# POST /api/v1/transactions/suggest-categories

> Category suggestions

- **Tag:** transactions
- **Operation ID:** `suggest_categories_api_v1_transactions_suggest_categories_post`

## Description

Suggest ledger categories for uncategorized transactions.  By default only fast pattern-matching layers run (<1 s).  Pass include_ai=true to also run LLM categorization for transactions the pattern layers could not resolve.

## Authentication

Bearer token in `Authorization` header.
Required header: `x-business-id: <business uuid>`.

## Parameters

- `limit` (query, integer, optional)
- `only_uncategorized` (query, boolean, optional)
- `include_ai` (query, boolean, optional)

## Responses

### 201 — Successful Response

Schema: `SuggestCategoriesResponse`

- `suggestions` (array · CategorySuggestionItem) → `CategorySuggestionItem`
  - `transaction_id` (string · required) — ID of the transaction
  - `suggested_ledger_id` (string · required) — Suggested ledger/account ID
  - `suggested_ledger_name` (string · required) — Suggested ledger/account name
  - `confidence` (number · required) — Confidence score 0-1
  - `reason` (string · required) — Brief reason for this suggestion
- `groups` (array · CounterpartySuggestionGroup) → `CounterpartySuggestionGroup` — Suggestions grouped by counterparty for bulk operations
  - `counterparty` (string · required) — Counterparty name
  - `suggested_ledger_id` (string · required) — Suggested ledger/account ID
  - `suggested_ledger_name` (string · required) — Suggested ledger/account name
  - `confidence` (number · required) — Avg confidence score
  - `reason` (string · required) — Strategy or pattern that matched
  - `transaction_ids` (array · string) — IDs of transactions in this group (from analyzed batch)
  - `transaction_count` (integer · required) — Total transactions for this counterparty (may exceed analyzed batch)
  - `sample_description` (string) — Example transaction description for context
- `count` (integer) — Number of suggestions returned
- `total_uncategorized` (integer) — Total uncategorized transactions in the business

### 401 — Unauthorized - Authentication required

### 403 — Forbidden - Insufficient permissions

### 422 — Validation Error

Schema: `HTTPValidationError`

- `detail` (array · ValidationError) → `ValidationError`
  - `loc` (array · string | integer · required)
  - `msg` (string · required)
  - `type` (string · required)
  - `input` (object)
  - `ctx` (object)

## Code samples

### cURL

```bash
curl -X POST 'https://api.ondayzero.com/api/v1/transactions/suggest-categories' \
  -H 'Authorization: Bearer dz_your_token' \
  -H 'x-business-id: YOUR_BUSINESS_ID'
```

### JavaScript

```javascript
const response = await fetch('https://api.ondayzero.com/api/v1/transactions/suggest-categories', {
  method: 'POST',
  headers: {
    Authorization: 'Bearer dz_your_token',
    'x-business-id': 'YOUR_BUSINESS_ID',
  },
});
const data = await response.json();
```

### Python

```python
import httpx

headers = {
    "Authorization": "Bearer dz_your_token",
    "x-business-id": "YOUR_BUSINESS_ID",
}

response = httpx.post("https://api.ondayzero.com/api/v1/transactions/suggest-categories", headers=headers)
data = response.json()
```

## See also

- HTML version: https://www.ondayzero.com/docs/reference/transactions/suggest-categories
- OpenAPI slice: https://www.ondayzero.com/docs/reference/transactions/suggest-categories/openapi.json
- Other endpoints in **transactions**: https://www.ondayzero.com/docs/reference/transactions