# How to integrate Mailercloud MCP with Codex

```json
{
  "title": "How to integrate Mailercloud MCP with Codex",
  "toolkit": "Mailercloud",
  "toolkit_slug": "mailercloud",
  "framework": "Codex",
  "framework_slug": "codex",
  "url": "https://composio.dev/toolkits/mailercloud/framework/codex",
  "markdown_url": "https://composio.dev/toolkits/mailercloud/framework/codex.md",
  "updated_at": "2026-03-29T06:41:18.215Z"
}
```

## Introduction

Codex is one of the most popular coding harnesses out there. And MCP makes the experience even better. With Mailercloud MCP integration, you can draft, triage, summarise emails, and much more, all without leaving the terminal or the app, whichever you prefer.

## Also integrate 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)
- [OpenClaw](https://composio.dev/toolkits/mailercloud/framework/openclaw)
- [Hermes](https://composio.dev/toolkits/mailercloud/framework/hermes-agent)
- [CLI](https://composio.dev/toolkits/mailercloud/framework/cli)
- [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)

## TL;DR

### Why use Composio?
Apart from a managed and hosted MCP server, you will get:
- CodeAct: A dedicated workbench that allows GPT to write its code to handle complex tool chaining. Reduces to-and-fro with LLMs for frequent tool calling.
- Large tool responses: Handle them to minimise context rot.
- Dynamic just-in-time access to 20,000 tools across 1000+ other Apps for cross-app workflows. It loads the tools you need, so GPTs aren't overwhelmed by tools you don't need.

## Connect Mailercloud to Codex

### How to install Mailercloud MCP in Codex
### Run the setup command
Run this command in your terminal to add the Composio MCP server to Codex.

```bash
codex mcp add composio --url https://connect.composio.dev/mcp
```

## What is the Mailercloud MCP server, and what's possible with it?

The Mailercloud MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Mailercloud account. It provides structured and secure access so your agent can perform Mailercloud operations on your behalf.

## 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.

## Creating MCP Server - Stand-alone vs Composio SDK

The Mailercloud MCP server provides comprehensive access to Mailercloud operations through Composio. Once connected, you can perform all major Mailercloud actions directly from Codex using natural language commands.

## Complete Code

None listed.

## Conclusion

### Conclusion
You've successfully integrated Mailercloud with Codex using Composio's MCP server. Now you can interact with Mailercloud directly from your terminal, VS Code, or the Codex App using natural language commands.
Key benefits of this setup:
- Seamless integration across CLI, VS Code, and standalone app
- Natural language commands for Mailercloud operations
- Managed authentication through Composio
- Access to 20,000+ tools across 1000+ apps for cross-app workflows
- CodeAct workbench for complex tool chaining
Next steps:
- Try asking Codex to perform various Mailercloud operations
- Explore cross-app workflows by connecting more toolkits
- Build automation scripts that leverage Codex's AI capabilities

## How to build Mailercloud MCP Agent with another framework

- [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)
- [OpenClaw](https://composio.dev/toolkits/mailercloud/framework/openclaw)
- [Hermes](https://composio.dev/toolkits/mailercloud/framework/hermes-agent)
- [CLI](https://composio.dev/toolkits/mailercloud/framework/cli)
- [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)

