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Attach a custom domain to an environment and start verifying it. The domain remains pending until its DNS records are verified.

Usage

Flags

string
required
Project ID or slug.
string
required
App ID or slug.
string
required
Environment ID or slug.
string
required
Fully qualified domain name without a scheme, port, or path.

Global Flags

Examples

See Custom domains for DNS and verification details.
Last modified on August 25, 2026