Connect

8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

{
  "mcpServers": {
    "mailchimp-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/[email protected]"
      ],
      "env": {
        "MAILCHIMP_API_KEY": "${MAILCHIMP_API_KEY}",
        "MAILCHIMP_TIMEOUT_MS": "60000",
        "MAILCHIMP_MAX_RETRIES": "3",
        "MAILCHIMP_CONCURRENCY_LIMIT": "4",
        "MCP_LOG_LEVEL": "info"
      }
    }
  }
}

claude mcp add mailchimp-mcp-server -e "MAILCHIMP_API_KEY=${MAILCHIMP_API_KEY}" -e "MAILCHIMP_TIMEOUT_MS=60000" -e "MAILCHIMP_MAX_RETRIES=3" -e "MAILCHIMP_CONCURRENCY_LIMIT=4" -e "MCP_LOG_LEVEL=info" -- npx -y @cyanheads/[email protected]

[mcp_servers.mailchimp-mcp-server]
command = "npx"
args = ["-y", "@cyanheads/[email protected]"]
env = { "MAILCHIMP_API_KEY" = "${MAILCHIMP_API_KEY}", "MAILCHIMP_TIMEOUT_MS" = "60000", "MAILCHIMP_MAX_RETRIES" = "3", "MAILCHIMP_CONCURRENCY_LIMIT" = "4", "MCP_LOG_LEVEL" = "info" }

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "mailchimp-mcp-server": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@cyanheads/[email protected]"
      ],
      "enabled": true,
      "environment": {
        "MAILCHIMP_API_KEY": "{env:MAILCHIMP_API_KEY}",
        "MAILCHIMP_TIMEOUT_MS": "60000",
        "MAILCHIMP_MAX_RETRIES": "3",
        "MAILCHIMP_CONCURRENCY_LIMIT": "4",
        "MCP_LOG_LEVEL": "info"
      }
    }
  }
}

{
  "mcpServers": {
    "mailchimp-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/[email protected]"
      ],
      "env": {
        "MAILCHIMP_API_KEY": "${MAILCHIMP_API_KEY}",
        "MAILCHIMP_TIMEOUT_MS": "60000",
        "MAILCHIMP_MAX_RETRIES": "3",
        "MAILCHIMP_CONCURRENCY_LIMIT": "4",
        "MCP_LOG_LEVEL": "info"
      }
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=mailchimp-mcp-server&config=eyJjb21tYW5kIjoibnB4IiwiYXJncyI6WyIteSIsIkBjeWFuaGVhZHMvbWFpbGNoaW1wLW1jcC1zZXJ2ZXJAMC40LjAiXSwiZW52Ijp7Ik1BSUxDSElNUF9BUElfS0VZIjoiJHtNQUlMQ0hJTVBfQVBJX0tFWX0iLCJNQUlMQ0hJTVBfVElNRU9VVF9NUyI6IjYwMDAwIiwiTUFJTENISU1QX01BWF9SRVRSSUVTIjoiMyIsIk1BSUxDSElNUF9DT05DVVJSRU5DWV9MSU1JVCI6IjQiLCJNQ1BfTE9HX0xFVkVMIjoiaW5mbyJ9fQ%3D%3D"
}

{
  "servers": {
    "mailchimp-mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/[email protected]"
      ],
      "env": {
        "MAILCHIMP_API_KEY": "${MAILCHIMP_API_KEY}",
        "MAILCHIMP_TIMEOUT_MS": "60000",
        "MAILCHIMP_MAX_RETRIES": "3",
        "MAILCHIMP_CONCURRENCY_LIMIT": "4",
        "MCP_LOG_LEVEL": "info"
      }
    }
  }
}

{
  "mcpServers": {
    "mailchimp-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/[email protected]"
      ],
      "env": {
        "MAILCHIMP_API_KEY": "${MAILCHIMP_API_KEY}",
        "MAILCHIMP_TIMEOUT_MS": "60000",
        "MAILCHIMP_MAX_RETRIES": "3",
        "MAILCHIMP_CONCURRENCY_LIMIT": "4",
        "MCP_LOG_LEVEL": "info"
      }
    }
  }
}

extensions:
  "mailchimp-mcp-server":
    enabled: true
    name: "mailchimp-mcp-server"
    type: stdio
    cmd: "npx"
    args:
      - "-y"
      - "@cyanheads/[email protected]"
    envs:
      "MAILCHIMP_API_KEY": "${MAILCHIMP_API_KEY}"
      "MAILCHIMP_TIMEOUT_MS": "60000"
      "MAILCHIMP_MAX_RETRIES": "3"
      "MAILCHIMP_CONCURRENCY_LIMIT": "4"
      "MCP_LOG_LEVEL": "info"
    timeout: 300

This is a local package: the command runs on your machine.

