SIGN UPLOG IN
X (Twitter)LinkedInGitHubDiscordYouTube

How to connect Klaviyo MCP to Claude

Connect Claude Web, Desktop and Cowork to Klaviyo MCP. Segment customers who purchased last month, create welcome email flow for new subscribers, and more using natural language, with authentication handled for you.

Get started for freeGet a demo
Klaviyo MCP logoKlaviyo MCP
Dcr Oauth

Klaviyo is a marketing automation platform for email, SMS, and customer data. Use it to segment audiences and run targeted campaigns with analytics.

Introduction

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your Klaviyo account to Claude via Composio Connect, enabling it to segment customers who purchased last month, create welcome email flow for new subscribers, list top performing campaigns this quarter, and more such actions on your behalf without compromising your account security.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

Also integrate Klaviyo MCP with

ChatGPTHermesAtomic Agent

Connecting Klaviyo to Claude Web, Desktop, and Cowork

Two ways to add the Composio connector. Pick whichever you prefer.

1. Add with one click

Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2.

Add to Claude

Add manually

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

2. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Web, Desktop, and Cowork

3. Connect your Klaviyo account

Back in Claude, ask it to connect to Klaviyo or give it any Klaviyo-related task.

For example, ask Claude to:

  • "Segment customers who purchased last month"
  • "Create welcome email flow for new subscribers"
  • "List top performing campaigns this quarter"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Claude, and your Klaviyo account is ready to use.

What is the Klaviyo Claude Connector, and what's possible with it?

The Klaviyo MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Klaviyo account. It provides structured and secure access so your agent can perform Klaviyo operations on your behalf.

Troubleshooting

1. Why does Claude not use the Composio connector for Klaviyo?

The connector can show as connected, but Claude must use it in each Klaviyo conversation.

  • Click + at the lower left of the chat, or type /.
  • Hover Connectors.
  • Turn on Composio.
  • Ask Claude to connect to Klaviyo again.

2. Why does Claude show an MCP server error before Klaviyo connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for Klaviyo.

  • Check that the connector URL is https://connect.composio.dev/mcp.
  • Connectors run from Anthropic's cloud, so your device network is usually not the problem.
  • Add the connector again from Customize > Connectors, then ask Claude to connect Klaviyo.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Klaviyo authorization link not work?

The Composio connector is one server. Your Klaviyo account connects separately when Claude asks for it.

  • If the browser does not open, or the link expires, ask Claude to retry the Klaviyo connection.
  • Composio creates a fresh Klaviyo authorization link.
  • Open that link in your browser and finish the Klaviyo sign-in.

4. Why do Klaviyo actions fail after they worked before?

The Klaviyo connection can expire or lose permission.

  • Ask Claude to inspect the Klaviyo connection.
  • If the connection is unhealthy, disconnect it when Claude prompts you.
  • Reconnect the Klaviyo account and retry the action.
  • If Claude shows a permission prompt, approve it before Claude changes data in Klaviyo.
  • If the action still fails with a permission error, check that the connected account has that permission in Klaviyo itself.

5. How do I switch to a different Klaviyo account?

Claude can manage the Klaviyo connection for you.

  • Ask Claude to disconnect or delete the current Klaviyo account.
  • Ask Claude to connect Klaviyo again.
  • Open the new Composio authorization link for Klaviyo.
  • Sign in with the other Klaviyo account in the browser.
  • After the account connects, ask Claude to retry the Klaviyo task.

6. Why is my Klaviyo connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your Klaviyo connection works in Claude Web, Desktop, and Cowork.

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Klaviyo tools still do not appear, click ⋮, disconnect, remove the connector, and add it again.
  • On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect Klaviyo.
FRAMEWORKS

How to build Klaviyo MCP Agent with another framework

ChatGPT logo

ChatGPT

Use Klaviyo MCP with ChatGPT

Hermes logo

Hermes

Use Klaviyo MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Klaviyo MCP with Atomic Agent

FAQ

Frequently asked questions

With a standalone Klaviyo MCP server, the agents and LLMs can only access a fixed set of Klaviyo tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Klaviyo and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Claude Cowork fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Klaviyo tools.

Yes, absolutely. You can configure which Klaviyo scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Klaviyo data and credentials are handled as safely as possible.

Start with Klaviyo MCP.It takes 30 seconds.

Managed auth, hosted MCP servers, and every Klaviyo MCP tool your agent needs.Free to start.

Start building