# How to connect Mailsoftly to Claude Cowork ```json { "title": "How to connect Mailsoftly to Claude Cowork", "toolkit": "Mailsoftly", "toolkit_slug": "mailsoftly", "framework": "Claude Cowork", "framework_slug": "claude-cowork", "url": "https://composio.dev/toolkits/mailsoftly/framework/claude-cowork", "markdown_url": "https://composio.dev/toolkits/mailsoftly/framework/claude-cowork.md", "updated_at": "2026-05-12T10:18:23.464Z" } ``` ## 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 Mailsoftly account to Cowork via Composio Connect, enabling it to verify if your Mailsoftly API key is valid, check our company profile details on Mailsoftly, confirm Mailsoftly account credentials before sending campaign, and more such actions on your behalf without compromising your account security. ## Also integrate Mailsoftly with - [OpenAI Agents SDK](https://composio.dev/toolkits/mailsoftly/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/mailsoftly/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/mailsoftly/framework/claude-code) - [Codex](https://composio.dev/toolkits/mailsoftly/framework/codex) - [OpenClaw](https://composio.dev/toolkits/mailsoftly/framework/openclaw) - [Hermes](https://composio.dev/toolkits/mailsoftly/framework/hermes-agent) - [CLI](https://composio.dev/toolkits/mailsoftly/framework/cli) - [Google ADK](https://composio.dev/toolkits/mailsoftly/framework/google-adk) - [LangChain](https://composio.dev/toolkits/mailsoftly/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/mailsoftly/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/mailsoftly/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/mailsoftly/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/mailsoftly/framework/crew-ai) ## Connect Mailsoftly to Claude Cowork ### Connecting Mailsoftly 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 Mailsoftly through MCP without you sharing account credentials directly with the agent. ## What is the Mailsoftly MCP server, and what's possible with it? The Mailsoftly MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Mailsoftly account. It provides structured and secure access to your email marketing platform, so your agent can validate credentials, access firm information, and streamline campaign setup for you. - API key authentication validation: Have your agent confirm your API key is working and securely connected before taking further actions. - Retrieve firm details: Instantly pull details about your Mailsoftly organization to verify account information or tailor campaign strategies. - Credential troubleshooting automation: Let your agent proactively diagnose and report authentication issues, making onboarding and integration smoother. - Foundational checks for workflow automation: Use the agent to verify Mailsoftly connection status as the first step in building automated campaign flows. ## Supported Tools | Tool slug | Name | Description | |---|---|---| | `MAILSOFTLY_ADD_CONTACT_TO_CONTACT_LIST` | Add Contact to Contact List | Tool to add an existing contact to a specific contact list. Use when you need to add a contact to a contact list in Mailsoftly. | | `MAILSOFTLY_ADD_CUSTOM_FIELD_TO_CONTACT` | Add Custom Field to Contact | Tool to add a custom field value to an existing contact. Use when you need to store additional custom data on a contact record. | | `MAILSOFTLY_ASSIGN_TAGS_TO_CONTACT` | Assign Tags to Contact | Tool to assign multiple tags to an existing contact at once. Skips tags if they are already assigned to the contact. Use when you need to categorize or label a contact with one or more tags in Mailsoftly. | | `MAILSOFTLY_AUTHENTICATE_FIRM` | Authenticate Firm | Tool to validate the API key and retrieve firm details. Use when confirming credentials before making other Mailsoftly API calls. | | `MAILSOFTLY_CREATE_CONTACT` | Create Contact | Tool to create a new contact for the authenticated firm with email, first name, and last name. Use when adding new contacts to the firm's contact list. | | `MAILSOFTLY_CREATE_CONTACT_LIST` | Create Contact List | Tool to create a new contact list for the authenticated firm. Use when organizing contacts into separate lists for targeted campaigns. | | `MAILSOFTLY_CREATE_EMAILS` | Create Email Drafts | Tool to create one or more email drafts in Mailsoftly. Use when drafting emails for campaigns or communications. If contact_list_id is not provided, the system automatically creates a contact list from the provided recipients. | | `MAILSOFTLY_CREATE_OR_UPDATE_CONTACT` | Create or Update Contact | Tool to create a new contact or update an existing contact in Mailsoftly. Use when you need to add a new contact to the system or update an existing contact's information. If contact_id is provided, the existing contact will be updated; otherwise, a new contact will be created. | | `MAILSOFTLY_GET_CONTACT` | Get Contact | Tool to retrieve a specific contact by ID from Mailsoftly. Use when you need to fetch details about a specific contact. You can choose between basic or detailed view using the type parameter. | | `MAILSOFTLY_GET_CONTACT_FIELDS` | Get Contact Fields | Tool to fetch all contact fields available for a firm, excluding hidden columns. Use when you need to retrieve the list of available contact field names and their data types. | | `MAILSOFTLY_GET_CONTACT_LIST` | Get Contact List | Tool to retrieve details of a specific contact list by ID. Use when you need to fetch information about a contact list including its name and contact count. | | `MAILSOFTLY_GET_CONTACT_LIST_CONTACTS` | Get Contact List Contacts | Tool to retrieve all contacts within a specific contact