# How to integrate Missive MCP with Atomic Agent ```json { "title": "How to integrate Missive MCP with Atomic Agent", "toolkit": "Missive", "toolkit_slug": "missive", "framework": "Atomic Agent", "framework_slug": "atomic-agent", "url": "https://composio.dev/toolkits/missive/framework/atomic-agent", "markdown_url": "https://composio.dev/toolkits/missive/framework/atomic-agent.md", "updated_at": "2026-08-11T13:12:17.009Z" } ``` ## 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 Missive. 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 Missive account. See the [Atomic Agent documentation](https://atomicagent.io/docs/?cta_placement=atomic-agent-docs) for installation instructions. ## Also integrate Missive with - [OpenAI Agents SDK](https://composio.dev/toolkits/missive/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/missive/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/missive/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/missive/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/missive/framework/codex) - [OpenClaw](https://composio.dev/toolkits/missive/framework/openclaw) - [Hermes](https://composio.dev/toolkits/missive/framework/hermes-agent) - [Google ADK](https://composio.dev/toolkits/missive/framework/google-adk) - [LangChain](https://composio.dev/toolkits/missive/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/missive/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/missive/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/missive/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/missive/framework/crew-ai) - [Pydantic AI](https://composio.dev/toolkits/missive/framework/pydantic-ai) - [AutoGen](https://composio.dev/toolkits/missive/framework/autogen) ## TL;DR ### How Atomic Agent connects to Missive 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 Missive to Atomic Agent ### Connect Missive 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 Missive. It searches Composio for the right tool. - On first use, open the sign-in link returned in the chat. Connect your Missive 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 Missive MCP server, and what's possible with it? The Missive MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Missive account. It provides structured and secure access to your team's shared inboxes and chat threads, so your agent can perform actions like drafting emails, sending messages, generating reports, and managing team communication on your behalf. - Automated message drafting and scheduling: Let your agent create and save email, SMS, WhatsApp, or live chat drafts for later editing or scheduled sending. - Instant message sending in conversations: Have your agent send new messages directly to any Missive conversation, keeping your team in the loop in real time. - Team and user management: Effortlessly list all teams and their members, or pull a full directory of users in your Missive organization for easy coordination and task assignment. - Analytics report generation: Direct your agent to create detailed analytics reports across time ranges and filters, helping your team track productivity and engagement. - Webhook automation setup: Enable your agent to create or delete webhook subscriptions, so you can automate notifications and integrations with other tools as needed. ## Supported Tools | Tool slug | Name | Description | |---|---|---| | `MISSIVE_CREATE_ANALYTICS_REPORT` | Create Analytics Report | Tool to create an analytics report. Use when you need to generate a report over a specific time range with optional filters. Returns a report ID for later retrieval. | | `MISSIVE_CREATE_CONTACTS` | Create Missive Contacts | Tool to create one or more contacts in a Missive contact book. Use when you need to add new contacts with detailed information including name, email, phone, addresses, and organization memberships. | | `MISSIVE_CREATE_DRAFT` | Create Draft | Tool to create a new draft in Missive. Use after preparing message details to save a draft (email, SMS, WhatsApp, or Live Chat) for later editing or scheduling. | | `MISSIVE_CREATE_POST` | Create Missive Post | Tool to create a post in a Missive conversation. Posts can add comments, close conversations, assign users, apply labels, and trigger other actions. Recommended approach for managing conversations from integrations and automations. | | `MISSIVE_CREATE_RESPONSE` | Create Canned Response | Tool to create one or more canned responses (templates) in Missive. Use when you need to save reusable message templates for the organization or user. | | `MISSIVE_CREATE_SHARED_LABEL` | Create Shared Label | Tool to create one or more shared labels at the organization level. Use when you need to create new labels that can be shared across the organization. | | `MISSIVE_CREATE_TASK` | Create Missive Task | Tool to create a task in Missive. Use when you need to