# Mailbluster

```json
{
  "name": "Mailbluster",
  "slug": "mailbluster",
  "url": "https://composio.dev/toolkits/mailbluster",
  "markdown_url": "https://composio.dev/toolkits/mailbluster.md",
  "logo_url": "https://logos.composio.dev/api/mailbluster",
  "categories": [
    "marketing & social media"
  ],
  "is_composio_managed": false,
  "updated_at": "2026-05-12T10:18:05.428Z"
}
```

![Mailbluster logo](https://logos.composio.dev/api/mailbluster)

## Description

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Mailbluster MCP or direct API to send campaigns, manage subscribers, segment lists, and track email performance through natural language.

## Summary

MailBluster is a robust, cost-effective email marketing platform for sending personalized campaigns at scale. It helps businesses engage audiences with reliable delivery and advanced segmentation.

## Categories

- marketing & social media

## Toolkit Details

- Tools: 15

## Images

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

## Authentication

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

## Suggested Prompts

- Add new lead with email and name
- List all products in my catalog
- Get details for recent order by ID
- Remove product from Mailbluster inventory

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `MAILBLUSTER_CREATE_LEAD` | Create MailBluster Lead | Tool to create a new lead in MailBluster. Use after gathering the lead's email and optional data. |
| `MAILBLUSTER_CREATE_ORDER` | Create Order | Tool to create a new order in MailBluster. |
| `MAILBLUSTER_CREATE_PRODUCT` | Create Product | Tool to create a new product in MailBluster. Use when you have all product details ready to add it to your MailBluster catalog. Requires a unique product ID and name. |
| `MAILBLUSTER_DELETE_LEAD` | Delete MailBluster Lead | Tool to delete a lead by lead email hash. Use after confirming the lead hash (MD5 encrypted email address). |
| `MAILBLUSTER_DELETE_ORDER` | Delete Order | Tool to delete a specific order. Use after confirming the order ID to remove an order from Mailbluster. |
| `MAILBLUSTER_DELETE_PRODUCT` | Delete Mailbluster Product | Tool to delete a product. Use after confirming product existence. |
| `MAILBLUSTER_GET_LEAD` | Get Lead | Tool to retrieve a specific lead's information using their lead hash (MD5 encrypted email address). Use when you need to fetch lead details by their email hash. |
| `MAILBLUSTER_GET_ORDER` | Get Order | Tool to retrieve details of a specific order. Use when you have the order's ID. |
| `MAILBLUSTER_GET_PRODUCT` | Get Product | Tool to retrieve details of a specific product. Use when you have a valid product ID and need full product information. |
| `MAILBLUSTER_LIST_FIELDS` | List Fields | Tool to list all custom fields. Use when you need to retrieve all defined custom fields after authenticating with MailBluster. |
| `MAILBLUSTER_LIST_ORDERS` | List Orders | Tool to list all orders. Use when you need to retrieve orders with optional pagination, sorting, or searching after authenticating with Mailbluster. |
| `MAILBLUSTER_LIST_PRODUCTS` | List Products | Tool to list all products. Use when you need to retrieve products with optional pagination, sorting, or filtering. |
| `MAILBLUSTER_UPDATE_LEAD` | Update MailBluster Lead | Tool to update an existing lead's information in MailBluster. Use when you need to modify lead details, subscription status, or manage tags. |
| `MAILBLUSTER_UPDATE_ORDER` | Update Order | Tool to update an existing order's customer details, currency, price, and items in MailBluster. Use when you need to modify an order. |
| `MAILBLUSTER_UPDATE_PRODUCT` | MailBluster Update Product | Tool to update a product in MailBluster by its ID. Use after confirming the product ID to modify attributes. |

## 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 Mailbluster Tools via Tool Router with Your Agent

Get tools from Tool Router session and execute Mailbluster actions with your Agent
```python
tools = session.tools
response = openai.responses.create(
  model='gpt-4.1',
  tools=tools,
  input=[{
    'role': 'user',
    'content': 'Add a new lead with email and name'
  }]
)
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: 'Add a new lead with email and name'
  }],
});
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 and Claude Agent SDK
```python
pip install composio claude-agent-sdk
```

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

#### Path 2, Step 2: Create Tool Router Session

Initialize the Composio client and create a Tool Router session
```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' });

console.log("Creating Tool Router session...");
const { mcp } = await composio.create('your-user-id');
console.log(`Tool Router session created: ${mcp.url}`);
```

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

Use the MCP server with your AI agent
```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 Mailbluster tools.',
    max_turns=10
)

async def main():
    async with ClaudeSDKClient(options=options) as client:
        await client.query('Create a new lead with email john.doe@example.com and first name John')
        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, stepCountIs } from 'ai';

const client = await createMCPClient({
  transport: {
    type: 'http',
    url: 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 new lead with email john.doe@example.com and first name John' }],
  stopWhen: stepCountIs( 5 )
});

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

## Why Use Composio?

### 1. AI Native Mailbluster Integration

- Supports both Mailbluster MCP and direct API based integrations
- Structured, LLM-friendly schemas for reliable tool execution
- Rich coverage for sending campaigns, managing lists, and tracking results

### 2. Managed Auth

- Built-in API key handling with secure storage and rotation
- Central place to manage, scope, and revoke Mailbluster 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 Mailbluster
- Scoped, least privilege access to Mailbluster resources
- Full audit trail of agent actions to support review and compliance

## Use Mailbluster with any AI Agent Framework

Choose a framework you want to connect Mailbluster with:

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

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- [Cardly](https://composio.dev/toolkits/cardly) - Cardly is a platform for creating and sending personalized direct mail to customers. It helps businesses break through the digital clutter by getting real engagement via physical mailboxes.
- [ClickSend](https://composio.dev/toolkits/clicksend) - ClickSend is a cloud-based SMS and email marketing platform for businesses. It streamlines communication by enabling quick message delivery and contact management.
- [Crustdata](https://composio.dev/toolkits/crustdata) - CrustData is an AI-powered data intelligence platform for real-time company and people data. It helps B2B sales teams, AI SDRs, and investors react to live business signals.
- [Curated](https://composio.dev/toolkits/curated) - Curated is a platform for collecting, curating, and publishing newsletters. It streamlines content aggregation and distribution for creators and teams.
- [Customerio](https://composio.dev/toolkits/customerio) - Customer.io is a customer engagement platform for targeted messaging across email, SMS, and push. Easily automate, segment, and track communications with your audience.
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## Frequently Asked Questions

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

Yes, Mailbluster requires you to configure your own API key credentials. 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)