Mailchimp MCP

An MCP server enabling agents to draft, test, and send Mailchimp email campaigns, manage audiences and subscribers, and retrieve post-send analytics. It supports STDIO or Streamable HTTP connections and includes tools for audience management, subscriber CRUD, and campaign reporting.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by cyanheads

Vendor documentation

What you can do with it

Draft, test, and send email campaigns
Manage audiences and subscribers
Pull post-send analytics reports

Source and maintenance

Community listingRegistry 0.5.0

mcp-registry: io.github.cyanheads/mailchimp-mcp-server@0.5.0 Source repository

Maintenance checked: Oct 31, 2026, 10:27 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

@cyanheads/mailchimp-mcp-server 0.5.0

npmnpx

@cyanheads/mailchimp-mcp-server package definition

{
  "version": "0.5.0",
  "transport": "stdio",
  "identifier": "@cyanheads/mailchimp-mcp-server",
  "runtimeHint": "npx",
  "registryType": "npm",
  "registryBaseUrl": "https://registry.npmjs.org",
  "environmentVariables": [
    {
      "name": "MAILCHIMP_API_KEY",
      "format": "string",
      "isRequired": true,
      "description": "Mailchimp Marketing API key, including the '-dc' data-center suffix (e.g. 'abc...-us22'). Generate at Mailchimp → Account → Extras → API keys."
    },
    {
      "name": "MAILCHIMP_BASE_URL",
      "format": "string",
      "description": "Override the API base URL (for mock servers or testing). Defaults to 'https://{dc}.api.mailchimp.com/3.0' derived from the API key suffix."
    },
    {
      "name": "MAILCHIMP_TIMEOUT_MS",
      "format": "string",
      "default": "60000",
      "description": "Per-request timeout in milliseconds."
    },
    {
      "name": "MAILCHIMP_MAX_RETRIES",
      "format": "string",
      "default": "3",
      "description": "Max retry attempts for transient upstream failures (0-10)."
    },
    {
      "name": "MAILCHIMP_CONCURRENCY_LIMIT",
      "format": "string",
      "default": "4",
      "description": "Max in-flight upstream requests across this process (1-10)."
    },
    {
      "name": "MAILCHIMP_ASSETS_DIR",
      "format": "string",
      "description": "Absolute path to a local assets directory. When set (Node-only — Workers ignored), enables the `mailchimp_assets` tool and auto-uploads `@assets/<path>` references in campaign HTML to Mailchimp File Manager at send time. Cache at <dir>/.mailchimp-cache.json."
    },
    {
      "name": "MAILCHIMP_TEMPLATES_DIR",
      "format": "string",
      "description": "Absolute path to a local templates directory. When set (Node-only), enables the `mailchimp_local_templates` tool and support for `content.localTemplate` on campaign tools. Templates are `.eta` files with optional YAML frontmatter; legacy `<name>.meta.yaml` sidecars are read when frontmatter is absent. Canonical write path on free-tier Mailchimp."
    },
    {
      "name": "MCP_LOG_LEVEL",
      "format": "string",
      "default": "info",
      "description": "Minimum log level for output: debug, info, notice, warning, or error."
    }
  ]
}

Tools

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No tool definitions available.

Connect from your client

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Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "mailchimp-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/mailchimp-mcp-server@0.5.0"
      ],
      "env": {
        "MAILCHIMP_API_KEY": "<YOUR_MAILCHIMP_API_KEY>",
        "MAILCHIMP_BASE_URL": "<YOUR_MAILCHIMP_BASE_URL>",
        "MAILCHIMP_TIMEOUT_MS": "<YOUR_MAILCHIMP_TIMEOUT_MS>",
        "MAILCHIMP_MAX_RETRIES": "<YOUR_MAILCHIMP_MAX_RETRIES>",
        "MAILCHIMP_CONCURRENCY_LIMIT": "<YOUR_MAILCHIMP_CONCURRENCY_LIMIT>",
        "MAILCHIMP_ASSETS_DIR": "<YOUR_MAILCHIMP_ASSETS_DIR>",
        "MAILCHIMP_TEMPLATES_DIR": "<YOUR_MAILCHIMP_TEMPLATES_DIR>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "mailchimp-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/mailchimp-mcp-server@0.5.0"
      ],
      "env": {
        "MAILCHIMP_API_KEY": "<YOUR_MAILCHIMP_API_KEY>",
        "MAILCHIMP_BASE_URL": "<YOUR_MAILCHIMP_BASE_URL>",
        "MAILCHIMP_TIMEOUT_MS": "<YOUR_MAILCHIMP_TIMEOUT_MS>",
        "MAILCHIMP_MAX_RETRIES": "<YOUR_MAILCHIMP_MAX_RETRIES>",
        "MAILCHIMP_CONCURRENCY_LIMIT": "<YOUR_MAILCHIMP_CONCURRENCY_LIMIT>",
        "MAILCHIMP_ASSETS_DIR": "<YOUR_MAILCHIMP_ASSETS_DIR>",
        "MAILCHIMP_TEMPLATES_DIR": "<YOUR_MAILCHIMP_TEMPLATES_DIR>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "mailchimp-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/mailchimp-mcp-server@0.5.0"
      ],
      "env": {
        "MAILCHIMP_API_KEY": "<YOUR_MAILCHIMP_API_KEY>",
        "MAILCHIMP_BASE_URL": "<YOUR_MAILCHIMP_BASE_URL>",
        "MAILCHIMP_TIMEOUT_MS": "<YOUR_MAILCHIMP_TIMEOUT_MS>",
        "MAILCHIMP_MAX_RETRIES": "<YOUR_MAILCHIMP_MAX_RETRIES>",
        "MAILCHIMP_CONCURRENCY_LIMIT": "<YOUR_MAILCHIMP_CONCURRENCY_LIMIT>",
        "MAILCHIMP_ASSETS_DIR": "<YOUR_MAILCHIMP_ASSETS_DIR>",
        "MAILCHIMP_TEMPLATES_DIR": "<YOUR_MAILCHIMP_TEMPLATES_DIR>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "mailchimp-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/mailchimp-mcp-server@0.5.0"
      ],
      "env": {
        "MAILCHIMP_API_KEY": "<YOUR_MAILCHIMP_API_KEY>",
        "MAILCHIMP_BASE_URL": "<YOUR_MAILCHIMP_BASE_URL>",
        "MAILCHIMP_TIMEOUT_MS": "<YOUR_MAILCHIMP_TIMEOUT_MS>",
        "MAILCHIMP_MAX_RETRIES": "<YOUR_MAILCHIMP_MAX_RETRIES>",
        "MAILCHIMP_CONCURRENCY_LIMIT": "<YOUR_MAILCHIMP_CONCURRENCY_LIMIT>",
        "MAILCHIMP_ASSETS_DIR": "<YOUR_MAILCHIMP_ASSETS_DIR>",
        "MAILCHIMP_TEMPLATES_DIR": "<YOUR_MAILCHIMP_TEMPLATES_DIR>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

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