Three steps to verifying customers.
Create an account, send a verification code to a real phone number, then configure the sender channels your users will see.
From sign-up to first verified user in an afternoon.
Follow these three steps and you'll have OTP verification running across SMS, voice, and email.
- 01
Sign up for Bird.
Create your account and get an API key. The free tier includes enough volume to build and test your integration before you commit.
- 02
Verify your first customer.
Send a one-time passcode and check the result with two API calls. Works over SMS, voice, WhatsApp, or email with no code change. Read the quickstart →
- 03
Configure your senders.
Choose which channels to use, set fallback order, and customize your sender ID or email address. Most configurations take effect immediately. Senders guide →
Fraud-resistant verification, any channel.
One API for OTP, 2FA, and passwordless login across SMS, voice, WhatsApp, and email. Sign up and verify your first user in under five minutes.