The best email marketing MCP servers

An email marketing MCP server connects Claude, ChatGPT, Cursor or another agent to a newsletter, ecommerce or cold email platform: subscribers, campaigns, sequences, reporting, and, on some servers, sending. That is a different job from finding prospects and verified work emails. The wider set of marketing servers sits in the best MCP servers for marketing.

Prices below were checked in November 2026.

Email marketing MCP servers compared

Newsletter and ecommerce platforms

Klaviyo

Klaviyo's MCP server is official. Klaviyo recommends the remote server at https://mcp.klaviyo.com/mcp over Streamable HTTP, with OAuth and dynamic client registration. You need an Owner, Admin or Manager role. Claude has a listed connector. ChatGPT has a Klaviyo app. Cursor and VS Code add the same URL. Query parameters (read-only=true, toolsets, core-tools-only) work only on a custom connector. Agencies add one custom connector per account and pass ?company=.

Your agent pulls last month's flow revenue, compares campaigns, or creates an email campaign when the write tools are on. The product page lists campaigns, flows, profiles, reporting, catalogs and events.

A separate local server runs with uvx klaviyo-mcp-server@latest. The env vars it needs are PRIVATE_API_KEY, READ_ONLY and ALLOW_USER_GENERATED_CONTENT:

{
  "mcpServers": {
    "klaviyo": {
      "command": "uvx",
      "args": ["klaviyo-mcp-server@latest"],
      "env": {
        "PRIVATE_API_KEY": "YOUR_API_KEY",
        "READ_ONLY": "false",
        "ALLOW_USER_GENERATED_CONTENT": "false"
      }
    }
  }
}

Best for: Ecommerce flows and campaign reporting in Claude or ChatGPT, with writes you can turn off on a custom connector.

Mailchimp

"Mailchimp MCP" is three separate things.

The Mailchimp app in Claude and ChatGPT plans and drafts campaigns from your Mailchimp data and saves them so you launch in Mailchimp. Mailchimp says the app is available in the US, Canada, UK and Australia. Connectors sit on Standard and Premium plans (check your plan if those pages disagree).

Mailchimp Transactional (Mandrill) MCP is a different server at https://mandrillapp.com/mcp. You send a Transactional API key as a Authorization: Bearer header. It mirrors the Transactional API: account status, templates, API calls, failed-send diagnosis. It can send transactional mail. It does not send marketing campaigns.

A docs MCP at https://mailchimp.com/developer/_mcp/server searches Mailchimp's developer docs. It does not touch your account and needs no Mailchimp credential.

Best for: Drafting Mailchimp campaigns in Claude or ChatGPT, or sending transactional mail through Mandrill. Not one official marketing MCP that launches newsletters from the agent.

MailerLite

MailerLite's official MCP is hosted at https://mcp.mailerlite.com/mcp. You sign in with OAuth. There is no API key. The help center installs it as a ChatGPT plugin, and also documents Claude, VS Code and Cursor. Claude Code:

claude mcp add --transport http mailerlite https://mcp.mailerlite.com/mcp

Your agent manages subscribers, groups, campaigns and automations. Pricing puts MCP on Free with limits and no sending. Sending through the API and MCP is on paid plans. Comfort starts at $12/month. Power starts at $25/month.

Best for: Newsletters for a small business that wants OAuth and sending on a paid plan.

Kit

Kit MCP is hosted at https://app.kit.com/mcp. You sign in with OAuth. It is on paid Creator and Creator Pro plans. Kit's help center documents Claude, ChatGPT and Cursor. Free creators can connect and see the tools; running one asks them to upgrade.

Your agent reads subscribers, tags, sequences and broadcasts, and can draft a broadcast. Kit's developer docs say the MCP does not schedule or send. Each draft comes back with a confirm_url so you finish it in Kit.

Best for: Creators who want the agent to draft broadcasts and leave sending in Kit.

Brevo

Brevo has two official paths.

The Claude connector is listed in Claude. You sign in with OAuth. No API key. Claude drafts email and SMS campaigns that you review and send in Brevo. Brevo says the connector never sends, schedules or deletes.

The Brevo MCP server is hosted at https://mcp.brevo.com/v1/brevo/mcp. You create an MCP API key under SMTP and API, then API Keys, with "Create MCP server API key", and send it as a Bearer header. Brevo's help center documents Claude Desktop, Claude Code, Cursor, Windsurf, VS Code and Cline. The product page says this server can send campaigns. You can point at a smaller module URL if you only want contacts or campaign analytics.

