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How to connect Loops.so to Claude

Connect Claude Web, Desktop and Cowork to Loops.so MCP. Send onboarding email to new signups, segment contacts by plan and engagement, and more using natural language, with authentication handled for you.

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Loops.so is a modern email platform for SaaS companies to manage product, marketing, and transactional emails. It streamlines communication, so you can engage users with smarter, targeted campaigns.

12 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 Loops.so account to Claude via Composio Connect, enabling it to send onboarding email to new signups, segment contacts by plan and engagement, schedule a product update campaign, 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 Loops.so with

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

Connecting Loops.so 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 Loops.so account

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

For example, ask Claude to:

  • "Send onboarding email to new signups"
  • "Segment contacts by plan and engagement"
  • "Schedule a product update campaign"

It will prompt you to authenticate and authorize access.

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

What is the Loops.so Claude Connector, and what's possible with it?

The Loops.so MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Loops.so account. It provides structured and secure access so your agent can perform Loops.so operations on your behalf.

Troubleshooting

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

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

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

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

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

  • 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 Loops.so.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Loops.so authorization link not work?

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

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

4. Why do Loops.so actions fail after they worked before?

The Loops.so connection can expire or lose permission.

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

5. How do I switch to a different Loops.so account?

Claude can manage the Loops.so connection for you.

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

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

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

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Loops.so 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 Loops.so.
TOOLS

Supported Tools

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

Create Contact

Tool to add a new contact to your Loops audience.

Create Contact Property

Tool to add a custom contact property to your Loops team.

Delete Contact

Tool to delete a contact by email address or user ID.

Find Contact

Tool to search for a contact by email or userId.

Get Contact Properties

Tool to retrieve a list of your account's contact properties from Loops.

Get Dedicated Sending IPs

Tool to retrieve a list of Loops' dedicated sending IP addresses.

Get Mailing Lists

Tool to retrieve all mailing lists associated with your Loops account.

List Custom Fields

Tool to retrieve a list of custom contact properties.

List Transactional Emails

Tool to retrieve a list of published transactional emails.

Send Event

Tool to send events to trigger emails in Loops.

Test API Key

Tool to test API key validity and retrieve team information.

Update Contact

Tool to update an existing contact by email or userId.

FRAMEWORKS

How to build Loops.so MCP Agent with another framework

Claude Code logo

Claude Code

Use Loops.so MCP with Claude Code

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Loops.so MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Loops.so MCP with Claude Agent SDK

Codex logo

Codex

Use Loops.so MCP with Codex

OpenClaw logo

OpenClaw

Use Loops.so MCP with OpenClaw

Hermes logo

Hermes

Use Loops.so MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Loops.so MCP with Atomic Agent

Google ADK logo

Google ADK

Use Loops.so MCP with Google ADK

LangChain logo

LangChain

Use Loops.so MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Loops.so MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

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LlamaIndex logo

LlamaIndex

Use Loops.so MCP with LlamaIndex

CrewAI logo

CrewAI

Use Loops.so MCP with CrewAI

Pydantic AI logo

Pydantic AI

Use Loops.so MCP with Pydantic AI

AutoGen logo

AutoGen

Use Loops.so MCP with AutoGen

FAQ

Frequently asked questions

With a standalone Loops.so MCP server, the agents and LLMs can only access a fixed set of Loops.so tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Loops.so 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 Loops.so tools.

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

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