Click to Call uses real-time voice over the web. Most home and mobile networks work without any configuration. Corporate networks with strict outbound policies may need a short allowlist.Documentation Index
Fetch the complete documentation index at: https://docs.apifycloud.io/llms.txt
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From the visitor’s side
Visitors on public networks (home Wi-Fi, mobile data, café, hotel) can usually place calls without any setup. If quality is poor, it is almost always a local-network issue — Wi-Fi signal strength, background traffic, or a congested ISP — rather than a Click to Call–specific requirement. The Audio quality guide covers what visitors can do when a call sounds bad.NAT and ICE
Most networks use NAT (home routers, office gateways, carrier-grade NAT on mobile). Click to Call uses the standard ICE negotiation to find the best media path automatically, and falls back to a media relay when a direct path isn’t possible. No configuration is required for any of this.HTTPS is mandatory
Browsers only allow microphone access on pages served over HTTPS. If you embed the widget on your own site, your page must be HTTPS. The hosted widget URL we provide is always HTTPS.What’s next
Audio quality
Understanding the Network indicator and how to act on it.
Troubleshooting
Specific fixes when calls fail despite meeting the requirements.