## Related Toolkits

- [Google Sheets](https://composio.dev/toolkits/googlesheets) - Google Sheets is a cloud-based spreadsheet tool for real-time collaboration and data analysis. It lets teams work together from anywhere, updating information instantly.
- [Notion](https://composio.dev/toolkits/notion) - Notion is a collaborative workspace for notes, docs, wikis, and tasks. It streamlines team knowledge, project tracking, and workflow customization in one place.
- [Airtable](https://composio.dev/toolkits/airtable) - Airtable combines the flexibility of spreadsheets with the power of a database for easy project and data management. Teams use Airtable to organize, track, and collaborate with custom views and automations.
- [Asana](https://composio.dev/toolkits/asana) - Asana is a collaborative work management platform for teams to organize and track projects. It streamlines teamwork, boosts productivity, and keeps everyone aligned on goals.
- [Google Tasks](https://composio.dev/toolkits/googletasks) - Google Tasks is a to-do list and task management tool integrated into Gmail and Google Calendar. It helps you organize, track, and complete tasks across your Google ecosystem.
- [Linear](https://composio.dev/toolkits/linear) - Linear is a modern issue tracking and project planning tool for fast-moving teams. It helps streamline workflows, organize projects, and boost productivity.
- [Jira](https://composio.dev/toolkits/jira) - Jira is Atlassian’s platform for bug tracking, issue tracking, and agile project management. It helps teams organize work, prioritize tasks, and deliver projects efficiently.
- [Clickup](https://composio.dev/toolkits/clickup) - ClickUp is an all-in-one productivity platform for managing tasks, docs, goals, and team collaboration. It streamlines project workflows so teams can work smarter and stay organized in one place.
- [Monday](https://composio.dev/toolkits/monday) - Monday.com is a customizable work management platform for project planning and collaboration. It helps teams organize tasks, automate workflows, and track progress in real time.
- [Reddit](https://composio.dev/toolkits/reddit) - Reddit is a social news platform with thriving user-driven communities (subreddits). It's the go-to place for discussion, content sharing, and viral marketing.
- [Facebook](https://composio.dev/toolkits/facebook) - Facebook is a social media and advertising platform for businesses and creators. It helps you connect, share, and manage content across your public Facebook Pages.
- [Linkedin](https://composio.dev/toolkits/linkedin) - LinkedIn is a professional networking platform for connecting, sharing content, and engaging with business opportunities. It's the go-to place for building your professional brand and unlocking new career connections.
- [Active campaign](https://composio.dev/toolkits/active_campaign) - ActiveCampaign is a marketing automation and CRM platform for managing email campaigns, sales pipelines, and customer segmentation. It helps businesses engage customers and drive growth through smart automation and targeted outreach.
- [ActiveTrail](https://composio.dev/toolkits/active_trail) - ActiveTrail is a user-friendly email marketing and automation platform. It helps you reach subscribers and automate campaigns with ease.
- [Addressfinder](https://composio.dev/toolkits/addressfinder) - Addressfinder is a data quality platform for verifying addresses, emails, and phone numbers. It helps you ensure accurate customer and contact data every time.
- [Agiled](https://composio.dev/toolkits/agiled) - Agiled is an all-in-one business management platform for CRM, projects, and finance. It helps you streamline workflows, consolidate client data, and manage business processes in one place.
- [Ahrefs](https://composio.dev/toolkits/ahrefs) - Ahrefs is an SEO and marketing platform for site audits, keyword research, and competitor insights. It helps you improve search rankings and drive organic traffic.
- [Amcards](https://composio.dev/toolkits/amcards) - AMCards lets you create and mail personalized greeting cards online. Build stronger customer relationships with easy, automated card campaigns.
- [Ascora](https://composio.dev/toolkits/ascora) - Ascora is a cloud-based field service management platform for service businesses. It streamlines scheduling, invoicing, and customer operations in one place.
- [Basecamp](https://composio.dev/toolkits/basecamp) - Basecamp is a project management and team collaboration tool by 37signals. It helps teams organize tasks, share files, and communicate efficiently in one place.

## Frequently Asked Questions

### What are the differences in Tool Router MCP and Mailercloud MCP?

With a standalone Mailercloud MCP server, the agents and LLMs can only access a fixed set of Mailercloud tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Mailercloud and many other apps based on the task at hand, all through a single MCP endpoint.

### Can I use Tool Router MCP with Codex?

Yes, you can. Codex fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Mailercloud tools.

### Can I manage the permissions and scopes for Mailercloud while using Tool Router?

Yes, absolutely. You can configure which Mailercloud scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

### How safe is my data with Composio Tool Router?

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Mailercloud data and credentials are handled as safely as possible.

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