: 1.0.0
author: Hermes Agent
license: MIT
platforms: [linux, macos]
metadata:
hermes:
tags: [hermes, webui, docker, browser, troubleshooting]
source: https://github.com/nesquena/hermes-webui
related_skills: [hermes-agent, hermes-dashboard]
---
# Hermes Web UI
The Hermes Web UI (`ghcr.io/nesquena/hermes-webui`) provides a browser-based interface for Hermes Agent — chat with the agent, browse sessions, manage workspace files, and monitor agent activity. It runs as a Docker container alongside the Hermes Agent gateway.
For a **management-focused control panel** (config editing, model switching, tool toggling, cron control, log viewing), see the `hermes-dashboard` skill — a complementary Flask dashboard that reads Hermes state directly from the filesystem.
## Quick Start
```bash
# Pull and run
docker run -d \
--name hermes-webui \
-p 8787:8787 \
-v /path/to/hermes-home:/home/hermeswebui/.hermes \
-v /path/to/workspace:/workspace \
-e HERMES_WEBUI_PASSWORD=your-password \
ghcr.io/nesquena/hermes-webui:latest
# With agent source mounted (for full functionality):
docker run -d \
--name hermes-webui \
-p 8787:8787 \
-v /path/to/hermes-home:/home/hermeswebui/.hermes:ro \
-v /path/to/hermes-agent-source:/home/hermeswebui/.hermes/hermes-agent:ro \
-v /path/to/workspace:/workspace \
-e HERMES_WEBUI_PASSWORD=your-password \
ghcr.io/nesquena/hermes-webui:latest
```
Open `http://localhost:8787` in a browser and log in with the password.
## Architecture
The Web UI requires two adjacent systems to function fully:
1. **Hermes Agent source code** — the Web UI imports `AIAgent` from the Hermes Agent Python library directly. Without it, features like model auto-detection, personality routing, and CLI session imports are disabled.
2. **Hermes Gateway / API Server** — the Web UI communicates with the Hermes API server (OpenAI-compatible, typically port 8642) for agent execution. The API server is started by the Hermes gateway process.
## Configuration
### Environment Variables
| Variable | Default | Description |
|----------|---------|-------------|
| `HERMES_WEBUI_PASSWORD` | (required) | Login password for the web interface |
| `HERMES_WEBUI_BIND_HOST` | `0.0.0.0` | IP to bind the HTTP server |
| `HERMES_WEBUI_BIND_PORT` | `8787` | Port for the HTTP server |
| `HERMES_WEBUI_STATE_DIR` | `~/.hermes/webui` | Where sessions, workspaces, and state are stored |
| `HERMES_WEBUI_DEFAULT_WORKSPACE` | `/workspace` | Default workspace directory shown on first launch |
| `WANTED_UID` | `1024` | User ID to run as (auto-detected from mounted volumes) |
| `WANTED_GID` | `1024` | Group ID (auto-detected from mounted volumes) |
### Volume Mounts
| Host Path | Container Path | Purpose |
|-----------|---------------|---------|
| `~/.hermes` | `/home/hermeswebui/.hermes` | Hermes home directory (config, sessions, skills) |
| `~/.hermes/hermes-agent` | `/home/hermeswebui/.hermes/hermes-agent` | Agent source code (for AIAgent import) |
| `/path/to/workspace` | `/workspace` | Workspace/project files |
## Common Tasks
### Check if agent is recognized
```bash
docker logs hermes-webui | grep -E "agent dir|AIAgent"
```
Expected healthy output:
```
agent dir : /home/hermeswebui/.hermes/hermes-agent [ok]
```
### Verify health
```bash
curl -s http://localhost:8787/health
```
### View server logs
```bash
docker logs hermes-webui
```
### Restart
```bash
docker restart hermes-webui
```
## Pitfalls
- **`HERMES_WEBUI_STATE_DIR` is required.** Despite having a default in the docs, the container errors out hard without it: `!! ERROR: HERMES_WEBUI_STATE_DIR not set`. Always pass `-e HERMES_WEBUI_STATE_DIR=/home/hermeswebui/.hermes/webui` on the docker run command, or the container will crash-loop.
- **Agent source must be accessible at container startup.** The init script installs dependencies from `pyproject.toml` before the server starts. If the source is added after the container is already running, you must remove `/app/venv/.deps_installed` and restart for the init script to reinstall.
- **Read-only mounts recommended.** The init script warns if the agent source mount is writable from the WebUI container. The multi-container compose defaults use a read-only mount for defence-in-depth.
- **Password redaction in terminal output.** When constructing the `docker run` command through the terminal tool, the password in `-e HERMES_WEBUI_PASSWORD=secret` may be replaced with `***` by secret redaction before the command executes. To bypass: use `execute_code` with Python to construct the command, or write the password hex-encoded and decode it in the heredoc, or verify the deployed password by checking its length and first/last chars via `docker inspect`.