create standalone tasks, conversation-linked subtasks, or team tasks. You can find or create parent conversations using message references (like email Message-IDs). | | `MISSIVE_CREATE_TEAM` | Create Team | Tool to create a new team in an organization. Use when you need to set up a new team with active members and optional observers. The API token must belong to an organization admin. | | `MISSIVE_CREATE_WEBHOOK` | Create Webhook | Tool to create a webhook subscription. Use after choosing event type and target URL. | | `MISSIVE_DELETE_DRAFT` | Delete Draft | Tool to delete a draft from a conversation by draft ID. Use after confirming the draft ID; this operation cannot be undone. | | `MISSIVE_DELETE_POST` | Delete Post | Tool to delete a post from a conversation by post ID. Use when you need to remove a specific post; this operation cannot be undone. | | `MISSIVE_DELETE_RESPONSES` | Delete Saved Responses | Tool to delete one or more saved responses by ID. For organization responses, the API token must belong to an admin. Use after confirming the response ID(s); this operation cannot be undone. | | `MISSIVE_DELETE_WEBHOOK` | Delete Webhook | Tool to delete a webhook subscription by webhook ID. Use after confirming the webhook ID; this operation cannot be undone. | | `MISSIVE_GET_ANALYTICS_REPORT` | Get Analytics Report | Tool to fetch a completed analytics report using its ID. Use when you need to retrieve analytics data after creating a report. Reports typically complete within 2-3 seconds but may take up to 30 seconds. Reports expire 60 seconds after completion and return 404 if incomplete, expired, or non-existent. | | `MISSIVE_GET_CONTACT` | Get Missive Contact | Tool to fetch a specific contact using the contact ID. Use when you need detailed contact information including names, contact info, and organizational memberships. Returns 404 for deleted contacts. | | `MISSIVE_GET_CONVERSATION` | Get Missive Conversation | Tool to fetch full conversation metadata (assignees/users/labels/team/org) for a specific conversation ID. Use when you need conversation-level details for assignment, labeling, or workflow purposes. | | `MISSIVE_GET_CONVERSATION_MESSAGES` | List Conversation Messages | Tool to list messages belonging to a Missive conversation (newest first). Use when you need to retrieve message metadata including participants and attachments references for a specific conversation. | | `MISSIVE_GET_MESSAGE` | Get Missive Message | Tool to fetch full message details including headers, HTML body, and attachments. Use when you need complete message content with download URLs for attachments. | | `MISSIVE_GET_RESPONSE` | Get Missive Response | Tool to fetch a specific saved response using the response ID. Use when you need to retrieve the full content and metadata of a saved response template. | | `MISSIVE_GET_TASK` | Get Missive Task | Tool to get a single task by ID with full details including assignees, team, and conversation info. Use when you need to retrieve complete information about a specific task. | | `MISSIVE_LIST_CONTACT_BOOKS` | List Missive Contact Books | Tool to list contact books the authenticated user has access to. Use when you need contact book IDs for creating contacts programmatically. | | `MISSIVE_LIST_CONTACT_GROUPS` | List Missive Contact Groups | Tool to list contact groups or organizations linked to a contact book. Use when you need to retrieve groups for organizing contacts or organizations for linking contacts to businesses. | | `MISSIVE_LIST_CONTACTS` | List Missive Contacts | Tool to list contacts from a contact book. Use when syncing Missive contacts to another service or finding contacts based on search terms. Supports pagination via offset and filtering by modification date. | | `MISSIVE_LIST_CONVERSATION_COMMENTS` | List Conversation Comments | Tool to list comments in a Missive conversation ordered from newest to oldest. Use when you need to retrieve comments with author info, attachments, and task data for a specific conversation. | | `MISSIVE_LIST_CONVERSATION_DRAFTS` | List Conversation Drafts | Tool to list draft messages in a Missive conversation (newest first). Use when you need to retrieve unsent drafts for a specific conversation including author and recipient details. | | `MISSIVE_LIST_CONVERSATION_POSTS` | List Conversation Posts | Tool to list posts in a Missive conversation ordered by newest first. Use when you need to view automation traces or post history for a specific conversation. Posts are the recommended approach for automations as they leave a visible trace. | | `MISSIVE_LIST_CONVERSATIONS` | List Missive Conversations | Tool to list conversations visible to the authenticated user ordered by newest activity first. Use when you need to retrieve inbox, all, assigned, closed, or other mailbox conversations. Must filter by at least one of: mailbox