SpoolBeacon

Self-hosted filament inventory for 3D printing. Track spools, purchases and shop prices — get notified when a filament hits your target price.

Quick Start · Features · Configuration · Price Monitoring · Troubleshooting

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Screenshots

Dashboard	Inventory

Filament Detail	Spools

Print Log	Log Print Form

Shop Rules	Manufacturers

API Keys

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📦 Features

Inventory	Filaments by manufacturer, material, color and diameter — including dual-color/co-extruded filaments. Spools track remaining weight, fill %, storage location and status.
Print Log	Log every print job with name, notes and one or more filament lines. Each line deducts used grams from the spool and auto-updates its status (opened → almost empty → empty).
Manufacturers	Dedicated manufacturer pages listing every product from that brand.
Purchase history	Price per spool, lot number, currency — spools are auto-created on purchase.
Price monitoring	Shop links with manual prices and automated scraping via ShopRules or built-in adapters.
Price alerts	Alert when price ≤ target (absolute or per kg) — Discord and SMTP notifications.
Spool labels	Printable QR-code labels per spool for physical tagging.
Backup & restore	Full JSON export/import — additive, safe to re-run.
Dashboard	Overview, low-stock list, material/color breakdown, active alerts, scheduler status.
User management	Admin / Member / Viewer roles — Viewer is fully read-only.
REST API	Full JSON API with bearer-token auth — read/write inventory, spools and print jobs. Interactive docs at /api/docs (Swagger UI).

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🔧 Requirements

• Docker + Docker Compose

For local development: Python 3.12+

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🚀 Quick Start

Option A — Docker Hub (recommended, no clone needed)

Create a compose.yaml:

services:
  web:
    image: sytxlabs/spoolbeacon:latest
    ports:
      - "${APP_PORT:-8080}:${APP_PORT:-8080}"
    env_file: .env
    restart: unless-stopped
    depends_on:
      db:
        condition: service_healthy

  db:
    image: mariadb:11
    restart: unless-stopped
    environment:
      MARIADB_ROOT_PASSWORD: ${DB_PASSWORD}
      MARIADB_DATABASE: ${DB_NAME}
      MARIADB_USER: ${DB_USER}
      MARIADB_PASSWORD: ${DB_PASSWORD}
    volumes:
      - db_data:/var/lib/mysql
    healthcheck:
      test: ["CMD", "healthcheck.sh", "--connect", "--innodb_initialized"]
      interval: 10s
      timeout: 5s
      retries: 5

volumes:
  db_data:

Create a .env next to it:

SECRET_KEY=       # generate: python -c "import secrets; print(secrets.token_hex(32))"
APP_PORT=8080
DB_HOST=db
DB_PORT=3306
DB_USER=spoolbeacon
DB_PASSWORD=changeme
DB_NAME=spoolbeacon
QUART_AUTH_COOKIE_SECURE=true

Pull and start:

docker compose up -d

Option B — From source (GitHub)

git clone https://github.com/Sytxlabs/SpoolBeacon.git
cd SpoolBeacon
cp .env.example .env   # edit SECRET_KEY and DB_PASSWORD
docker compose up --build -d

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MariaDB starts automatically, migrations run on container start. The app is exposed on APP_PORT (default 8080) — only that port is mapped to the host, MariaDB stays internal to the compose network.

First admin account

Open http://your-host:8080/setup — only available when no users exist yet.

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⬆️ Updating

Docker Hub install:

docker compose pull
docker compose up -d

From source:

git pull
docker compose up --build -d

Migrations run automatically on restart.

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🛠️ Local Development

python -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt
playwright install --with-deps chromium
cp .env.example .env   # fill in DB credentials
python migration.py upgrade head
python main.py         # runs on http://localhost:8080

Seed sample data:

python seed.py           # manufacturers, products, purchases, links, rules (idempotent)
python seed.py --reset   # wipe all tables (except users/settings) and re-seed
python seed_shops.py     # ShopRules only, no inventory data

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⚙️ Configuration

All runtime settings are managed on the Settings page (/settings, admin only) — not via .env.

