How to integrate Missive MCP with Hermes

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Introduction

Hermes is a 24/7 autonomous agent that lives on your computer or server — it remembers what it learns and evolves as your usage grows.

This guide explains the easiest and most robust way to connect your Missive account to Hermes. You can do this through either Composio Connect CLI or Composio Connect MCP. For personal use we recommend the CLI, but you won't go wrong with MCP either.

Also integrate Missive with

What is Composio Connect?

Composio Connect is a consumer offering that lets anyone plug 1,000+ applications directly into their agent harness — including Hermes. It can:

  • Search and load tools from relevant toolkits on-demand, reducing context usage.
  • Chain multiple tools to accomplish complex workflows via a remote workbench, without excessive back-and-forth with the LLM.
  • Manage app authentication end-to-end with zero manual overhead.

Integrating Missive with Hermes

Using Composio Connect CLI

1. Install the Composio CLI

Run the install script directly, or paste https://composio.dev/hermes into your Hermes chat box to have it installed for you.

bash
curl -fsSL https://composio.dev/install | bash
Hermes authenticating with Composio

2. Authenticate

Once the CLI is installed, ask Hermes to authenticate with Composio.

3. Connect to Missive

Ask your agent to connect to Missive, or simply request any Missive-related task. Hermes will prompt you to authenticate and authorize access.

4. Done. You're all set with a new Missive connection.

Using Composio Connect MCP

1. Get your MCP URL and API Key

Go to dashboard.composio.dev and copy your Connect MCP URL and API key.

Copy MCP URL and API key from Composio dashboard

2. Open the Hermes config file

bash
nano ~/.hermes/config.yaml

3. Add the Composio Connect MCP server

bash
mcp_servers:
  composio:
    url: "https://connect.composio.dev/mcp"
    headers:
      x-consumer-api-key: "YOUR_COMPOSIO_API_KEY"
    connect_timeout: 60
    timeout: 180

Save with Ctrl + O, Enter, then exit with Ctrl + X.

4. Restart your Hermes agent

Once restarted, ask your agent to connect to Missive or request any Missive-related task. It will prompt you to authenticate and authorize access.

5. Done!

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 & Triggers

Tools
Create Analytics ReportTool to create an analytics report.
Create Missive ContactsTool to create one or more contacts in a Missive contact book.
Create DraftTool to create a new draft in Missive.
Create Missive PostTool to create a post in a Missive conversation.
Create Canned ResponseTool to create one or more canned responses (templates) in Missive.
Create Shared LabelTool to create one or more shared labels at the organization level.
Create Missive TaskTool to create a task in Missive.
Create TeamTool to create a new team in an organization.
Create WebhookTool to create a webhook subscription.
Delete DraftTool to delete a draft from a conversation by draft ID.
Delete PostTool to delete a post from a conversation by post ID.
Delete Saved ResponsesTool to delete one or more saved responses by ID.
Delete WebhookTool to delete a webhook subscription by webhook ID.
Get Analytics ReportTool to fetch a completed analytics report using its ID.
Get Missive ContactTool to fetch a specific contact using the contact ID.
Get Missive ConversationTool to fetch full conversation metadata (assignees/users/labels/team/org) for a specific conversation ID.
List Conversation MessagesTool to list messages belonging to a Missive conversation (newest first).
Get Missive MessageTool to fetch full message details including headers, HTML body, and attachments.
Get Missive ResponseTool to fetch a specific saved response using the response ID.
Get Missive TaskTool to get a single task by ID with full details including assignees, team, and conversation info.
List Missive Contact BooksTool to list contact books the authenticated user has access to.
List Missive Contact GroupsTool to list contact groups or organizations linked to a contact book.
List Missive ContactsTool to list contacts from a contact book.
List Conversation CommentsTool to list comments in a Missive conversation ordered from newest to oldest.
List Conversation DraftsTool to list draft messages in a Missive conversation (newest first).
List Conversation PostsTool to list posts in a Missive conversation ordered by newest first.
List Missive ConversationsTool to list conversations visible to the authenticated user ordered by newest activity first.
List Messages by Message-IDTool to fetch messages matching an email Message-ID header.
List Missive OrganizationsTool to list organizations the authenticated user is part of.
List Missive Saved ResponsesTool to list saved responses (canned responses/templates) for the authenticated user.
List Missive Shared LabelsTool to list shared labels (organization-level labels) available to the authenticated user.
List Missive TasksTool to list tasks accessible to the authenticated user.
List Missive TeamsTool to list all teams.
List Missive UsersTool to list all users.
Merge Missive ConversationsTool to merge multiple conversations into one.
Update Missive ContactTool to update one or more contacts in Missive.
Update Saved ResponseTool to update one or more saved responses in Missive.
Update Shared LabelsTool to update one or more shared labels in Missive.
Update Missive TaskTool to update an existing task's attributes in Missive.
Update Missive TeamTool to update one or more teams in Missive.

Way Forward

With Missive connected, Hermes can now act on your behalf whenever it detects a relevant task or you ask it to.

From here, you can extend Hermes further:

  • Connect more apps: Calendar, Slack, Notion, Linear, and hundreds of others are available through the same Composio Connect setup. Each new integration compounds what Hermes can do for you.
  • Build workflows across tools: Once multiple apps are connected, Hermes can chain actions together — turn an email into a calendar invite, a Slack message into a Linear ticket, or a meeting note into a follow-up draft.
  • Let it learn your patterns: The more you use Hermes, the better it gets at anticipating how you'd handle recurring tasks. Give it feedback on drafts and decisions, and it will adapt.

If you run into trouble or want to share what you've built, join the community or check out the Docs for deeper configuration options.

How to build Missive MCP Agent with another framework

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Use Missive MCP with Claude Agent SDK

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Use Missive MCP with Claude Cowork

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Use Missive MCP with CLI

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Google ADK

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CrewAI

Use Missive MCP with CrewAI

FAQ

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 Hermes?

Yes, you can. Hermes 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.

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