# How to integrate Sendfox MCP with Atomic Agent ```json { "title": "How to integrate Sendfox MCP with Atomic Agent", "toolkit": "Sendfox", "toolkit_slug": "sendfox", "framework": "Atomic Agent", "framework_slug": "atomic-agent", "url": "https://composio.dev/toolkits/sendfox/framework/atomic-agent", "markdown_url": "https://composio.dev/toolkits/sendfox/framework/atomic-agent.md", "updated_at": "2026-08-11T13:14:29.515Z" } ``` ## 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 Sendfox. 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 Sendfox account. See the [Atomic Agent documentation](https://atomicagent.io/docs/?cta_placement=atomic-agent-docs) for installation instructions. ## Also integrate Sendfox with - [OpenAI Agents SDK](https://composio.dev/toolkits/sendfox/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/sendfox/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/sendfox/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/sendfox/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/sendfox/framework/codex) - [OpenClaw](https://composio.dev/toolkits/sendfox/framework/openclaw) - [Hermes](https://composio.dev/toolkits/sendfox/framework/hermes-agent) - [Google ADK](https://composio.dev/toolkits/sendfox/framework/google-adk) - [LangChain](https://composio.dev/toolkits/sendfox/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/sendfox/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/sendfox/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/sendfox/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/sendfox/framework/crew-ai) - [Pydantic AI](https://composio.dev/toolkits/sendfox/framework/pydantic-ai) - [AutoGen](https://composio.dev/toolkits/sendfox/framework/autogen) ## TL;DR ### How Atomic Agent connects to Sendfox 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 Sendfox to Atomic Agent ### Connect Sendfox 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 Sendfox. It searches Composio for the right tool. - On first use, open the sign-in link returned in the chat. Connect your Sendfox 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 Sendfox MCP server, and what's possible with it? The Sendfox MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Sendfox account. It provides structured and secure access to your contact lists, campaigns, automations, and more, so your agent can fetch contacts, manage lists, retrieve campaign data, and automate subscriber actions on your behalf. - Contact management and lookup: Instantly retrieve contact details by email or ID, fetch all contacts, or discover specific fields to personalize your outreach. - List organization and updates: Ask your agent to fetch all your Sendfox lists, get details for a specific list, or remove contacts from lists as needed. - Campaign and automation insights: Effortlessly retrieve paginated lists of campaigns or automations, so you can stay on top of your email marketing performance. - Subscription and unsubscribe actions: Let your agent globally unsubscribe a contact or handle opt-outs automatically for better list hygiene. - Discover contact field metadata: Pull all available contact fields to help with dynamic contact creation or targeted updates. ## Supported Tools | Tool slug | Name | Description | |---|---|---| | `SENDFOX_DELETE_CONTACT_FROM_LIST` | Delete Contact from List | Tool to remove a contact from a specific list in SendFox. Use when you need to disassociate a contact from a list without deleting the contact entirely. The contact will remain in your account but will no longer be a member of the specified list. | | `SENDFOX_GET_AUTOMATIONS` | Get Automations | Tool to retrieve a list of automations. Use when you need to list all automations for your SendFox account. | | `SENDFOX_GET_CAMPAIGN_BY_ID` | Get Campaign by ID | Retrieve details for a specific campaign by its ID from SendFox. Use this when you need to fetch information about a particular campaign. Returns campaign details including title, subject, HTML content, sender info, and scheduling details. | | `SENDFOX_GET_CAMPAIGNS` | Get Campaigns | Retrieve a paginated list of email campaigns from SendFox. Use this to fetch all campaigns or navigate through pages of results. Returns campaign details including status, subject, content, and timestamps. | | `SENDFOX_GET_CONTACT_BY_ID` | Get Contact by ID | Retrieves a contact's details by their unique ID from SendFox. Use this tool when you need to look up a specific contact's information after obtaining their ID from a contact list or other API response. Returns contact details including email, name, subscription status, and list memberships. | | `SENDFOX_GET_CONTACT_FIELDS` | Get Contact Fields | Retrieves all contact fields available in the SendFox account. Use this to discover available fields before creating or updating contacts. Returns standard fields (email, first_name, last_name) and any custom fields configured in the account. | | `SENDFOX_GET_CONTACTS` | Get Contacts | Tool to retrieve a paginated list of contacts. Use