# PATCH /api/v1/credit/cards/{card_id}/limits

> Update card spend controls

- **Tag:** credit
- **Operation ID:** `update_card_limits_api_v1_credit_cards__card_id__limits_patch`

## Description

Change a card's ceiling, interval, or category rules.

## Authentication

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

## Parameters

- `card_id` (path, string, required)

## Request body

Schema: `CardLimitUpdateRequest`

- `spend_limit_cents` (integer)
- `spend_interval` (string)
- `transaction_limit_cents` (integer)
- `allowed_mcc_codes` (array · string)
- `blocked_mcc_codes` (array · string)
- `auto_lock_date` (string · date)
- `display_name` (string)

## Responses

### 200 — Successful Response

Schema: `SuccessEnvelope_IssuedCardResponse_`

- `success` (boolean)
- `message` (string)
- `code` (string)
- `data` (IssuedCardResponse)

### 400 — Bad Request - Invalid input

### 401 — Unauthorized - Authentication required

### 403 — Forbidden - Insufficient permissions

### 404 — Not Found - Resource does not exist

### 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 PATCH 'https://api.ondayzero.com/api/v1/credit/cards/{card_id}/limits' \
  -H 'Authorization: Bearer dz_your_token' \
  -H 'x-business-id: YOUR_BUSINESS_ID' \
  -H 'Content-Type: application/json' \
  -d '{
  "spend_limit_cents": 0,
  "spend_interval": "string",
  "transaction_limit_cents": 0,
  "allowed_mcc_codes": [],
  "blocked_mcc_codes": [],
  "auto_lock_date": "2026-01-01"
}'
```

### JavaScript

```javascript
const response = await fetch('https://api.ondayzero.com/api/v1/credit/cards/{card_id}/limits', {
  method: 'PATCH',
  headers: {
    Authorization: 'Bearer dz_your_token',
    'x-business-id': 'YOUR_BUSINESS_ID',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
  "spend_limit_cents": 0,
  "spend_interval": "string",
  "transaction_limit_cents": 0,
  "allowed_mcc_codes": [],
  "blocked_mcc_codes": [],
  "auto_lock_date": "2026-01-01"
}),
});
const data = await response.json();
```

### Python

```python
import httpx

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

payload = {
  "spend_limit_cents": 0,
  "spend_interval": "string",
  "transaction_limit_cents": 0,
  "allowed_mcc_codes": [],
  "blocked_mcc_codes": [],
  "auto_lock_date": "2026-01-01"
}

response = httpx.patch("https://api.ondayzero.com/api/v1/credit/cards/{card_id}/limits", headers=headers, json=payload)
data = response.json()
```

## See also

- HTML version: https://www.ondayzero.com/docs/reference/credit/update-card-limits
- OpenAPI slice: https://www.ondayzero.com/docs/reference/credit/update-card-limits/openapi.json
- Other endpoints in **credit**: https://www.ondayzero.com/docs/reference/credit