Questions

Which type of API key do you need in order to use a client-side API?

• Private API key
• Public API key
• Either one works

 

Explanation: In the world of web development, “client-side” refers to anything running directly in the user’s browser. Because browser code is visible to anyone who right-clicks and selects “View Source,” security protocols dictate which keys can be exposed there. The Role of the Public API Key. The Public API key (also known as a Site ID in Klaviyo) is designed to be shared openly. It is a “write-only” identifier that allows the browser to send data to a specific account without the risk of someone using it to steal data from that account.

 

What are the two ways that you can hit a rate limit for an API?

• Hit the steady limit or enter a malformed payload
• Hit the burst limit or hit the steady limit
• Hit the burst limit or use the wrong type of API key

 

Explanation: API rate limits are essentially “speed bumps” designed to protect a server’s health and ensure fair resource distribution among all users. Most sophisticated APIs, including Klaviyo’s, use a multi-tiered system to manage traffic flow.

 

When building a custom integration, what key step allows you to track onsite activity?

• Creating a Klaviyo test account
• Installing a code snippet called klaviyo.js on your site’s front end
• Creating a private API key in Klaviyo

 

Explanation: The correct answer is Installing a code snippet called klaviyo.js on your site’s front end. Why this is the key step While API keys are essential for moving data between servers, klaviyo.js (often referred to as the “Active on Site” tracking snippet) is what bridges the gap between a visitor’s browser and your Klaviyo account.

 

Two customers just placed orders, and Beth, a Klaviyo developer, wants to send both of these Placed Order events to Klaviyo. How can she do this?

• Create 1 event server-side that will be sent to both profiles
• Create 2 separate events server-side, one for each customer
• Create a client-side event that will be sent to both profiles

 

Explanation: In Klaviyo’s data architecture, an Event is a discrete action tied to a specific Profile. Because events represent individual customer journeys, they cannot be “shared” or sent in bulk as a single multi-user event.

 

What is the main benefit of using a test Klaviyo account?

• Test accounts provide you access to developer-specific support
• Developer tools are only available in designated test accounts
• You can make API calls without affecting production data

 

Explanation: The primary purpose of a test (or “sandbox”) account is to provide a safe environment for experimentation. When you are building custom integrations or writing scripts to automate data management, you are essentially working with “live” code that can have immediate consequences.

 

In which of the following cases would you use a client-side API?

• To retrieve all of the lists that a profile is subscribed to
• To log a user’s site browsing activity on their Klaviyo profile
• To create a Placed Order event when a customer places an order on your site

 

Explanation: The choice between a client-side and server-side API in Klaviyo depends primarily on where the data is coming from and how secure that data needs to be. Front-End Interaction: Client-side APIs (like klaviyo.js) are designed to run in the user’s browser. This makes them perfect for tracking real-time onsite behavior—such as Active on Site, Viewed Product, or Clicked Banner—because the code can easily “see” what the user is doing on the page. Public Authentication: These calls use your Public API Key (or Site ID). Since this key is visible in your website’s source code, it is restricted to low-sensitivity actions. You wouldn’t want to use it for sensitive data, but it’s ideal for high-volume, behavioral tracking. Real-Time Identification: Client-side tracking allows Klaviyo to instantly associate a browser’s “anonymous” cookies with a specific profile once they identify themselves (e.g., by clicking an email link or filling out a form).