Wincc Rest Api !!top!!

The WinCC REST API is not a tech demo; it powers serious industrial integration.

| WinCC Version | REST API Support | |----------------------------|--------------------------------| | WinCC Professional (TIA Portal) | ✅ Yes (via WebUX / WebAPI) | | WinCC Advanced (TIA Portal) | ❌ No (limited web services) | | WinCC Classic (V7.x) | ⚠️ Via add-on (Web Service / OData) | | WinCC Open Architecture (OA) | ✅ Built-in REST API | | WinCC Unified (TIA Portal) | ✅ Native REST API (modern) | wincc rest api

| Do ✅ | Don’t ❌ | |-------|----------| | Use HTTPS only (never HTTP) | Disable certificate validation | | Implement IP whitelisting | Use Basic Auth over unsecured networks | | Rotate API tokens regularly | Expose WinCC directly to the internet (use VPN/gateway) | | Create low-privilege API users (read-only if possible) | Give the same token write access to everything | | Log all API access attempts | Hardcode tokens in client code | The WinCC REST API is not a tech

: Supports HTTPS and secure authentication. You must configure certificates via the WinCC Certificate Manager and can assign specific read/write authorizations per tag. It relies on WinCC’s user groups or Windows authentication

It relies on WinCC’s user groups or Windows authentication. Stateless token-based auth (like JWT) is absent for older versions. In practice, you either use session cookies (stateful) or Basic auth over HTTPS — which feels out of place in a modern cloud-native world.

/WinCC/REST/Alarms/Current