Create a permanent, unauthenticated public URL for an existing file. The underlying file is unaffected and can still be fetched through the authenticated content endpoint. Use this when you want to share a stored asset (image, video, PDF) outside your API-keyed environment. Public URLs can be revoked at any time via `POST /v1/files/{file_id}/public-url/revoke`.

Seconds from now until the public URL expires. Must be between 3600 (1 hour) and 2592000 (30 days). Omit to inherit the file's expiry (if it has one) or to make the URL valid indefinitely.

Unix timestamp (seconds) when the public URL expires. Present when the public URL has an expiry, either from an explicit expires_after in the request or inherited from the file's TTL. Absent when the public URL is valid indefinitely.

The full public URL.