# How to integrate Mailsoftly MCP with Atomic Agent ```json { "title": "How to integrate Mailsoftly MCP with Atomic Agent", "toolkit": "Mailsoftly", "toolkit_slug": "mailsoftly", "framework": "Atomic Agent", "framework_slug": "atomic-agent", "url": "https://composio.dev/toolkits/mailsoftly/framework/atomic-agent", "markdown_url": "https://composio.dev/toolkits/mailsoftly/framework/atomic-agent.md", "updated_at": "2026-08-11T13:12:01.794Z" } ``` ## Introduction Atomic Agent is an open-source AI agent that runs on your machine and supports local models through llama.cpp. Connect it to 1,500+ apps through Composio, including Mailsoftly. This guide uses Atomic Agent's built-in Composio integration. You need Atomic Agent v0.5.6 or later, your own Composio API key, and a Mailsoftly account. See the [Atomic Agent documentation](https://atomicagent.io/docs/?cta_placement=atomic-agent-docs) for installation instructions. ## 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) - [Claude Cowork](https://composio.dev/toolkits/mailsoftly/framework/claude-cowork) - [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) - [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) - [Pydantic AI](https://composio.dev/toolkits/mailsoftly/framework/pydantic-ai) - [AutoGen](https://composio.dev/toolkits/mailsoftly/framework/autogen) ## TL;DR ### How Atomic Agent connects to Mailsoftly Atomic Agent connects to Composio's Tool Router over Streamable HTTP MCP. It discovers the tools needed for your request, and Composio handles account authentication. Execution and account-connection tools follow Atomic Agent's configured approval policy. Review any approval prompt before allowing an action on your connected account. ## Connect Mailsoftly to Atomic Agent ### Connect Mailsoftly to Atomic Agent - Sign up or sign in to the [Composio dashboard](https://dashboard.composio.dev/?cta_placement=atomic-agent-api-key). Copy your API key. - In Atomic Agent, open the Integrations tab and select Composio. Select API key, press e, paste the key, and press Enter. The tools become available immediately, without a restart. - Ask Atomic Agent to do something in Mailsoftly. It searches Composio for the right tool. - On first use, open the sign-in link returned in the chat. Connect your Mailsoftly account, then return to Atomic Agent to continue. ### Headless setup Add the following line to ~/.atomic-agent/.env, replacing YOUR_COMPOSIO_API_KEY with your key. Start Atomic Agent after saving the file. ```bash COMPOSIO_API_KEY=YOUR_COMPOSIO_API_KEY ``` ## 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. ## Troubleshooting ### Why is my API key rejected? Copy the key directly from the Composio dashboard. Atomic Agent requires ASCII characters because it sends the key in an HTTP header. Remove any extra characters introduced when copying. ### Why are Composio tools unavailable after saving a key? Check that you use Atomic Agent v0.5.6 or later and that Composio is enabled in your configuration. A "composio": { "enabled": false } setting disables the integration while keeping the saved key on disk. ### Does Composio have a free plan? The Hobby plan includes 100,000 tool calls per month. Composio-managed OAuth apps have a lower included allowance. See [Composio pricing](/pricing) for the current limits that apply to your connection. ## Complete Code None listed. ## Conclusion ### Use Mailsoftly from Atomic Agent With your account connected, ask Atomic Agent to work with Mailsoftly in natural language. You can connect more apps through the same Composio integration as you need them. Visit the [Atomic Agent website](https://atomicagent.io/?cta_placement=atomic-agent-site) or inspect the [Atomic Agent source code](https://github.com/AtomicBot-ai/atomic-agent?cta_placement=atomic-agent-repo). ## 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) - [Claude Cowork](https://composio.dev/toolkits/mailsoftly/framework/claude-cowork) - [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) - [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) - [Pydantic AI](https://composio.dev/toolkits/mailsoftly/framework/pydantic-ai) - [AutoGen](https://composio.dev/toolkits/mailsoftly/framework/autogen) ## 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. - [Adobe Marketing Agent MCP](https://composio.dev/toolkits/adobe_marketing_agent_mcp) - Adobe Marketing Agent MCP is Adobe's hosted MCP service that exposes marketing context, preferences, and agent capabilities. Use it to provide agents with campaign, audience, and analytics context via a managed integration. - [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. - [AimTell](https://composio.dev/toolkits/aimtell) - AimTell is a web push notification platform for managing websites, subscribers, campaigns, segments, and delivery analytics. Use it to send targeted browser notifications and measure engagement across your web push campaigns. - [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. - [Beehiiv](https://composio.dev/toolkits/beehiiv) - Beehiiv is a newsletter platform for creating and managing publications and subscribers. It helps grow audience engagement and monetize your mailing list. - [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. - [Bitly](https://composio.dev/toolkits/bitly) - Bitly is a link management platform for shortening, customizing, sharing, and tracking links and QR codes. It helps teams create branded links and measure engagement across campaigns. - [BlueFox Email](https://composio.dev/toolkits/bluefox_email) - BlueFox Email is an email API for managing contacts, subscriber lists, and sending transactional and triggered messages. Use it to reliably send transactional and triggered emails and manage subscribers at scale. - [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. - [Braze](https://composio.dev/toolkits/braze) - Braze is a customer engagement platform for managing user data, messaging, campaigns, and analytics. Use it to deliver targeted, multi-channel messaging and analyze campaign performance. - [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. - [Buffer](https://composio.dev/toolkits/buffer) - Buffer is a social media management platform for planning, creating, scheduling, and publishing posts across connected channels. It helps teams keep content organized and publish consistently without jumping between social apps. - [BulkPublish](https://composio.dev/toolkits/bulkpublish) - BulkPublish is a social media publishing platform for managing scheduled content across multiple channels. It helps teams plan campaigns, publish consistently, and track performance in one place. ## 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 Atomic Agent? Yes, you can. Atomic Agent 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)