domain-limit
Check Email Canonical
Check whether a Gmail address is a dot-trick duplicate of an existing account.
Only meaningful for @gmail.com / @googlemail.com addresses. Always returns duplicate: false for all other domains. This intentionally trades limited account-enumeration exposure for a clear signup error; the unauthenticated route is IP-rate-limited.
post/auth/check-email-canonical
Request body
Response
Successful Response
Changes
No recorded changes to this endpoint across all 3 revisions of this API.