Section	What you can configure
Scheduler	Enable automatic price checks, set interval in minutes
Fetch engine	playwright (default, JS-capable) or httpx (faster, no JS)
Discord	Webhook URL, enable/disable, test message
Email (SMTP)	Host, port, credentials, TLS, from/to address, test email
Spool code template	Pattern for auto-generated spool codes
Backup & Restore	Export full inventory as JSON, import additively (admin only)

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📈 Price Monitoring

Built-in Adapters

These shops work out of the box without any manual configuration:

Shop	Method
3djake.de	CSS selector
prusa3d.com	JSON-LD
anycubic.com	Shopify JSON-LD
eu.store.bambulab.com	JSON-LD (cloudscraper)
esun3dstore.com	Shopify JSON-LD (cloudscraper)
esun3dstoreeu.com	Shopify JSON-LD (cloudscraper)
elegoo.com	Shopify og:price:amount

To add a new adapter: subclass BaseAdapter in app/shop_adapters/, implement extract(html, url) -> AdapterResult, register in registry.py via _reg(YourAdapter()).

ShopRules (generic)

For any other shop: create a rule at /shop-rules with domain, CSS price selector, and optional regex — or use the visual point-and-click picker to build one without touching CSS. German (1.299,00 €) and English (1,299.00) price formats are detected automatically.

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🖨️ Print Log

Navigate to Prints in the nav bar (or /prints/) to see all logged print jobs.

Hit + Log Print to record a new job:

1. Enter an optional print name and notes.
2. Add one or more filament lines — select a spool from the grouped dropdown, enter grams used. The live preview shows how much is left on that spool.
3. Hit Save Print Log — remaining weight is deducted from each spool immediately and spool status updates automatically (new → opened → almost empty → empty).

Supports multi-filament prints (e.g. dual-extrusion or colour changes mid-print) by adding multiple lines.

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🔌 REST API

SpoolBeacon exposes a versioned JSON API at /api/v1/. Interactive documentation (Swagger UI) is available at /api/docs — no login required, just a bearer token.

Authentication

API keys are managed at /api-keys (admin only). Each key is shown once at creation time and stored as a SHA-256 hash.

Authorization: Bearer <your-token>

Endpoints

Method	Path	Description
GET	/api/v1/health	Health check (no auth required)
GET	/api/v1/manufacturers	List all manufacturers
GET	/api/v1/products	List all filament products
GET	/api/v1/products/{id}	Product detail including all spools
GET	/api/v1/spools	List spools — filter with ?status=new|opened|almost_empty|empty|archived
GET	/api/v1/spools/{id}	Single spool
PATCH	/api/v1/spools/{id}	Update remaining weight {"remaining_g": 450} — status auto-updates
GET	/api/v1/prints	Paginated print jobs (?page=, ?per_page= max 100)
POST	/api/v1/prints	Log a print job (deducts weight from spools)

POST /api/v1/prints body

{
  "print_name": "Benchy",
  "notes": "Optional",
  "lines": [
    {
      "spool_id": 3,
      "used_g": 12.5
    },
    {
      "spool_id": 7,
      "used_g": 4.0
    }
  ]
}

Spool weight is deducted immediately and spool status auto-updates (new → opened → almost empty → empty).

Quick example

TOKEN=your-token-here

# List active spools
curl -H "Authorization: Bearer $TOKEN" http://your-host:8080/api/v1/spools?status=opened

# Log a print job
curl -X POST \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"print_name":"Benchy","lines":[{"spool_id":1,"used_g":6.2}]}' \
  http://your-host:8080/api/v1/prints

Full schema and "Try it out" in Swagger UI: http://your-host:8080/api/docs

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⚠️ Known Limitations

• Amazon / eBay not supported — Amazon requires an authenticated session or the Product Advertising API; eBay blocks scraping via Cloudflare
• Heavy WAFs (Cloudflare Enterprise) block even cloudscraper — a proxy or official API is needed
• No printer / slicer integration — no Klipper, OrcaSlicer or automatic print job import; print jobs can be submitted via the REST API
• No mobile app — web only, mobile-optimised responsive layout

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🩺 Troubleshooting

App won't start — Database not initialized

Check DB credentials in .env. MariaDB must be reachable and the database must exist.

Migrations fail — Table already exists

Run python migration.py stamp head to mark the current state, then migrate.

Playwright checks time out

Increase playwright.timeout_ms in Settings (default: 30 000 ms).

Price not found

The shop's HTML structure changed. Use the Test button on /shop-rules and update the selector/regex.

Setup page unavailable

/setup is locked once a user exists. Add users via /users (admin only).

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🐳 Docker Image

Pre-built images are published to Docker Hub on every push to master and on version tags:

Tag	Description
sytxlabs/spoolbeacon:latest	Latest stable build from master
sytxlabs/spoolbeacon:<version>	Pinned release (e.g. 1.0.0)

docker pull sytxlabs/spoolbeacon:latest

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📄 License

MIT — see the LICENSE file for details.