Best for: Teams already on Brevo. Use the Claude connector for drafts. Use the MCP server when you want the full account, sending included.

Cold email and outbound platforms

Instantly

Instantly MCP is Instantly's official hosted server at https://mcp.instantly.ai/mcp. Instantly documents Streamable HTTP. You send an API key in the Authorization header, or in the URL path if the client cannot set headers. The help center covers Claude, Cursor and n8n. Instantly does not document ChatGPT.

Your agent works on campaigns, leads, analytics, inbox replies and sending accounts. Instantly says the MCP server is free with your subscription, and that you need an account with API access.

Best for: Cold email at volume when the campaigns already live in Instantly.

Smartlead

Smartlead documents two setups. The help center is the current one: SSE only, Claude Desktop, through npx -y mcp-remote (Node.js required). The key sits in the URL:

npx -y mcp-remote https://mcp.smartlead.ai/sse?user_api_key=YOUR_API_KEY

Smartlead's setup blog shows a local npx -y @smartlead/mcp-server with SMARTLEAD_API_KEY in the env. Both exist. Follow the help center unless you want the key on your machine.

The blog says you need a paid Smartlead plan. The help center has Claude Desktop only; it says the web app is not supported yet. Your agent fetches campaign insights, lead and account data, and deliverability checks. Sending from the agent is not documented on the help center.

Best for: Cold email reporting in Claude Desktop when you already pay for Smartlead.

lemlist

lemlist's official MCP is hosted at https://app.lemlist.com/mcp. OAuth is recommended. You can also send an X-API-Key header. The help center documents Claude, Claude Code, Cursor, ChatGPT and Codex. ChatGPT has a lemlist plugin. With OAuth, do not name the server lemlist (lemlist refuses that client name). Claude Code:

claude mcp add --transport http lm https://app.lemlist.com/mcp

Your agent works on campaigns, leads, inbox, LinkedIn and calls. lemlist can start a campaign. ChatGPT asks you to confirm before a send, a credit spend or a campaign change.

Best for: Multichannel outbound (email, LinkedIn, calls) with OAuth and an approve step on sends.

Integration layers

Zapier's Mailchimp MCP is the Mailchimp app inside Zapier MCP. You connect Zapier to Claude, ChatGPT or Cursor, connect Mailchimp in Zapier, and the agent finds the action. Zapier lists campaign drafts, Send Campaign, subscribers and reports. Zapier MCP is included in every Zapier plan. Each tool call uses two tasks.

Composio's Klaviyo toolkit wraps Klaviyo for agents that already use Composio. Composio lists a free Hobby plan (checked November 2026). Your Klaviyo plan still applies.

Best for: One connector across many apps, when you already pay for Zapier or Composio.

How to choose

Ecommerce flows and revenue reporting. Use Klaviyo.

Newsletters for a small business. Use MailerLite, and send on a paid plan.

Creators. Use Kit if drafts in the chat and sending in Kit is the workflow you want.

Transactional email. Use Mailchimp Transactional.

Cold email at volume. Use Instantly MCP or Smartlead, matching the platform you already run.

Multichannel outbound. Use lemlist.

Agency with many client accounts. Use Klaviyo custom connectors with ?company= on each URL.

One connector across many apps. Use Zapier or Composio.

If the list is going into a CRM first, HubSpot MCP and Attio MCP cover those workspaces.

Manifold MCP

Manifold MCP is hosted, with no API keys of your own, and you pay per call. It does not connect to or send from your email platform.

It is the research and list-building server you pair with one of the servers above. Your agent finds companies and the people who work there, then finds and verifies their work emails with leads_search_companies, leads_search_people, leads_get_email and leads_get_domain_emails. It can also read what a market says on Reddit or LinkedIn before it drafts the campaign. See the leads tools, build a lead list and find work emails. For the prospecting servers themselves, see the best lead generation MCP servers.

Every workspace gets 250 free credits a month, and Pro starts at $20/mo. Setup is in the Claude and ChatGPT docs.

Best for: Lead research in Claude or ChatGPT, paid per call, next to the email platform you already use.

More on this topic sits under lead research articles.