Does .api exist?
No. No — .api is not a TLD, though half the developer world assumes it is.
The full story
Given how many products live at api.something.com, the assumption is natural — but no .api TLD has been delegated. Subdomain convention (api.yourdomain) remains the pattern.
What to use instead
.dev — Best value in domains for anything developer-facing.io — The default startup TLD of the 2010s.sh — The shell-script TLD
Wondering about another extension? Every real TLD is in the directory.
This answer is generated from the live IANA root zone list, not from vibes. If the DNS changes, this page changes.