| Domain | Description | Required |
| *.apprentx.rocks | B12 application (backend, frontend) | X |
| *.b12-apprentx.com | Email notifications are sent from this domain: notification@b12-apprentx.com | X |
| *.canva.com | Custom image processing | |
| *.cloudflare.com | CDN | X |
| *.cloudflareinsights.com | Behavioral analysis | |
| *.googleapis.com | Fonts | X |
| *.google-analytics.com | Behavioral analysis | |
| *.google.com | reCaptcha | X |
| *.googletagmanager.com | Behavioral analysis | |
| *.gravatar.com | Profile pictures | |
| *.gstatic.com | Fonts | X |
| *.hotjar.com | Behavioral analysis | |
| *.hotjar.io | Behavioral analysis | |
| *.launchdarkly.com | Feature flags for enabling/disabling features without re-deploying | X |
| *.mixpanel.com | Behavioral analysis | |
| *.sentry.io | Error logging | |
| *.soundcloud.com | Embed audio player | |
| *.vimeo.com | Embed video player | |
| *.vimeocdn.com | Embed video player | |
| *.youtube.com | Embed video player | |
| *.ytimg.com | Embed video player |