List all groups for the current user. Groups represent collections of users who share expenses together (e.g., household, trip, etc.).

Get detailed information about a specific group, including members, balances, and settings.

List expenses with optional filters. Can filter by group, friend, date range, or update time.

Get detailed information about a specific expense, including all users involved and their shares.

Create a new expense. Can split equally among group members or specify custom shares for each user. For custom shares, provide users array with paid_share and owed_share for each user.

Update an existing expense. Only include fields that are changing. If users array is provided, all shares will be overwritten.

Delete an expense permanently.

Restore a deleted expense.

Get a list of all expense categories supported by Splitwise. Use subcategory IDs when creating expenses.