Quality – / 100not scored

Not scored: fewer than three checks apply, usually because no remote answered a credential-free probe or the server is a local package.

protocoln/a · weight 25

n/a
protocol.modern, protocol.stateless, protocol.transport, protocol.list_ttlno remote answered a protocol handshake (not probed yet, unreachable, or local-only)

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygienen/a · weight 30

n/a
tools.descriptions, tools.description_length, tools.schemas, tools.annotations, tools.directory_hints, tools.token_cost, tools.api_dumptool list unknown (behind auth, not probed, or empty)

stabilityn/a · weight 15

n/a
stability.changes, stability.rug_pulltool list unknown

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvabledeps.dev does not know @cyanheads/[email protected], @cyanheads/[email protected]

Tool list unknown · checked 2026-10-19 10:20 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 91 / 100

provenance80

livenessn/a

freshness100

hygiene100

+repository +namespace-matches-repo ~liveness-unmeasured +updated-6d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Dependencies

@cyanheads/[email protected] npmthis version is not known to the dependency resolver

Dependency graphs from deps.dev; advisories from OSV.dev, including the GitHub Advisory Database and the PyPI Advisory Database; all CC BY 4.0. The graph is what a clean install of this version resolves today; nothing was installed or run. How it is checked.

Endpoints

package	registry	version	runtime	secrets
`@cyanheads/mailchimp-mcp-server`	npm	0.4.0	npx
`@cyanheads/mailchimp-mcp-server`	npm	0.4.0	npx

Tools (0)

No tools observed. Local packages are never executed by the registry.

Schemas: list_tools.

Similar MCP servers

More from io.github.cyanheads

And 136 more from this publisher.

Official server.json

{
  "name": "io.github.cyanheads/mailchimp-mcp-server",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "version": "0.4.0",
  "packages": [
    {
      "version": "0.4.0",
      "transport": {
        "type": "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."
        }
      ]
    },
    {
      "version": "0.4.0",
      "transport": {
        "url": "http://localhost:3010/mcp",
        "type": "streamable-http"
      },
      "identifier": "@cyanheads/mailchimp-mcp-server",
      "runtimeHint": "npx",
      "registryType": "npm",
      "registryBaseUrl": "https://registry.npmjs.org",
      "environmentVariables": [
        {
          "name": "MCP_TRANSPORT_TYPE",
          "value": "http",
          "format": "string",
          "description": "Selects the HTTP transport."
        },
        {
          "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": "MCP_HTTP_HOST",
          "format": "string",
          "default": "127.0.0.1",
          "description": "The hostname for the HTTP server."
        },
        {
          "name": "MCP_HTTP_PORT",
          "format": "string",
          "default": "3010",
          "description": "The port to run the HTTP server on."
        },
        {
          "name": "MCP_HTTP_ENDPOINT_PATH",
          "format": "string",
          "default": "/mcp",
          "description": "The endpoint path for the MCP server."
        },
        {
          "name": "MCP_AUTH_MODE",
          "format": "string",
          "default": "none",
          "description": "Authentication mode to use: 'none', 'jwt', or 'oauth'."
        },
        {
          "name": "MCP_LOG_LEVEL",
          "format": "string",
          "default": "info",
          "description": "Minimum log level for output: debug, info, notice, warning, or error."
        }
      ]
    }
  ],
  "repository": {
    "url": "https://github.com/cyanheads/mailchimp-mcp-server",
    "source": "github"
  },
  "description": "Mailchimp via MCP: draft, test, and send campaigns; manage audiences and subscribers; pull reports."
}