# How to connect Klaviyo MCP to Claude ```json { "title": "How to connect Klaviyo MCP to Claude", "toolkit": "Klaviyo MCP", "toolkit_slug": "klaviyo_mcp", "framework": "Claude Cowork", "framework_slug": "claude-cowork", "url": "https://composio.dev/toolkits/klaviyo_mcp/framework/claude-cowork", "markdown_url": "https://composio.dev/toolkits/klaviyo_mcp/framework/claude-cowork.md", "updated_at": "2026-09-24T15:43:42.575Z" } ``` ## 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 - [ChatGPT](https://composio.dev/toolkits/klaviyo_mcp/framework/chatgpt) - [Hermes](https://composio.dev/toolkits/klaviyo_mcp/framework/hermes-agent) - [Atomic Agent](https://composio.dev/toolkits/klaviyo_mcp/framework/atomic-agent) ## Connect Klaviyo MCP to Claude Cowork ### 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](https://claude.ai/customize/connectors?modal=add-custom-connector&connectorName=Composio&connectorUrl=https%3A%2F%2Fconnect.composio.dev%2Fmcp) ### Add manually In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top. Click Add custom connector and paste in the Composio MCP server URL: ```bash https://connect.composio.dev/mcp ``` ## What is the Klaviyo MCP server, 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. ## Supported Tools None listed. ## Supported Triggers None listed. ## 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. ## Creating MCP Server - Stand-alone vs Composio SDK The Klaviyo MCP server connects Claude Web, Desktop, and Cowork to your Klaviyo account through Composio. Once connected, Claude can use the available Klaviyo tools and triggers to complete tasks on your behalf. ## Complete Code None listed. ## How to build Klaviyo MCP Agent with another framework - [ChatGPT](https://composio.dev/toolkits/klaviyo_mcp/framework/chatgpt) - [Hermes](https://composio.dev/toolkits/klaviyo_mcp/framework/hermes-agent) - [Atomic Agent](https://composio.dev/toolkits/klaviyo_mcp/framework/atomic-agent) ## Related Toolkits - [Reddit](https://composio.dev/toolkits/reddit) - Reddit is a social news platform with thriving user-driven communities (subreddits). It's the go-to place for discussion, content sharing, and viral marketing. - [Facebook](https://composio.dev/toolkits/facebook) - Facebook is a social media and advertising platform for businesses and creators. It helps you connect, share, and manage content across your public Facebook Pages. - [Linkedin](https://composio.dev/toolkits/linkedin) - LinkedIn is a professional networking platform for connecting, sharing content, and engaging with business opportunities. It's the go-to place for building your professional brand and unlocking new career connections. - [Active campaign](https://composio.dev/toolkits/active_campaign) - ActiveCampaign is a marketing automation and CRM platform for managing email campaigns, sales pipelines, and customer segmentation. It helps businesses engage customers and drive growth through smart automation and targeted outreach. - [ActiveTrail](https://composio.dev/toolkits/active_trail) - ActiveTrail is a user-friendly email marketing and automation platform. It helps you reach subscribers and automate campaigns with ease. - [Adobe Marketing Agent MCP](https://composio.dev/toolkits/adobe_marketing_agent_mcp) - Adobe Marketing Agent MCP is Adobe's hosted MCP service that exposes marketing context, preferences, and agent capabilities. Use it to provide agents with campaign, audience, and analytics context via a managed integration. - [Ahrefs](https://composio.dev/toolkits/ahrefs) - Ahrefs is an SEO and marketing platform for site audits, keyword research, and competitor insights. It helps you improve search rankings and drive organic traffic. - [AimTell](https://composio.dev/toolkits/aimtell) - AimTell is a web push notification platform for managing websites, subscribers, campaigns, segments, and delivery analytics. Use it to send targeted browser notifications and measure engagement across your web push campaigns. - [Amcards](https://composio.dev/toolkits/amcards) - AMCards lets you create and mail personalized greeting cards online. Build stronger customer relationships with easy, automated card campaigns. - [AWeber](https://composio.dev/toolkits/aweber) - AWeber is an email marketing platform for creating campaigns, lists, and landing pages. It helps businesses automate email outreach and measure subscriber engagement. - [Beamer](https://composio.dev/toolkits/beamer) - Beamer is a news and changelog platform for in-app announcements and feature updates. It helps companies boost user engagement by sharing news where users are most active. - [Beehiiv](https://composio.dev/toolkits/beehiiv) - Beehiiv is a newsletter platform for creating and managing publications and subscribers. It helps grow audience engagement and monetize your mailing list. - [Benchmark email](https://composio.dev/toolkits/benchmark_email) - Benchmark Email is a platform for creating, sending, and tracking email campaigns. It's built to help you engage audiences and analyze results—all in one place. - [Bigmailer](https://composio.dev/toolkits/bigmailer) - BigMailer is an email marketing platform for managing multiple brands with white-labeling and automation. It helps teams streamline campaigns and simplify integration with Amazon SES. - [Bitly](https://composio.dev/toolkits/bitly) - Bitly is a link management platform for shortening, customizing, sharing, and tracking links and QR codes. It helps teams create branded links and measure engagement across campaigns. - [BlueFox Email](https://composio.dev/toolkits/bluefox_email) - BlueFox Email is an email API for managing contacts, subscriber lists, and sending transactional and triggered messages. Use it to reliably send transactional and triggered emails and manage subscribers at scale. - [Brandfetch](https://composio.dev/toolkits/brandfetch) - Brandfetch is an API that delivers company logos, colors, and visual branding assets. It helps marketers and developers keep brand visuals consistent everywhere. - [Braze](https://composio.dev/toolkits/braze) - Braze is a customer engagement platform for managing user data, messaging, campaigns, and analytics. Use it to deliver targeted, multi-channel messaging and analyze campaign performance. - [Brevo](https://composio.dev/toolkits/brevo) - Brevo is an all-in-one email and SMS marketing platform for transactional messaging, automation, and CRM. It helps businesses engage customers and streamline communications through powerful campaign tools. - [Buffer](https://composio.dev/toolkits/buffer) - Buffer is a social media management platform for planning, creating, scheduling, and publishing posts across connected channels. It helps teams keep content organized and publish consistently without jumping between social apps. ## Frequently Asked Questions ### What are the differences in Tool Router MCP and Klaviyo MCP? 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. ### Can I use Tool Router MCP with Claude Cowork? 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. ### Can I manage the permissions and scopes for Klaviyo while using Tool Router? 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. ### How safe is my data with Composio Tool Router? 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. --- [See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)