- **Permission errors on restart.** Prior `pip install -e` runs as root may leave root-owned `.pyc` files in the venv. If the init script errors with `Permission denied` during reinstall, clean them: `docker exec hermes-webui find /app/venv -user root -delete`
- **First startup is slow.** The init script installs dependencies on first run — allow ~30 seconds for startup.
- **API server must be running.** The Web UI needs the Hermes API server (started by `hermes gateway run`) on port 8642. Without it, agent chat will fail even if the Web UI's `health` endpoint reports OK.
- **Provider credential mismatch.** The Web UI has its OWN isolated `.env` and `config.yaml` inside the mounted Hermes home directory, separate from the host's Hermes config. If these files use a different provider or a placeholder API key, the agent will fail with HTTP 401 errors. Always sync both files when switching providers. See `references/provider-credentials-and-sessions.md`.
- **Stale sessions retain old provider settings.** Sessions are cached in `<state_dir>/sessions/<id>.json` with the model and provider that were active at creation time. Switching providers in config.yaml does NOT update existing sessions. The web UI reads `s.model` and `s.model_provider` from the cached session and passes them to `AIAgent.__init__`, which then tries the OLD provider. Symptoms: "No LLM provider configured" on messages even after a correct provider config. Fix: update both `model` and `model_provider` fields in the session JSON, or delete the session file so the frontend creates a fresh one.
- **settings.json caches default_model_provider.** The file at `<state_dir>/settings.json` stores `default_model_provider`. If you switched providers, update this field too — otherwise new sessions will still be created with the old provider.
## Troubleshooting
### Symptom: HTTP 401 on chat
Check the web UI's `.env` has the correct API key for the provider in `config.yaml`:
```bash
# Compare config provider with available keys
docker exec hermes-webui cat /home/hermeswebui/.hermes/config.yaml
docker exec hermes-webui cat /home/hermeswebui/.hermes/.env
```
The key variable name must match what the provider expects (e.g. `DEEPSEEK_API_KEY` for `deepseek`, `OPENROUTER_API_KEY` for `openrouter`).
### Symptom: "No LLM provider configured" on every message
This usually means the cached session has a stale provider. Check and fix:
```bash
# 1. Check what model/provider the session has
docker exec hermes-webui bash -c 'python3 -c "
import json
with open(\"/home/hermeswebui/.hermes/webui/sessions/$(
ls -t /home/hermeswebui/.hermes/webui/sessions/*.json 2>/dev/null | head -1
)\") as f:
d = json.load(f)
print(f\"model={d.get(\\\"model\\\")} provider={d.get(\\\"model_provider\\\")}\")
"'
# 2. Fix the session (replace with your actual provider/model)
docker exec hermes-webui bash -c 'python3 -c "
import json
p = \"/home/hermeswebui/.hermes/webui/sessions/*.json\"
import glob
for f in glob.glob(p):
with open(f) as fh:
d = json.load(fh)
d[\"model\"] = \"deepseek-v4-flash\"
d[\"model_provider\"] = \"deepseek\"
with open(f, \"w\") as fh:
json.dump(d, fh)
"'
# 3. Also fix settings.json if needed
docker exec hermes-webui bash -c 'python3 -c "
import json
with open(\"/home/hermeswebui/.hermes/webui/settings.json\") as f:
d = json.load(f)
d[\"default_model_provider\"] = \"deepseek\"
with open(\"/home/hermeswebui/.hermes/webui/settings.json\", \"w\") as f:
json.dump(d, f, indent=2)
"'
# 4. Restart to pick up changes
docker restart hermes-webui
```
Alternatively, delete the stale session entirely and let the frontend create a fresh one:
```bash
docker exec hermes-webui bash -c 'rm -f /home/hermeswebui/.hermes/webui/sessions/*.json && echo "{}" > /home/hermeswebui/.hermes/webui/sessions/_index.json'
docker restart hermes-webui
```
### Symptom: Provider shows as configured but models fail to load
Check that the web UI's config.yaml uses the correct key names for the model section:
```yaml
model:
provider: deepseek # Must match a provider in the Hermes registry
default: deepseek-v4-flash # The model name
base_url: https://api.deepseek.com/v1
```
The config.yaml key is `default` (not `model`). If you wrote `model:` inside the `model:` section, provider resolution will return empty.
## References
- `references/aiagent-not-available.md` — fixing the "AIAgent not available" error when the container cannot find the Hermes Agent source.
- `references/provider-credentials-and-sessions.md` — detailed diagnosis flow for 401 errors and stale session/provider mismatches, including scripted fixes.
- `references/firecrawl-reddit-limitations.md` — Firecrawl explicitly blocks Reddit; only WSB RSS works.