flag, shared label, or team parameter. | | `MISSIVE_LIST_MESSAGES` | List Messages by Message-ID | Tool to fetch messages matching an email Message-ID header. Use when you need to find a specific message by its Message-ID. Most of the time, only one message matches a given Message-ID. | | `MISSIVE_LIST_ORGANIZATIONS` | List Missive Organizations | Tool to list organizations the authenticated user is part of. Use when you need to retrieve all organizations accessible to the current user. | | `MISSIVE_LIST_RESPONSES` | List Missive Saved Responses | Tool to list saved responses (canned responses/templates) for the authenticated user. Use when you need to retrieve available response templates for composing messages. | | `MISSIVE_LIST_SHARED_LABELS` | List Missive Shared Labels | Tool to list shared labels (organization-level labels) available to the authenticated user. Use when you need to retrieve labels for filtering conversations or understanding label structure. | | `MISSIVE_LIST_TASKS` | List Missive Tasks | Tool to list tasks accessible to the authenticated user. Use when you need to retrieve tasks by state, organization, or team. Tasks can be standalone, conversation-linked, or team tasks. | | `MISSIVE_LIST_TEAMS` | List Missive Teams | Tool to list all teams. Use when you need to retrieve and enumerate all teams available in Missive. Returns an empty array for accounts with no teams configured; this is a valid response, not an error. | | `MISSIVE_LIST_USERS` | List Missive Users | Tool to list all users. Use after authentication when you need to retrieve all users in the organization. | | `MISSIVE_MERGE_CONVERSATIONS` | Merge Missive Conversations | Tool to merge multiple conversations into one. Combines messages, posts, and other content from the source conversation into the target conversation. Use when you need to consolidate related conversations. | | `MISSIVE_UPDATE_CONTACT` | Update Missive Contact | Tool to update one or more contacts in Missive. Use when you need to modify contact attributes. Only pass fields you want to update. CRITICAL: infos and memberships arrays must include ALL items when passed - omitted entries will be permanently deleted. | | `MISSIVE_UPDATE_RESPONSE` | Update Saved Response | Tool to update one or more saved responses in Missive. Use when you need to modify existing response templates by changing title, body, subject, or other attributes. Returns the updated responses. | | `MISSIVE_UPDATE_SHARED_LABELS` | Update Shared Labels | Tool to update one or more shared labels in Missive. Use when you need to modify label names or colors. Returns the updated shared labels. | | `MISSIVE_UPDATE_TASK` | Update Missive Task | Tool to update an existing task's attributes in Missive. Use when you need to modify a task's description, change its state, update the due date, or reassign it to different users. | | `MISSIVE_UPDATE_TEAM` | Update Missive Team | Tool to update one or more teams in Missive. Use when you need to modify team attributes like name, color, or initials. The API token must belong to an organization admin. | ## 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 Missive from Atomic Agent With your account connected, ask Atomic Agent to work with Missive 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 Missive MCP Agent with another framework - [OpenAI Agents SDK](https://composio.dev/toolkits/missive/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/missive/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/missive/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/missive/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/missive/framework/codex) - [OpenClaw](https://composio.dev/toolkits/missive/framework/openclaw) - [Hermes](https://composio.dev/toolkits/missive/framework/hermes-agent) - [Google ADK](https://composio.dev/toolkits/missive/framework/google-adk) - [LangChain](https://composio.dev/toolkits/missive/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/missive/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/missive/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/missive/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/missive/framework/crew-ai) - [Pydantic AI](https://composio.dev/toolkits/missive/framework/pydantic-ai) - [AutoGen](https://composio.dev/toolkits/missive/framework/autogen) ## Related Toolkits - [Gmail](https://composio.dev/toolkits/gmail) - Gmail is Google's email service with powerful spam protection, search, and G Suite integration. It keeps your inbox organized and makes communication fast and reliable. - [Outlook](https://composio.dev/toolkits/outlook) - Outlook is Microsoft's email and calendaring platform for unified communications and scheduling. It helps users stay organized with powerful email, contacts, and calendar management. - [Slack](https://composio.dev/toolkits/slack) - Slack is a