# How to connect Mailercloud to Claude Cowork ```json { "title": "How to connect Mailercloud to Claude Cowork", "toolkit": "Mailercloud", "toolkit_slug": "mailercloud", "framework": "Claude Cowork", "framework_slug": "claude-cowork", "url": "https://composio.dev/toolkits/mailercloud/framework/claude-cowork", "markdown_url": "https://composio.dev/toolkits/mailercloud/framework/claude-cowork.md", "updated_at": "2026-03-29T06:41:18.215Z" } ``` ## Introduction Cowork is Anthropic's AI agent for knowledge work. Think of it as Claude Code for everything else. It works autonomously with your computer, local files, and applications to accomplish complex tasks. This guide walks you through the easiest and most secure way to connect your Mailercloud account to Cowork via Composio Connect, enabling it to send a newsletter to all VIP contacts, add a new subscriber to marketing list, get open rates for last week's campaign, and more such actions on your behalf without compromising your account security. ## 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) - [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) - [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) ## Connect Mailercloud to Claude Cowork ### Connecting Mailercloud to Claude Cowork 1. Open Customize In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top. 2. Add the Composio MCP server Click Add custom connector and paste in the Composio MCP server URL: ```bash https://connect.composio.dev/mcp ``` ## What is Claude Cowork? Claude Cowork is Anthropic's agent for general knowledge work. It can use your computer, files, and connected applications to complete longer-running tasks across your work tools. With Composio Connect, Cowork can securely access apps like Mailercloud through MCP without you sharing account credentials directly with the agent. ## 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 connects Claude Cowork to your Mailercloud account through Composio. Once connected, Cowork can use the available Mailercloud tools and triggers to complete tasks on your behalf. ## Complete Code None listed. ## 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) - [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) - [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 Claude Cowork? Yes, you can. Claude Cowork 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. --- [See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)