update_category_for_month
Set the budgeted amount for a category in a specific month in your YNAB plan by passing the plan ID, category ID, month, and dollar amount.
Instructions
Update the budgeted amount for a category in a specific month.
Args: category_id: The category ID month: Month in YYYY-MM-DD format (use first of month, e.g. '2026-03-01') budgeted: Budgeted amount in dollars (e.g. 500.00) plan_id: The plan ID (use list_plans to find available IDs) exclude_fields: Optional list of field names to exclude from the response. If omitted, the model's default exclude list is used (see FIELDS.md). Pass [] to return all fields. Pass a custom list to override the default.
Tool call template
Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.
{
"id": 1,
"jsonrpc": "2.0",
"method": "tools/call",
"params": {
"arguments": {
"category_id": "<category_id>",
"month": "<month>",
"budgeted": "<budgeted>",
"plan_id": "<plan_id>"
},
"name": "update_category_for_month"
}
}Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| month | Yes | ||
| plan_id | Yes | ||
| budgeted | Yes | ||
| category_id | Yes | ||
| exclude_fields | No |
Output Schema
| Name | Required | Description | Default |
|---|---|---|---|
| result | Yes |