google_email_verification_required
Google does not host this email address: its verified-email claim alone cannot prove current mailbox ownership. Use email/password sign-in, email signup, or password reset. No account is read, created, linked or verified, and no session is issued.
Problem shape
Every non-2xx response is an RFC 9457 application/problem+json body. The type URI below is stable and machine-matchable, so branch on the final path segment (the code) and treat the status as redundant confirmation. See the error-handling guide.
{
"type": "https://docs.vocapable.com/errors/google_email_verification_required",
"title": "…",
"status": 403,
"detail": "…",
"instance": "/v1/…"
}