Protected destinations
Nova Shield checks destination changes, explains risk signals, and warns or blocks when necessary.
Developer API
Build protected links into your product
Create and manage links with scoped tokens, idempotent requests, analytics, conversions, and signed webhooks.
Protected by Nova ShieldMobile friendlyFree to start
Product demonstration
01 · Create a scoped token✓
02 · Send an idempotent request✓
03 · React to signed events✓
Secure by defaultWorkspace controlledReady to measure
✓Protected destinations
∞Reliable redirects
◌Privacy-conscious measurement
↗Export and portability
How it works
From destination to measurable result
A clear workflow with security and control built into every step.
- 01
Create a scoped token
Grant only the permissions the integration needs.
- 02
Send an idempotent request
Use HTTPS and an Idempotency-Key for safe retries.
- 03
React to signed events
Verify HMAC signatures and stable delivery IDs.
Built for real use
Control, measurement, and continuity
Measurable outcomes
Connect clicks to campaigns, verified conversions, and revenue—not just vanity charts.
Reliable redirects
Your links keep redirecting when detailed analytics limits are reached or a paid plan is downgraded.
Brand and control
Use branded domains, custom QR codes, access rules, campaigns, and workspaces without losing ownership.
Frequently asked questions
Useful answers before you start
Can I use 4ul.ink for free?
Yes. You can create guest links without an account or create a free workspace with dashboard access and core link-management features. Paid plans add higher limits and advanced tools.
Do I need an account?
No. You can create a guest link without registering. Create a free account to save your links, access analytics, and manage link settings from your dashboard.
Can I track guest links?
Guest links are designed for quick, temporary sharing. Create a free workspace to save links and access their analytics.
Start now
Create your first protected link
Start free, keep control, and add advanced capabilities when you need them.