Klaviyo
Email and SMS marketing on a B2C CRM, with profiles, events, campaigns and flows.
Updated Sep 27, 2026
Overview
Klaviyo is a B2C marketing platform: profiles and the events they generate drive email and SMS campaigns, automated flows, lists and segments.
The remote MCP server signs in with OAuth and is open to Owner, Admin and
Manager roles; add read-only=true to its URL to turn off every tool that
writes. The klaviyo CLI has a command for every JSON API operation and
takes a private API key (pk_...). The API takes that key as
Authorization: Klaviyo-API-Key <key> plus a revision header with the API
version date, such as 2026-07-15; the CLI sends both for you.
Workflows
Workflows that use Klaviyo's tools.
Tools
What agents can reach at Klaviyo.
Create a campaignCreates a campaign for the lists and segments you include, with its messages and send strategy, and returns it.
- Create an event
Records one event, such as a purchase, against a profile and creates or updates that profile.
- Send a campaign
Starts an asynchronous job that sends a campaign to its configured audience.
- Subscribe profiles to marketing
Records marketing consent for up to 1,000 profiles on email, SMS, WhatsApp or push, optionally adding them to a list.
- Create or update a profile
Creates a profile or updates the one that matches, with contact details, location and custom properties.