# Mailercloud

```json
{
  "name": "Mailercloud",
  "slug": "mailercloud",
  "url": "https://composio.dev/toolkits/mailercloud",
  "markdown_url": "https://composio.dev/toolkits/mailercloud.md",
  "logo_url": "https://logos.composio.dev/api/mailercloud",
  "categories": [
    "marketing & social media",
    "productivity & project management"
  ],
  "is_composio_managed": false,
  "updated_at": "2026-03-29T06:41:18.215Z"
}
```

![Mailercloud logo](https://logos.composio.dev/api/mailercloud)

## Description

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Mailercloud MCP or direct API to create campaigns, manage subscribers, send newsletters, and analyze performance through natural language.

## Summary

Mailercloud is a modern email marketing platform for businesses of all sizes. It makes campaign management and audience growth fast and simple.

## Categories

- marketing & social media
- productivity & project management

## Toolkit Details

- Tools: 6

## Images

- Logo: https://logos.composio.dev/api/mailercloud

## Authentication

- **Api Key**
  - Type: `api_key`
  - Description: Api Key authentication for Mailercloud.
  - Setup:
    - Configure Api Key credentials for Mailercloud.
    - Use the credentials when creating an auth config in Composio.

## Suggested Prompts

- Send a newsletter to all VIP contacts
- Add a new subscriber to marketing list
- Get open rates for last week's campaign

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `MAILERCLOUD_CREATE_LIST` | Create List | Tool to create a new recipient list in Mailercloud for storing and managing contacts. Use when you need to create a new mailing list for organizing contacts. |
| `MAILERCLOUD_CREATE_PROPERTY` | Create custom property | Create a custom property for contacts in Mailercloud. Custom properties store specific information for contact records. Maximum of 100 properties allowed per account. |
| `MAILERCLOUD_DELETE_PROPERTY` | Delete Contact Property | Tool to delete a custom contact property by ID. Use when removing unused custom fields from contacts. Cannot delete properties used in webforms. |
| `MAILERCLOUD_GET_CLIENT_PLAN` | Get Client Plan | Tool to retrieve client plan information from Mailercloud. Use when you need to check the current subscription status, plan details, or verify API connectivity. |
| `MAILERCLOUD_SEARCH_CONTACTS_IN_LIST` | Search Contacts in List | Tool to retrieve contacts in a specific list with pagination. Use when you need to list or search contacts within a known list ID. |
| `MAILERCLOUD_UPDATE_CONTACT_PROPERTY` | Update Contact Property | Tool to update a custom property of contacts in Mailercloud. Use when you need to modify the name or description of an existing custom property. Note: Editing custom property type using this API is not possible - you can only edit the name and description. |

## Supported Triggers

None listed.

## Installation and MCP Setup

### Path 1: SDK Installation

#### Path 1, Step 1: Install Composio

Install the Composio SDK
```python
pip install composio_openai
```

```typescript
npm install @composio/openai
```

#### Path 1, Step 2: Initialize Composio and Create Tool Router Session

Import and initialize Composio client, then create a Tool Router session
```python
from openai import OpenAI
from composio import Composio
from composio_openai import OpenAIResponsesProvider

composio = Composio(provider=OpenAIResponsesProvider())
openai = OpenAI()
session = composio.create(user_id='your-user-id')
```

```typescript
import OpenAI from 'openai';
import { Composio } from '@composio/core';
import { OpenAIResponsesProvider } from '@composio/openai';

const composio = new Composio({
  provider: new OpenAIResponsesProvider(),
});
const openai = new OpenAI({});
const session = await composio.create('your-user-id');
```

#### Path 1, Step 3: Execute Mailercloud Tools via Tool Router with Your Agent

Get tools from Tool Router session and execute Mailercloud actions with your Agent
```python
tools = session.tools
response = openai.responses.create(
  model='gpt-4.1',
  tools=tools,
  input=[{
    'role': 'user',
    'content': 'Create a new email campaign named "Spring Sale" targeting all contacts in the "Newsletter" group.'
  }]
)
result = composio.provider.handle_tool_calls(
  response=response,
  user_id='your-user-id'
)
print(result)
```

```typescript
const tools = session.tools;
const response = await openai.responses.create({
  model: 'gpt-4.1',
  tools: tools,
  input: [{
    role: 'user',
    content: 'Create a new email campaign named "Spring Sale" targeting all contacts in the "Newsletter" group.'
  }],
});
const result = await composio.provider.handleToolCalls(
  'your-user-id',
  response.output
);
console.log(result);
```

### Path 2: MCP Server Setup

#### Path 2, Step 1: Install Composio

Install the Composio SDK for Python or TypeScript
```python
pip install composio claude-agent-sdk
```

```typescript
npm install @composio/core ai @ai-sdk/openai @ai-sdk/mcp
```

