> ## Documentation Index
> Fetch the complete documentation index at: https://docs.bult.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Networking

#### Public Networking

Expose services via auto-generated URLs (e.g., [https://project1.fin1.bult.app](https://project1.fin1.bult.app)). Add custom domains (e.g., blog.com) with CNAME to fin1.bult.app. Verify in [app.bult.ai/domains](https://app.bult.ai/domains).

#### Private Networking

Enable private communication between services (e.g., Express to MongoDB) without explicit links (August 2025 update). Ports auto-detected; edit in “General” tab.