when you need to fetch contacts in pages, optionally filtering by email. | | `SENDFOX_GET_CONTACTS_IN_LIST` | Get Contacts in List | Tool to retrieve contacts in a specific list. Use when you need to fetch all contacts belonging to a particular list, optionally filtering by search query. | | `SENDFOX_GET_CURRENT_USER` | Get Current User | Tool to retrieve information about the authenticated user from SendFox. Returns user details including name, email, contact count, and contact limit. Use this tool when you need to check account information or verify authentication status. | | `SENDFOX_GET_FORMS` | Get Forms | Tool to retrieve a paginated list of forms from SendFox. Use when you need to fetch all forms or search for specific forms by query. | | `SENDFOX_GET_LIST_BY_ID` | Get List by ID | Retrieves details of a specific contact list by its ID from SendFox. Use this tool when you need information about a particular list (name, contact count, timestamps). Requires a valid list_id which can be obtained from the 'Get Lists' action. | | `SENDFOX_GET_LISTS` | Get Lists | Retrieve all contact lists from your SendFox account with pagination support. Use this tool when you need to: - Fetch all available contact lists for your account - Get list IDs to use with other SendFox actions (e.g., adding contacts to lists) - Check list names and browse through paginated results Returns a list of contact lists with their IDs and names, along with pagination metadata. | | `SENDFOX_LIST_CONTACT_FIELDS` | List Contact Fields | Tool to list all custom contact fields defined by the user. Returns a paginated list of contact fields with their IDs, names, and timestamps. | | `SENDFOX_LIST_UNSUBSCRIBED_CONTACTS` | List Unsubscribed Contacts | Tool to retrieve a paginated list of contacts who have unsubscribed. Use when you need to fetch unsubscribed contacts, optionally filtering by search query. | | `SENDFOX_PATCH_UNSUBSCRIBE_CONTACT` | Unsubscribe Contact | Unsubscribe a contact from all email communications in your SendFox account. Use this tool when you need to: - Globally unsubscribe a contact from all future emails - Honor unsubscribe requests from subscribers - Mark a contact as opted-out The contact will be marked as unsubscribed but remains in your contacts database. This is a permanent action - the contact will not receive any future campaigns. | | `SENDFOX_POST_CREATE_CONTACT` | Create Contact | Create a new contact (subscriber) in your SendFox account. Use this tool when you need to: - Add a new subscriber to your email list - Create a contact with optional first/last name - Add a contact to one or more specific lists If the contact already exists, their information will be updated with the provided data. | | `SENDFOX_POST_CREATE_LIST` | Create List | Create a new contact list in your SendFox account. Use this tool when you need to: - Create a new mailing list for organizing contacts - Set up a list before adding subscribers to it - Segment your audience by creating topic-specific lists The list will be created with 0 contacts initially. After creation, use other SendFox actions to add contacts to this list. Returns the created list's ID, name, and metadata. | ## 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 Sendfox from Atomic Agent With your account connected, ask Atomic Agent to work with Sendfox 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 Sendfox MCP Agent with another framework - [OpenAI Agents SDK](https://composio.dev/toolkits/sendfox/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/sendfox/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/sendfox/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/sendfox/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/sendfox/framework/codex) - [OpenClaw](https://composio.dev/toolkits/sendfox/framework/openclaw) - [Hermes](https://composio.dev/toolkits/sendfox/framework/hermes-agent) - [Google ADK](https://composio.dev/toolkits/sendfox/framework/google-adk) - [LangChain](https://composio.dev/toolkits/sendfox/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/sendfox/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/sendfox/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/sendfox/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/sendfox/framework/crew-ai) - [Pydantic AI](https://composio.dev/toolkits/sendfox/framework/pydantic-ai) - [AutoGen](https://composio.dev/toolkits/sendfox/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 Sendfox MCP? With a standalone Sendfox MCP server, the agents and LLMs can only access a fixed set of Sendfox tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Sendfox 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 Sendfox tools. ### Can I manage the permissions and scopes for Sendfox while using Tool Router? Yes, absolutely. You can configure which Sendfox 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 Sendfox data and credentials are handled as safely as possible. --- [See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)