Klaviyo Marketing API: Watch All Universal Content, Add Categories to Catalog Item

About this integration

Email and SMS marketing platform for ecommerce brands. Connect it to any workflow without writing code.

You can choose from 9 triggers, 70 search modules and 58 actions. The connection type is basic or oauth authentication.

How to connect

The credential form asks for Private API Key, API Revision, Client ID, and Client Secret.

OAuth asks you to approve Accounts Read access, Campaigns Read access, and Campaigns Write access before access is granted.

Sign in and approve access — your password is never shared with WEXTL®, and you can revoke access from the provider at any time.

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Enter your credentials below. WEXTL stores them encrypted and uses them only to call the API on your behalf.

You’ll be redirected to sign in and approve access — your password is never shared with WEXTL.

Connecting Klaviyo to WEXTL®

Field	Type	Help
Private API KeyRequired	password	Your Private API Key (starts with pk_). Create one under Settings > API keys.
API RevisionRequired	text	API revision date header (format YYYY-MM-DD). Default: 2026-04-15.

Field	Type	Help
Client IDRequired	text	Your OAuth app's Client ID. In Klaviyo, go to Settings > enable a developer/OAuth integration and follow the 'Set up OAuth' guide (https://developers.klaviyo.com/en/docs/set_up_oauth): create your app, then the Client ID is generated in the app's OAuth settings. Be sure to also add Make's redirect (callback) URI to your app's allowed redirect URIs.
Client SecretRequired	password	Your OAuth app's Client Secret, shown next to the Client ID in your app's OAuth settings when you set up OAuth (https://developers.klaviyo.com/en/docs/set_up_oauth). Copy it to a secure location right away — like private API keys, Klaviyo only reveals it once.
API RevisionRequired	text	API revision date header (format YYYY-MM-DD). Default: 2026-04-15.

Permissions requested

• Accounts Read access
• Campaigns Read access
• Campaigns Write access
• Catalogs Read access
• Catalogs Write access
• Conversations Write access
• Flows Read access
• Flows Write access
• Forms Read access
• Forms Write access
• Images Read access
• Lists Read access
• Lists Write access
• Profiles Read access
• Profiles Write access
• Segments Read access
• Segments Write access
• Tags Read access
• Tags Write access
• Templates Read access
• Templates Write access

Use it in workflow automation

Start with Watch All Universal Content, then add Add Categories to Catalog Item.

The canvas below runs Watch All Universal Content into Add Categories to Catalog Item — watch the video, then drop a node onto the canvas.

Select the Watch Campaigns trigger and the workflow fires automatically when the event occurs — no polling required.

Then add Create Campaign Clone as the next node. Branch, filter, or hand off to other integrations from there.

The integration includes 67 ready-made modules for marketing work — each run logs its inputs and outputs for debugging.

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Klaviyo workflow on the canvas: Watch Campaigns then Create Campaign Clone

Triggers, searches and actions

Explore the fields available for each Klaviyo trigger, search, and action — 9 triggers, 70 searchs, and 58 actions.