# How to connect Sender to Claude Cowork ```json { "title": "How to connect Sender to Claude Cowork", "toolkit": "Sender", "toolkit_slug": "sender", "framework": "Claude Cowork", "framework_slug": "claude-cowork", "url": "https://composio.dev/toolkits/sender/framework/claude-cowork", "markdown_url": "https://composio.dev/toolkits/sender/framework/claude-cowork.md", "updated_at": "2026-03-29T06:49:27.339Z" } ``` ## 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 Sender account to Cowork via Composio Connect, enabling it to create a new email campaign for holiday sale, add a contact to your main subscriber list, get open rates for last week's campaigns, and more such actions on your behalf without compromising your account security. ## Also integrate Sender with - [OpenAI Agents SDK](https://composio.dev/toolkits/sender/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/sender/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/sender/framework/claude-code) - [Codex](https://composio.dev/toolkits/sender/framework/codex) - [OpenClaw](https://composio.dev/toolkits/sender/framework/openclaw) - [Hermes](https://composio.dev/toolkits/sender/framework/hermes-agent) - [CLI](https://composio.dev/toolkits/sender/framework/cli) - [Google ADK](https://composio.dev/toolkits/sender/framework/google-adk) - [LangChain](https://composio.dev/toolkits/sender/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/sender/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/sender/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/sender/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/sender/framework/crew-ai) ## Connect Sender to Claude Cowork ### Connecting Sender 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 Sender through MCP without you sharing account credentials directly with the agent. ## What is the Sender MCP server, and what's possible with it? The Sender MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Sender account. It provides structured and secure access so your agent can perform Sender operations on your behalf. ## Supported Tools | Tool slug | Name | Description | |---|---|---| | `SENDER_CREATE_FIELD` | Create Field | Tool to create a new custom subscriber field in Sender.net. Use when you need to add custom fields for email personalization, segmentation, or storing additional subscriber information like company name, birthday, job title, or other custom attributes. | | `SENDER_CREATE_OR_UPDATE_SUBSCRIBER` | Create Or Update Subscriber | Tool to create a new subscriber or update an existing one in Sender.net. Use when you need to add new subscribers to your email list or update existing subscriber information. This performs an upsert operation - creates if the email doesn't exist, updates if it does. | | `SENDER_GET_ALL_FIELDS` | Get All Fields | Tool to retrieve a list of all custom subscriber fields configured in the Sender.net account. Use when you need to view available fields for email personalization, segmentation, or managing subscriber data. | | `SENDER_GET_ALL_WORKFLOWS` | Get All Workflows | Tool to retrieve a list of all automation workflows in the Sender account. Use when you need to view or manage automation workflows. | | `SENDER_GET_CAMPAIGN_BY_ID` | Get Campaign By ID | Tool to retrieve a specific campaign by its unique ID from Sender. Use when you need detailed information about a campaign including delivery metrics and engagement statistics. | | `SENDER_GET_GROUP_BY_ID` | Get Group By ID | Tool to retrieve a specific subscriber group by its unique ID from Sender. Use when you need detailed information about a single group including subscriber counts. | | `SENDER_GET_SUBSCRIBER_BY_EMAIL` | Get Subscriber By Email | Tool to retrieve a specific subscriber by their email address from Sender. Use when you need to fetch detailed information about a single subscriber including their status, groups, and custom fields. | | `SENDER_GET_SUBSCRIBER_BY_ID` | Get Subscriber By ID | Tool to retrieve a specific subscriber by their unique ID from Sender. Use when you need to fetch detailed information about a single subscriber including their status, groups, and custom fields. | | `SENDER_UPDATE_SUBSCRIBER_FIELDS` | Update Subscriber Fields | Tool to update custom fields and information for an existing subscriber in Sender.net. Use when you need to modify subscriber details such as email, first name, last name, groups, or custom fields for email personalization and segmentation. | ## Supported Triggers None listed. ## Creating MCP Server - Stand-alone vs Composio SDK The Sender MCP server connects Claude Cowork to your Sender account through Composio. Once connected, Cowork can use the available Sender tools and triggers to complete tasks on your behalf. ## Complete Code None listed. ## How to build Sender MCP Agent with another framework - [OpenAI Agents SDK](https://composio.dev/toolkits/sender/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/sender/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/sender/framework/claude-code) - [Codex](https://composio.dev/toolkits/sender/framework/codex) - [OpenClaw](https://composio.dev/toolkits/sender/framework/openclaw) - [Hermes](https://composio.dev/toolkits/sender/framework/hermes-agent) - [CLI](https://composio.dev/toolkits/sender/framework/cli) - [Google ADK](https://composio.dev/toolkits/sender/framework/google-adk) - [LangChain](https://composio.dev/toolkits/sender/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/sender/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/sender/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/sender/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/sender/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 Sender MCP? With a standalone Sender MCP server, the agents and LLMs can only access a fixed set of Sender tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Sender 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 Sender tools. ### Can I manage the permissions and scopes for Sender while using Tool Router? Yes, absolutely. You can configure which Sender 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 Sender data and credentials are handled as safely as possible. --- [See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)