> ## Documentation Index
> Fetch the complete documentation index at: https://docs.usenumero.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Cardholder's Cards

> List all cards belonging to a cardholder.

Returns every card issued to a single cardholder.

> Card endpoints use the same base URL and API key as the rest of the API, and are signature-gated:
> send `X-Numero-Signature` and `X-Numero-Signature-Version: v2` as well. See [Request signing](/03-request-signing).

## Endpoint

```
GET /api/v1/business/cardholders/{customerId}/cards
```

**Signature required:** Yes

## Headers

| Header                       | Required | Description                                                                                                                                                                    |
| ---------------------------- | -------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `X-Numero-Api-Key`           | Yes      | Your API key                                                                                                                                                                   |
| `X-Numero-Signature`         | Yes      | Base64 HMAC-SHA256 over the exact raw request body (POST) or the canonicalised query string (GET), keyed with your **Public Key**. See [Request signing](/03-request-signing). |
| `X-Numero-Signature-Version` | Yes      | Always `v2`.                                                                                                                                                                   |

## Path parameters

| Parameter    | Type   | Required | Description       |
| ------------ | ------ | -------- | ----------------- |
| `customerId` | string | Yes      | The cardholder id |

## Request example

```bash theme={null}
curl -X GET "https://api.usenumero.com/numeroaccount/api/v1/business/cardholders/NCUS9953596C2B7F45/cards" \
  -H "X-Numero-Api-Key: your_api_key" \
  -H "X-Numero-Signature: $SIGNATURE" \
  -H "X-Numero-Signature-Version: v2"
```

## Response

```json theme={null}
{
  "data": [
    {
      "cardReference": "NCRD24AD18BEBD474A",
      "customerId": "NCUS9953596C2B7F45",
      "label": "Ads spend",
      "brand": "Visa",
      "firstSix": "428852",
      "lastFour": "6353",
      "expiryMonth": "06",
      "expiryYear": "2029",
      "currency": "USD",
      "balance": 25.0,
      "status": "Active",
      "isPhysical": false,
      "dailyLimit": 5000,
      "perTransactionLimit": 1000,
      "issuedAt": "2026-06-16T12:00:00Z",
      "capabilities": [
        "USD",
        "APPLE_PAY",
        "GOOGLE_PAY"
      ]
    }
  ],
  "error": null,
  "meta": {
    "request_id": "req_365123ebc73323f1482508560ce6400e",
    "pagination": null
  }
}
```