# One Time Passwords

![](/files/-MC7sySD9ZNawoyBMNxf)

## OTP (One-Time Password) Delivery Methods 

{% hint style="info" %}
**NOTE:** When reviewing the API documentation for both methods notice that they are almost identical except for the service name and and the option to edit the message sent. So, really only one integration is required with minor logic to adjust to either call or SMS. 
{% endhint %}

There are two methods to send an OTP to a user's phone. Click below to view documentation 

{% content-ref url="/pages/-LrtNBwpOkNk4AGCUMix" %}
[SMS](/phone-verification-and-validation/one-time-passwords/sms-otp.md)
{% endcontent-ref %}

{% content-ref url="/pages/-LrtN\_Mq-G8CSd1xZ5vu" %}
[Call](/phone-verification-and-validation/one-time-passwords/call-otp.md)
{% endcontent-ref %}


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