# tags.notion.sync

Sync a linked project with Notion now, with tagId and idempotencyKey (linked projects also sync about hourly). Fields change only on the side that isn't the source of truth. A field the other side changed since they last agreed is not overwritten: it is returned in project.conflicts for a person to resolve with accounting_tags_notion_resolve.

`POST /api/v1/accounting/tags.notion.sync`

Permissions: `accounting:read`, `accounting:write` · Roles: admin, finance · Idempotency key required · Reaches outside Oatmilk (email or a provider)

MCP tool: `accounting_tags_notion_sync`

## Fields

| Field | Type | Required | Notes |
| --- | --- | --- | --- |
| `tagId` | string (ID) | Yes | The ID of a project tag, from tags.list. |
| `idempotencyKey` | string | Yes | Any unique text you generate once per intended change, so a retried request only happens once. Send it as the Idempotency-Key header instead if you prefer; if you send both they must match. 8–200 characters. |

## Example request

```bash
curl https://app.getoatmilk.com/api/v1/accounting/tags.notion.sync \
  -H "Authorization: Bearer $OATMILK_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
  "tagId": "7f0f6c1e-1c1f-4b5e-9c8d-2f5e8e3c1a10"
}'
```

Reference page: https://app.getoatmilk.com/docs/api/tags.notion.sync