SiteWatch — Uptime Monitor in Your Browser

Know when your sites go down — instantly, from your toolbar.

SiteWatch is a Chrome extension that watches your websites 24/7. Your uptime status lives right in your browser toolbar as a green/red badge you glance at 50 times a day.

Use SiteWatch Cloud for zero-setup monitoring, or self-host the server for unlimited everything.

Website | Chrome Web Store (coming soon) | Pricing

Three Ways to Use It

	Self-Hosted	Cloud Free	Cloud Pro
Sites	Unlimited	3	50
Check interval	You decide	5 min	1 min
History	Unlimited	24 hours	30 days
Setup	Your server	Install & go	Install & go
Cost	$0	$0	$5/mo

Why SiteWatch?

Feature	SiteWatch	UptimeRobot Free	Pingdom
Browser badge	Real-time	No	No
Self-hosted option	Yes	No	No
Cloud option	Yes	Yes	Yes
Desktop alerts	Native Chrome	Email only	Email/SMS
Open source	MIT	No	No
Starting price	$0	$0	$15/mo

Architecture

┌──────────────────┐     HTTPS/REST     ┌──────────────────────┐
│  Chrome Extension │ <───────────────> │  Monitor Server       │
│                  │                    │                      │
│  - Popup UI      │                    │  - Pings sites       │
│  - Badge status  │                    │  - Stores history    │
│  - Notifications │                    │  - REST API          │
│  - Mode selector │                    │  - Multi-tenant      │
└──────────────────┘                    │  - Zero dependencies │
                                        └──────────────────────┘
                                        (your VPS or our cloud)

Quick Start

Option A: SiteWatch Cloud (easiest)

1. Install the Chrome extension
2. Click "Use SiteWatch Cloud"
3. Get a free license key from LemonSqueezy
4. Paste the key, click Activate — done!

Option B: Self-Hosted (unlimited)

One-command install:

git clone https://github.com/zerodeps-dev/sitewatch.git
cd sitewatch
bash scripts/setup.sh

Or run manually:

cd server
SITEWATCH_TOKEN=your-secret-token node server.js

Or with Docker:

SITEWATCH_TOKEN=your-secret-token docker compose up -d

Then install the extension, click "Connect to my server", enter your URL and token.

Server Configuration

Variable	Default	Description
SITEWATCH_PORT	3200	HTTP port
SITEWATCH_HOST	0.0.0.0	Bind address
SITEWATCH_TOKEN	change-me-in-production	Bearer auth token (self-hosted)
SITEWATCH_DATA	./data	Data storage directory
SITEWATCH_MODE	selfhosted	selfhosted or cloud
SITEWATCH_CORS_ORIGIN	*	CORS allowed origin
LEMONSQUEEZY_API_KEY	(none)	LemonSqueezy API key (cloud only)
LEMONSQUEEZY_FREE_PRODUCT_ID	(none)	Free product ID (cloud only)
LEMONSQUEEZY_PRO_PRODUCT_ID	(none)	Pro product ID (cloud only)

API Reference

All endpoints except /api/health and /api/auth/activate require Authorization: Bearer <token> header.

Method	Endpoint	Description
GET	/api/health	Public health check
POST	/api/auth/activate	Activate license key (cloud only)
POST	/api/auth/upgrade	Upgrade to Pro license (cloud only)
GET	/api/status	Quick badge data (all sites)
GET	/api/account	Plan info and limits
GET	/api/sites	List all monitored sites
POST	/api/sites	Add site {"url": "...", "name": "..."}
GET	/api/sites/:id	Site details + recent history
DELETE	/api/sites/:id	Remove a site
GET	/api/sites/:id/history	Full check history (?limit=100)

Deploy with Caddy (HTTPS)

monitor.yourdomain.com {
    reverse_proxy localhost:3200
}

Tech Stack

• Server: Node.js 18+, zero npm dependencies, ES modules
• Storage: JSON files (per-tenant in cloud mode)
• Extension: Chrome Manifest V3, vanilla JS, no framework
• Payments: LemonSqueezy (Merchant of Record)
• Deployment: systemd, Caddy, Docker (optional)
• License: MIT

Contributing

Contributions are welcome! Please open an issue first to discuss what you'd like to change.

License

MIT — Use it, modify it, ship it.

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Built by ZeroDeps — Zero npm dependencies, zero hosting costs.