How to connect Splitwise to Claude Cowork

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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 Splitwise account to Cowork via Composio Connect, enabling it to add a new friend using their email, create a dinner expense split equally, list all groups I'm part of, and more such actions on your behalf without compromising your account security.

Also integrate Splitwise with

Connecting Splitwise 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 Splitwise account

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

For example, ask Cowork to:

  • "Add a new friend using their email"
  • "Create a dinner expense split equally"
  • "List all groups I'm part of"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Cowork, and your Splitwise 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 Splitwise through MCP without you sharing account credentials directly with the agent.

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

The Splitwise MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Splitwise account. It provides structured and secure access to your expenses and group data, so your agent can perform actions like creating expenses, adding friends, retrieving categories, and managing your account on your behalf.

  • Expense tracking and creation: Quickly have your agent record new expenses, split bills, or log payments—either between you and friends or within groups.
  • Friend and contact management: Easily add new friends with their email and name, or remove existing friends to keep your network current.
  • Group info and collaboration: Retrieve details about any group you belong to, making it simple to manage shared costs and stay organized with your housemates, travel buddies, or teams.
  • Expense category and currency lookup: Ask the agent to fetch available expense categories or supported currencies, helping you record transactions accurately and consistently.
  • Account and profile insights: Let your agent pull your current user details so you can quickly review account information or verify profile data as needed.

Supported Tools & Triggers

Tools
Add FriendTool to add a new friend to Splitwise.
Add User to GroupTool to add a user to a group.
Create CommentTool to create a comment on a specific expense.
Create ExpenseTool to create a new Splitwise expense.
Create FriendsTool to add multiple friends at once to Splitwise.
Create GroupTool to create a new group in Splitwise.
Delete CommentTool to delete a comment by its ID.
Delete ExpenseTool to delete an existing expense by its ID.
Delete FriendTool to delete an existing friend by ID.
Delete GroupTool to delete a group and all associated records by its ID.
Get CategoriesTool to retrieve expense categories.
Get CommentsTool to retrieve all comments associated with a specific expense.
Get CurrenciesTool to retrieve a list of supported currencies.
Get Current UserTool to retrieve information about the current authenticated user.
Get ExpenseTool to retrieve detailed information about a specific expense by ID.
Get ExpensesTool to list the current user's expenses from Splitwise account.
Get Friend DetailsTool to retrieve detailed information about a specific friend.
Get FriendsTool to list current user's friends on Splitwise.
Get Group DetailsTool to retrieve detailed information about a specific group.
Get GroupsRetrieves all groups the authenticated user belongs to, including group details, members, balances, and debt information.
Get NotificationsTool to retrieve recent activity notifications from the user's Splitwise account.
Get User InformationRetrieves basic profile information about any Splitwise user by their ID.
Remove User from GroupTool to remove a user from a group.
Restore Deleted ExpenseTool to restore a previously deleted expense and its associated records.
Restore Deleted GroupTool to restore a previously deleted group and all its associated records.
Update ExpenseTool to update an existing Splitwise expense.
Update UserTool to update user account details including name, email, password, and preferences.

How to build Splitwise MCP Agent with another framework

FAQ

What are the differences in Tool Router MCP and Splitwise MCP?

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

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

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

Used by agents from

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