README

gr-splitwise-mcp

MCP server for Splitwise. Create and manage expenses, splits, and groups directly from Claude — no manual entry.

Tools

Tool	What it does
`list_groups`	List all your Splitwise groups with IDs
`list_group_members`	List members of a group with user IDs
`create_group`	Create a new group and add members
`create_expense`	Create an expense with per-user splits, date, and notes
`update_expense`	Update any field on an existing expense
`delete_expense`	Delete an expense by ID

Setup

1. Get your Splitwise API key

Go to https://secure.splitwise.com/apps, create a new app, and copy the API key.

2. Add to Claude Desktop

{
  "mcpServers": {
    "splitwise": {
      "command": "uvx",
      "args": ["gr-splitwise-mcp"],
      "env": {
        "SPLITWISE_API_KEY": "your-api-key-here"
      }
    }
  }
}

3. Add to Claude Code

claude mcp add splitwise -e SPLITWISE_API_KEY=your-api-key-here -- uvx gr-splitwise-mcp

Usage examples

Create an expense with a custom split:

Create a Splitwise expense for dinner at Zaika, $259.59, in group 97230678.
I paid. Split 75% to me (user 94211279) and 25% to Suhas (user 24465843).
Date: May 2, notes: "Niagara Falls trip dinner"

Create a group:

Create a Splitwise group called "Barcelona Trip 2026", type trip,
and add user 24465843 as a member.

Update an expense date/notes:

Update expense 4451638821 — set date to 2026-03-19 and notes to "Turo car rental booking"

Notes

Dates are automatically normalized to noon UTC to avoid timezone display issues in the Splitwise app
All splits must sum exactly to the total cost
Use list_groups and list_group_members to find IDs before creating expenses

gr-splitwise-mcp

README

gr-splitwise-mcp

Tools

Setup

1. Get your Splitwise API key

2. Add to Claude Desktop

3. Add to Claude Code

Usage examples

Notes

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