Expanded API Endpoints for Powerful Experiences

Klaviyo is committed to improving the experience for developers.

In 2022, Klaviyo released:

An improved developer portal making it easier to source developer-specific information so Klaviyo devs can get started, faster.
A revamped API surface focusing on extensibility, scale, and connectivity to enable developers to build powerful experiences with Klaviyo.
New developer tools to enhance the onboarding and building experience when you’re looking to create a new experience on top of Klaviyo.
Established a developer community to provide networking, support, and marketing opportunities for Klaviyo developers to expand their businesses.

Today, we’re excited to announce Klaviyo’s API endpoint expansion enabling developers to build a wider array of personalized experiences.

Newly released endpoints: Tags, Data Privacy, and Campaigns APIs

We’re excited to release full CRUD functionality for our Tags API (in general availability), Data Privacy API (in general availability), and Campaigns API (open beta).

Tags API

Overview: Klaviyo’s tags can be used to group related Klaviyo components (e.g. group different types of campaigns such as product releases or announcements; group different lists together under a theme, such as holiday lists). Now you can integrate existing tags-based workflows into automations you build with our APIs by accessing tags, tag groups, and all related tagged items – like flows, campaigns, and more.
Example: Brands can effectively access, organize, and update tags by using new CRUD operations to manage resources including campaigns and flows based on tags and tag groups.

Campaigns API

Overview: Developers will soon be able to programmatically create, update, and send email campaigns as well as make updates and check deliverability of said campaign during launch.
Example: As a partner working with a brand, you can now programmatically create, update, and send email campaigns, make updates and check deliverability of campaigns during launch ensuring it aligns with your launch plan.

Data Privacy API

Overview: Begin deleting a brand’s subscriber data depending on their affiliated marketing channel and company.
Example: To adhere to GDPR, you can now delete profile records for GDPR “right to be forgotten” requests to stay compliant with your marketing messaging.

Get started today

Visit the API docs to get started building or click here to learn more about transitioning to Klaviyo’s new API endpoints!

Justin Fink

Set as Preferred Source

Related content

Klaviyo news

Jun 3, 2026

Customer Agent now speaks your customers' language

Multilingual Customer Agent automatically detects and responds in 100+ languages across web chat, email, SMS, and WhatsApp. Configure once, serve every market.

Klaviyo news

Jun 3, 2026

Personalized product recommendations now available in text

Your email sends each subscriber a different, personalized product recommendation. Now your texts do too. See how dynamic product feeds work in SMS and RCS.

Klaviyo news

Jun 3, 2026

Channel affinity now includes WhatsApp

Channel affinity now predicts WhatsApp preferences. Lead with the right channel for each customer and follow up smarter across email, SMS, WhatsApp, and push.

# Expanded API endpoints & transitioning to Klaviyo’s new APIs Klaviyo is committed to improving the experience for developers. In 2022, Klaviyo released: - An improved developer portal making it easier to source developer-specific information so Klaviyo devs can get started, faster. - A revamped API surface focusing on extensibility, scale, and connectivity to enable developers to build powerful experiences with Klaviyo. - New developer tools to enhance the onboarding and building experience when you’re looking to create a new experience on top of Klaviyo. - Established a developer community to provide networking, support, and marketing opportunities for Klaviyo developers to expand their businesses. Today, we’re excited to announce Klaviyo’s API endpoint expansion enabling developers to build a wider array of personalized experiences. ## Newly released endpoints: Tags, Data Privacy, and Campaigns APIs We’re excited to release full CRUD functionality for our Tags API (in general availability), Data Privacy API (in general availability), and Campaigns API (open beta). ### Tags API - **Overview:** Klaviyo’s tags can be used to group related Klaviyo components (e.g. group different types of campaigns such as product releases or announcements; group different lists together under a theme, such as holiday lists). Now you can integrate existing tags-based workflows into automations you build with our APIs by accessing tags, tag groups, and all related tagged items – like flows, campaigns, and more. - **Example:** Brands can effectively access, organize, and update tags by using new CRUD operations to manage resources including campaigns and flows based on tags and tag groups. ### Campaigns API - **Overview:** Developers will soon be able to programmatically create, update, and send email campaigns as well as make updates and check deliverability of said campaign during launch. - **Example:** As a partner working with a brand, you can now programmatically create, update, and send email campaigns, make updates and check deliverability of campaigns during launch ensuring it aligns with your launch plan. ### Data Privacy API - **Overview:** Begin deleting a brand’s subscriber data depending on their affiliated marketing channel and company. - **Example:** To adhere to GDPR, you can now delete profile records for GDPR “right to be forgotten” requests to stay compliant with your marketing messaging. ## Get started today Visit the [API docs](https://developers.klaviyo.com/en/reference/api_overview) to get started building or [click here](https://medium.com/klaviyo-developers/recap-release-whats-new-for-klaviyo-developers-january-2023-df0737ade23c) to learn more about transitioning to Klaviyo’s new API endpoints!