Implementing a 2FA Login SMS OTP API in Postgres — Cancel Semantics

Implementing a 2FA login SMS OTP API requires a clear division of labor. Postgres should manage token validity, resend ordering, and cancellation, while the API handles message delivery. Startups are advised to use hosted SMS OTP APIs from providers like Twilio Verify or Vonage Verify to eliminate the need for custom code generation and replay defense. Crucially, authorization-capable verification flows must remain separate from general compliance or subscription notices to maintain distinct security policies and state models.