One of the best free one-time password (OTP) sender APIs is provided by Twilio. Twilio offers a free tier that allows you to send a limited number of OTPs per month. You can sign up for a free account to get started.
Twilio Free OTP API
- Website: Twilio
- Features: Secure delivery of OTPs, supports SMS, voice, and email channels, highly reliable.
- Free Tier: Includes a limited number of free OTPs per month.
To use Twilio's OTP API, you need to:
- Sign up for a free Twilio account.
- Verify your phone number.
- Get your Account SID and Auth Token.
- Use Twilio's API to send OTPs.
Example code snippet to send an OTP using Twilio (Python):
python
from twilio.rest import Client
# Your Account SID and Auth Token from twilio.com/console
account_sid = 'your_account_sid'
auth_token = 'your_auth_token'
client = Client(account_sid, auth_token)
message = client.messages.create(
body='Your OTP code is 123456',
from_='+1234567890',
to='+0987654321'
)
print(message.sid)
Note: Remember to replace 'your_account_sid', 'your_auth_token', '+1234567890', and '+0987654321' with your actual Twilio account SID, Auth Token, Twilio phone number, and recipient phone number respectively.
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