Quickstart
Send and verify a code in 2 minutes and 3 simple steps with our SDKs, available for many popular languages to make your life easier.
Get the SDK
We provide SDKs for many popular languages to make your life easier.
Want to see another language make its way to the list? Tell us
Initialize the SDK
Initialize the SDK by pasting the snippet below.
Get YOUR_API_KEY and YOUR_CUSTOMER_UUID from the Settings > API page of your
Dashboard.
Send a code
Call the Authentication endpoint with your phone number. You will receive a code by SMS.
In production, we recommend storing the authentication_uuid in a distributed cache like Redis between send and check calls if you use a stateless backend.
Verify the code
Call the Check endpoint with the authentication_uuid
returned by the previous call and the code you received.
Congratulations, you’ve just integrated Prelude!. Now, you can go to the Dashboard and see your OTP codes in the Authentications tab.
Going further
Here are a few more steps before moving on to production:
Test your integration
To make sure your integration is correct, use test numbers in your automated tests. Add them in the Settings > API tab.
Add fraud signals
Add Signals such as ip_address,
app_version and is_returning_user to your
Authentication requests to better prevent
fraud and reduce your expenses.
Plug your webhook
Listen to Webhook events to get notified when an OTP is sent or billed.
Next steps
Get more in-depth with our guides to prepare your integration for production:
API Reference
Learn more about Prelude’s API endpoints.