How to connect Reply io to Claude Cowork

Trusted by teams atAWSGleanZoomAirtable

30 min · no commitment · see it on your stack

Reply io logo
Claude Cowork logo
divider

Introduction

Cowork is Anthropic's AI agent for knowledge work. Think of it as Claude Code for everything else. It works autonomously with your computer, local files, and applications to accomplish complex tasks.

This guide walks you through the easiest and most secure way to connect your Reply io account to Cowork via Composio Connect, enabling it to list all active campaigns this week, show contacts added to sales lists, delete a campaign by campaign ID, and more such actions on your behalf without compromising your account security.

Also integrate Reply io with

Connecting Reply io to Claude Cowork

1. Open Customize

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

2. Add the Composio MCP server

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

3. 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 Cowork

4. Connect your Reply io account

Back in Cowork, ask the agent to connect to Reply io or give it any Reply io-related task.

For example, ask Cowork to:

  • "List all active campaigns this week"
  • "Show contacts added to sales lists"
  • "Delete a campaign by campaign ID"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Cowork, and your Reply io account is ready to use.

What is Claude Cowork?

Claude Cowork is Anthropic's agent for general knowledge work. It can use your computer, files, and connected applications to complete longer-running tasks across your work tools.

With Composio Connect, Cowork can securely access apps like Reply io through MCP without you sharing account credentials directly with the agent.

What is the Reply io MCP server, and what's possible with it?

The Reply io MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Reply io account. It provides structured and secure access to your sales engagement platform, so your agent can manage campaigns, handle contacts, organize sequences, and automate routine sales operations on your behalf.

  • Campaign and sequence management: Effortlessly list, browse, and delete campaigns or sequences to keep your outreach organized and up to date.
  • Contact and list organization: Let your agent fetch, review, and organize your Reply io contacts and contact lists for targeted sales actions.
  • Email account administration: Retrieve all connected email accounts or remove outdated ones, making sure your sales tools stay streamlined.
  • User and access control: Easily remove users or generate unique identifiers for tasks, maintaining security and clarity in your team’s workflow.
  • Automated data retrieval: Quickly pull up paginated lists of campaigns, sequences, email accounts, or contact lists to inform your sales strategies and next steps.

Supported Tools & Triggers

Tools
Delete CampaignTool to delete a campaign by id.
Delete Email AccountTool to delete a specific email account.
Delete SequenceTool to delete a sequence.
Delete UserTool to delete a user.
Generate ULIDTool to generate a ulid string.
List CampaignsTool to list all campaigns (sequences).
Reply.io List ContactsTool to list all contacts.
Reply.io List Email AccountsTool to list all email accounts.
Reply.io List ListsTool to list all contact lists.
List SequencesTool to retrieve a paginated list of sequences.
Search Contacts by EmailTool to search contacts by email.

How to build Reply io MCP Agent with another framework

FAQ

What are the differences in Tool Router MCP and Reply io MCP?

With a standalone Reply io MCP server, the agents and LLMs can only access a fixed set of Reply io tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Reply io and many other apps based on the task at hand, all through a single MCP endpoint.

Can I use Tool Router MCP with Claude Cowork?

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 Reply io tools.

Can I manage the permissions and scopes for Reply io while using Tool Router?

Yes, absolutely. You can configure which Reply io 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 Reply io data and credentials are handled as safely as possible.

Used by agents from

Context
Letta
glean
HubSpot
Agent.ai
Altera
DataStax
Entelligence
Rolai
Context
Letta
glean
HubSpot
Agent.ai
Altera
DataStax
Entelligence
Rolai
Context
Letta
glean
HubSpot
Agent.ai
Altera
DataStax
Entelligence
Rolai

Never worry about agent reliability

We handle tool reliability, observability, and security so you never have to second-guess an agent action.