list. Use when you need to fetch the members of a particular contact list. | | `MAILSOFTLY_GET_CONTACT_LISTS` | Get Contact Lists | Tool to retrieve all contact lists for the authenticated firm. Use when you need to view all available contact lists and their details. | | `MAILSOFTLY_GET_CONTACTS` | Get Contacts | Tool to retrieve all contacts associated with a firm. Use when you need to fetch the complete list of contacts from Mailsoftly. | | `MAILSOFTLY_GET_CUSTOM_FIELDS` | Get Custom Fields | Tool to retrieve all custom fields defined for the authenticated firm. Use when you need to understand what custom field options are available for contacts in Mailsoftly. | | `MAILSOFTLY_GET_EMAIL_STATUS` | Get Email Status | Tool to fetch the status of a specific email draft by its ID. Use when checking if a draft is ready to send or to get its current status. | | `MAILSOFTLY_GET_TAGS` | Get Tags | Tool to retrieve all tags associated with the authenticated firm. Use when you need to list available tags for organizing contacts or campaigns. | | `MAILSOFTLY_SEARCH_CONTACTS` | Search Contacts | Tool to search for contacts matching specified criteria in Mailsoftly. Use when you need to find contacts by email, first name, or last name. At least one search parameter should be provided for meaningful results. | | `MAILSOFTLY_SEND_EMAIL` | Send Email | Tool to send an existing email draft that is marked as ready. Use when you need to send a prepared email draft via Mailsoftly. | | `MAILSOFTLY_UPDATE_CONTACT` | Update Contact | Tool to update an existing contact's information in Mailsoftly. Use when you need to modify contact details such as name or email address. | ## Supported Triggers None listed. ## Creating MCP Server - Stand-alone vs Composio SDK The Mailsoftly MCP server connects Claude Cowork to your Mailsoftly account through Composio. Once connected, Cowork can use the available Mailsoftly tools and triggers to complete tasks on your behalf. ## Complete Code None listed. ## How to build Mailsoftly MCP Agent with another framework - [OpenAI Agents SDK](https://composio.dev/toolkits/mailsoftly/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/mailsoftly/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/mailsoftly/framework/claude-code) - [Codex](https://composio.dev/toolkits/mailsoftly/framework/codex) - [OpenClaw](https://composio.dev/toolkits/mailsoftly/framework/openclaw) - [Hermes](https://composio.dev/toolkits/mailsoftly/framework/hermes-agent) - [CLI](https://composio.dev/toolkits/mailsoftly/framework/cli) - [Google ADK](https://composio.dev/toolkits/mailsoftly/framework/google-adk) - [LangChain](https://composio.dev/toolkits/mailsoftly/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/mailsoftly/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/mailsoftly/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/mailsoftly/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/mailsoftly/framework/crew-ai) ## Related Toolkits - [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. - [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. - [Beamer](https://composio.dev/toolkits/beamer) - Beamer is a news and changelog platform for in-app announcements and feature updates. It helps companies boost user engagement by sharing news where users are most active. - [Benchmark email](https://composio.dev/toolkits/benchmark_email) - Benchmark Email is a platform for creating, sending, and tracking email campaigns. It's built to help you engage audiences and analyze results—all in one place. - [Bigmailer](https://composio.dev/toolkits/bigmailer) - BigMailer is an email marketing platform for managing multiple brands with white-labeling and automation. It helps teams streamline campaigns and simplify integration with Amazon SES. - [Brandfetch](https://composio.dev/toolkits/brandfetch) - Brandfetch is an API that delivers company logos, colors, and visual branding assets. It helps marketers and developers keep brand visuals consistent everywhere. - [Brevo](https://composio.dev/toolkits/brevo) - Brevo is an all-in-one email and SMS marketing platform for transactional messaging, automation, and CRM. It helps businesses engage customers and streamline communications through powerful campaign tools. - [Campayn](https://composio.dev/toolkits/campayn) - Campayn is an email marketing platform for creating, sending, and managing campaigns. It helps businesses engage contacts and grow audiences with easy-to-use tools. - [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. - [Cutt ly](https://composio.dev/toolkits/cutt_ly) - Cutt.ly is a URL shortening service for managing and analyzing links. Streamline your workflows with quick, trackable, and branded short URLs. - [Demio](https://composio.dev/toolkits/demio) - Demio is webinar software built for marketers, offering both live and automated sessions with interactive features. It helps teams engage audiences and optimize lead generation through detailed analytics. ## Frequently Asked Questions ### What are the differences in Tool Router MCP and Mailsoftly MCP? With a standalone Mailsoftly MCP server, the agents and LLMs can only access a fixed set of Mailsoftly tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Mailsoftly 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 Mailsoftly tools. ### Can I manage the permissions and scopes for Mailsoftly while using Tool Router? Yes, absolutely. You can configure which Mailsoftly 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 Mailsoftly data and credentials are handled as safely as possible. --- [See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)