channel-based messaging platform for teams and organizations. It helps people collaborate in real time, share files, and connect all their tools in one place. - [Gong](https://composio.dev/toolkits/gong) - Gong is a platform for video meetings, call recording, and team collaboration. It helps teams capture conversations, analyze calls, and turn insights into action. - [Microsoft teams](https://composio.dev/toolkits/microsoft_teams) - Microsoft Teams is a collaboration platform that combines chat, meetings, and file sharing within Microsoft 365. It keeps distributed teams connected and productive through seamless virtual communication. - [Slackbot](https://composio.dev/toolkits/slackbot) - Slackbot is a conversational automation tool for Slack that handles reminders, notifications, and automated responses. It boosts team productivity by streamlining onboarding, answering FAQs, and managing timely alerts—all right inside Slack. - [2chat](https://composio.dev/toolkits/_2chat) - 2chat is an API platform for WhatsApp and multichannel text messaging. It streamlines chat automation, group management, and real-time messaging for developers. - [Agent mail](https://composio.dev/toolkits/agent_mail) - Agent mail provides AI agents with dedicated email inboxes for sending, receiving, and managing emails. It empowers agents to communicate autonomously with people, services, and other agents—no human intervention needed. - [Android Texter](https://composio.dev/toolkits/android_texter) - Android Texter is an API service that connects Android phones to SMS, MMS, contacts, and device data. Use it to automate mobile messaging without building your own phone-to-API bridge. - [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. - [Blooio](https://composio.dev/toolkits/blooio) - Blooio is a stable v2 API platform for messaging, chats, contacts, groups, phone numbers, and account analytics. It gives teams a clean way to build reliable communication workflows without stitching together fragile custom APIs. - [CallOnTheGo](https://composio.dev/toolkits/callonthego) - CallOnTheGo is a telephony API for managing phone numbers, caller IDs, suppression lists, audio assets, contact lists, and Voice AI campaigns. It provides programmatic control over calling infrastructure and campaign automation for scalable voice outreach. - [Carbon Voice MCP](https://composio.dev/toolkits/carbon_voice_mcp) - Carbon Voice MCP is a voice-first collaboration platform for messages, conversations, and workflows. Use it to centralize voice communications and streamline team collaboration. - [CardClan](https://composio.dev/toolkits/cardclan) - CardClan is a digital card platform for creating and sending personalized team cards. Use it to celebrate moments, share card links, and manage card workflows without extra coordination. - [Chatwork](https://composio.dev/toolkits/chatwork) - Chatwork is a team communication platform with group chats, file sharing, and task management. It helps businesses boost collaboration and streamline productivity. - [Clickmeeting](https://composio.dev/toolkits/clickmeeting) - ClickMeeting is a cloud-based platform for running online meetings and webinars. It helps businesses and individuals host, manage, and engage virtual audiences with ease. - [Confluence](https://composio.dev/toolkits/confluence) - Confluence is Atlassian's team collaboration and knowledge management platform. It helps your team organize, share, and update documents and project content in one secure workspace. - [Daily](https://composio.dev/toolkits/daily) - Daily is a WebRTC video and audio API platform for building rooms, meetings, recordings, live streams, transcriptions, and telephony. It gives developers reliable real-time media infrastructure without managing complex conferencing stacks. - [Dailybot](https://composio.dev/toolkits/dailybot) - DailyBot streamlines team collaboration with chat-based standups, reminders, and polls. It keeps work flowing smoothly in your favorite messaging platforms. - [Dialmycalls](https://composio.dev/toolkits/dialmycalls) - Dialmycalls is a mass notification service for sending voice and text messages to contacts. It helps teams and organizations quickly broadcast urgent alerts and updates. ## Frequently Asked Questions ### What are the differences in Tool Router MCP and Missive MCP? With a standalone Missive MCP server, the agents and LLMs can only access a fixed set of Missive tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Missive 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 Missive tools. ### Can I manage the permissions and scopes for Missive while using Tool Router? Yes, absolutely. You can configure which Missive 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 Missive data and credentials are handled as safely as possible. --- [See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)