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How to connect Missive to Claude

Connect Claude Web, Desktop and Cowork to Missive MCP. List all team members for marketing, create a draft email for client follow-up, and more using natural language, with authentication handled for you.

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Missive is a collaborative email and chat app for teams to manage conversations and tasks together. It helps streamline team inboxes, shared labels, and internal discussion in one place.

40 Tools

Introduction

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your Missive account to Claude via Composio Connect, enabling it to list all team members for marketing, create a draft email for client follow-up, send a chat message in project conversation, and more such actions on your behalf without compromising your account security.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

Also integrate Missive with

Claude CodeOpenAI Agents SDKClaude Agent SDKCodexOpenClawHermesAtomic AgentGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAIPydantic AIAutoGen

Connecting Missive to Claude Web, Desktop, and Cowork

Two ways to add the Composio connector. Pick whichever you prefer.

1. Add with one click

Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2.

Add to Claude

Add manually

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

2. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Web, Desktop, and Cowork

3. Connect your Missive account

Back in Claude, ask it to connect to Missive or give it any Missive-related task.

For example, ask Claude to:

  • "List all team members for marketing"
  • "Create a draft email for client follow-up"
  • "Send a chat message in project conversation"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Claude, and your Missive account is ready to use.

What is the Missive Claude Connector, 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.

Troubleshooting

1. Why does Claude not use the Composio connector for Missive?

The connector can show as connected, but Claude must use it in each Missive conversation.

  • Click + at the lower left of the chat, or type /.
  • Hover Connectors.
  • Turn on Composio.
  • Ask Claude to connect to Missive again.

2. Why does Claude show an MCP server error before Missive connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for Missive.

  • Check that the connector URL is https://connect.composio.dev/mcp.
  • Connectors run from Anthropic's cloud, so your device network is usually not the problem.
  • Add the connector again from Customize > Connectors, then ask Claude to connect Missive.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Missive authorization link not work?

The Composio connector is one server. Your Missive account connects separately when Claude asks for it.

  • If the browser does not open, or the link expires, ask Claude to retry the Missive connection.
  • Composio creates a fresh Missive authorization link.
  • Open that link in your browser and finish the Missive sign-in.

4. Why do Missive actions fail after they worked before?

The Missive connection can expire or lose permission.

  • Ask Claude to inspect the Missive connection.
  • If the connection is unhealthy, disconnect it when Claude prompts you.
  • Reconnect the Missive account and retry the action.
  • If Claude shows a permission prompt, approve it before Claude changes data in Missive.
  • If the action still fails with a permission error, check that the connected account has that permission in Missive itself.

5. How do I switch to a different Missive account?

Claude can manage the Missive connection for you.

  • Ask Claude to disconnect or delete the current Missive account.
  • Ask Claude to connect Missive again.
  • Open the new Composio authorization link for Missive.
  • Sign in with the other Missive account in the browser.
  • After the account connects, ask Claude to retry the Missive task.

6. Why is my Missive connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your Missive connection works in Claude Web, Desktop, and Cowork.

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Missive tools still do not appear, click ⋮, disconnect, remove the connector, and add it again.
  • On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect Missive.
TOOLS

Supported Tools

Every Missive action and event your agent gets out of the box.

Create Analytics Report

Tool to create an analytics report.

Create Missive Contacts

Tool to create one or more contacts in a Missive contact book.

Create Draft

Tool to create a new draft in Missive.

Create Missive Post

Tool to create a post in a Missive conversation.

Create Canned Response

Tool to create one or more canned responses (templates) in Missive.

Create Shared Label

Tool to create one or more shared labels at the organization level.

Create Missive Task

Tool to create a task in Missive.

Create Team

Tool to create a new team in an organization.

Create Webhook

Tool to create a webhook subscription.

Delete Draft

Tool to delete a draft from a conversation by draft ID.

Delete Post

Tool to delete a post from a conversation by post ID.

Delete Saved Responses

Tool to delete one or more saved responses by ID.

Delete Webhook

Tool to delete a webhook subscription by webhook ID.

Get Analytics Report

Tool to fetch a completed analytics report using its ID.

Get Missive Contact

Tool to fetch a specific contact using the contact ID.

Get Missive Conversation

Tool to fetch full conversation metadata (assignees/users/labels/team/org) for a specific conversation ID.

List Conversation Messages

Tool to list messages belonging to a Missive conversation (newest first).

Get Missive Message

Tool to fetch full message details including headers, HTML body, and attachments.

Get Missive Response

Tool to fetch a specific saved response using the response ID.

Get Missive Task

Tool to get a single task by ID with full details including assignees, team, and conversation info.

List Missive Contact Books

Tool to list contact books the authenticated user has access to.

List Missive Contact Groups

Tool to list contact groups or organizations linked to a contact book.

List Missive Contacts

Tool to list contacts from a contact book.

List Conversation Comments

Tool to list comments in a Missive conversation ordered from newest to oldest.

List Conversation Drafts

Tool to list draft messages in a Missive conversation (newest first).

List Conversation Posts

Tool to list posts in a Missive conversation ordered by newest first.

List Missive Conversations

Tool to list conversations visible to the authenticated user ordered by newest activity first.

List Messages by Message-ID

Tool to fetch messages matching an email Message-ID header.

List Missive Organizations

Tool to list organizations the authenticated user is part of.

List Missive Saved Responses

Tool to list saved responses (canned responses/templates) for the authenticated user.

List Missive Shared Labels

Tool to list shared labels (organization-level labels) available to the authenticated user.

List Missive Tasks

Tool to list tasks accessible to the authenticated user.

List Missive Teams

Tool to list all teams.

List Missive Users

Tool to list all users.

Merge Missive Conversations

Tool to merge multiple conversations into one.

Update Missive Contact

Tool to update one or more contacts in Missive.

Update Saved Response

Tool to update one or more saved responses in Missive.

Update Shared Labels

Tool to update one or more shared labels in Missive.

Update Missive Task

Tool to update an existing task's attributes in Missive.

Update Missive Team

Tool to update one or more teams in Missive.

FRAMEWORKS

How to build Missive MCP Agent with another framework

Claude Code logo

Claude Code

Use Missive MCP with Claude Code

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Missive MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Missive MCP with Claude Agent SDK

Codex logo

Codex

Use Missive MCP with Codex

OpenClaw logo

OpenClaw

Use Missive MCP with OpenClaw

Hermes logo

Hermes

Use Missive MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Missive MCP with Atomic Agent

Google ADK logo

Google ADK

Use Missive MCP with Google ADK

LangChain logo

LangChain

Use Missive MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Missive MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Missive MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Missive MCP with LlamaIndex

CrewAI logo

CrewAI

Use Missive MCP with CrewAI

Pydantic AI logo

Pydantic AI

Use Missive MCP with Pydantic AI

AutoGen logo

AutoGen

Use Missive MCP with AutoGen

FAQ

Frequently asked questions

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.

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 Missive tools.

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.

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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