#### Path 2, Step 2: Initialize Client and Create Tool Router Session

Import and initialize the Composio client, then create a Tool Router session for Mailercloud
```python
from composio import Composio
from claude_agent_sdk import ClaudeSDKClient, ClaudeAgentOptions

composio = Composio(api_key='your-composio-api-key')
session = composio.create(user_id='your-user-id')
url = session.mcp.url
```

```typescript
import { Composio } from '@composio/core';

const composio = new Composio({ apiKey: 'your-api-key' });
const session = await composio.create('your-user-id');
console.log(`Tool Router session created: ${session.mcp.url}`);
```

#### Path 2, Step 3: Connect to AI Agent

Use the MCP server with your AI agent (Anthropic Claude or Mastra)
```python
import asyncio

options = ClaudeAgentOptions(
    permission_mode='bypassPermissions',
    mcp_servers={
        'tool_router': {
            'type': 'http',
            'url': url,
            'headers': {
                'x-api-key': 'your-composio-api-key'
            }
        }
    },
    system_prompt='You are a helpful assistant with access to Mailercloud tools.',
    max_turns=10
)

async def main():
    async with ClaudeSDKClient(options=options) as client:
        await client.query('Create a campaign called "Holiday Blast" for all contacts tagged "VIP".')
        async for message in client.receive_response():
            if hasattr(message, 'content'):
                for block in message.content:
                    if hasattr(block, 'text'):
                        print(block.text)

asyncio.run(main())
```

```typescript
import { openai } from '@ai-sdk/openai';
import { experimental_createMCPClient as createMCPClient } from '@ai-sdk/mcp';
import { generateText } from 'ai';

const client = await createMCPClient({
  transport: {
    type: 'http',
    url: session.mcp.url,
    headers: {
      'x-api-key': 'your-composio-api-key',
    },
  },
});

const tools = await client.tools();
const { text } = await generateText({
  model: openai('gpt-4o'),
  tools,
  messages: [{
    role: 'user',
    content: 'Create a campaign called "Holiday Blast" for all contacts tagged "VIP".'
  }],
  maxSteps: 5,
});

console.log(`Agent: ${text}`);
```

## Why Use Composio?

### 1. AI Native Mailercloud Integration

- Supports both Mailercloud MCP and direct API based integrations
- Structured, LLM-friendly schemas for reliable tool execution
- Rich coverage for reading, writing, and querying your Mailercloud data

### 2. Managed Auth

- Built-in OAuth handling with automatic token refresh and rotation
- Central place to manage, scope, and revoke Mailercloud access
- Per user and per environment credentials instead of hard-coded keys

### 3. Agent Optimized Design

- Tools are tuned using real error and success rates to improve reliability over time
- Comprehensive execution logs so you always know what ran, when, and on whose behalf

### 4. Enterprise Grade Security

- Fine-grained RBAC so you control which agents and users can access Mailercloud
- Scoped, least privilege access to Mailercloud resources
- Full audit trail of agent actions to support review and compliance

## Use Mailercloud with any AI Agent Framework

Choose a framework you want to connect Mailercloud with:

- [OpenAI Agents SDK](https://composio.dev/toolkits/mailercloud/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/mailercloud/framework/claude-agents-sdk)
- [Claude Code](https://composio.dev/toolkits/mailercloud/framework/claude-code)
- [Claude Cowork](https://composio.dev/toolkits/mailercloud/framework/claude-cowork)
- [Codex](https://composio.dev/toolkits/mailercloud/framework/codex)
- [OpenClaw](https://composio.dev/toolkits/mailercloud/framework/openclaw)
- [Hermes](https://composio.dev/toolkits/mailercloud/framework/hermes-agent)
- [Google ADK](https://composio.dev/toolkits/mailercloud/framework/google-adk)
- [LangChain](https://composio.dev/toolkits/mailercloud/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/mailercloud/framework/ai-sdk)
- [Mastra AI](https://composio.dev/toolkits/mailercloud/framework/mastra-ai)
- [LlamaIndex](https://composio.dev/toolkits/mailercloud/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/mailercloud/framework/crew-ai)
- [Pydantic AI](https://composio.dev/toolkits/mailercloud/framework/pydantic-ai)
- [AutoGen](https://composio.dev/toolkits/mailercloud/framework/autogen)

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## Frequently Asked Questions

### Do I need my own developer credentials to use Mailercloud with Composio?

Yes, Mailercloud requires you to configure your own API key. Once set up, Composio handles secure credential storage and API request handling for you.

### Can I use multiple toolkits together?

Yes! Composio's Tool Router enables agents to use multiple toolkits. [Learn more](https://docs.composio.dev/tool-router/overview).

### Is Composio secure?

Composio is SOC 2 and ISO 27001 compliant with all data encrypted in transit and at rest. [Learn more](https://trust.composio.dev).

### What if the API changes?

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

---
[See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)