Send one-time passcodes to email addresses for account signups, passwordless sign-ins, and step-up verification, or use email as an automatic fallback when SMS or WhatsApp cannot reach a user. Launch immediately from a shared Bird sender or your own verified domain while Bird handles 40 localized templates, code hashing, expiration windows, and attempt limits.
Check the code
Harbor hello@harbor.example
To maya@example.com
Verification
Your verification code
123456
It expires in 10 minutes. Don’t share it with anyone.
POST/v1/verify/verifications/check
200{ "success": true, "reason": null, "attempts_remaining": null }
Check the code
Harbor hello@harbor.example
To maya@example.com
Verification
Your verification code
123456
It expires in 10 minutes. Don’t share it with anyone.
POST/v1/verify/verifications/check
200{ "success": true, "reason": null, "attempts_remaining": null }
Check the code
Harbor hello@harbor.example
To maya@example.com
Verification
Your verification code
123456
It expires in 10 minutes. Don’t share it with anyone.
POST/v1/verify/verifications/check
200{ "success": true, "reason": null, "attempts_remaining": null }
Bring the verification into your sign-in flow. Collect the code, check the answer, and help the customer continue.
Send a code and check the user’s input in two API calls, whether email is your primary verification channel or a backup when mobile messages cannot get through.
Pass an email address for dedicated email flows like account registration, or include both a phone number and an email address so a delayed SMS or WhatsApp attempt can fall back to the inbox within the same session.
Start sending immediately with Bird Verify or Authifly, or connect a verified domain so passcodes arrive from your own address. Built-in templates render the code and expiration window across 40 languages without tracking pixels that can hurt inbox placement.
Submit the code against the recipient address you started with instead of tracking verification IDs in your database. Bird enforces expiration windows and attempt budgets automatically, returning the remaining tries on a typo and locking the session once resolved.
Configure custom sender domains, adjust expiration and retry rules, and subscribe to real-time delivery and verification events.
Send passcodes from Bird Verify, Authifly, or an authenticated domain your workspace owns.
→Set code length, expiration windows, attempt limits, and resend cooldowns for your sign-in flow.
→Receive signed webhooks when passcodes are sent, delivered, verified, or undeliverable.
→Organize teams in workspaces, control API access, and trace changes through audit logs.
Organization
Harbor
Access stays in its workspace.
Production/API keys
Signup service
ActiveAlex Lee
Admin
Today · UTC
Audit log
Organization
Harbor
Access stays in its workspace.
Production/API keys
Signup service
ActiveAlex Lee
Admin
Today · UTC
Audit log
Organization
Harbor
Access stays in its workspace.
Production/API keys
Signup service
ActiveAlex Lee
Admin
Today · UTC
Audit log