> For the complete documentation index, see [llms.txt](https://docs.exads.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.exads.com/api/ad-placement-api/ad-plac-error-examples.md).

# Error Examples

## Zone ID not recognised

In the example below, ads are requested for multiple zones and errors are returned for some zones. The zone ID was not found for two of them.

### Request: JSON <a href="#request-json" id="request-json"></a>

```json
{
    "user": {
        "ip": "179.127.135.233",
        "ua": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:81.0) Gecko/20100101 Firefox/81.0"
    },
    "zones": [
        {
            "id": 123
        },
        {
            "id": 213
        },
        {
            "id": 312
        }   
    ]
}
```

### Response: JSON <a href="#response-json" id="response-json"></a>

```json
{
    "zones": [
        null,
        {
            "idzone": 2,
            "type": "banner",
            "data": {
                "url": "https://main.example.com/click.php?data=H4sIAAAAAAAAA0WPO27DQAxEr.LG7YK__bBMk8ZFzrArrZAiQQLYgFzM4UNZRUCCIMjhw_ACI69SHNYIn4_H7_2qb1d5j9z3Pc1nX.9p.fkGQAAXUvGj4n_D1RNLTaw5iSpgVoQbcbCV2CsytZgyNACBCZASPSUTOAIsSQ1qlFsOVWXeNKDDZ1cuS56j5o1Gtz7K1BonhPHVI09nB_GC1_gMtcwcTl4dHd8dIqdT2k6h4eOG5kK1.7Kts.ncyuijs64unlerZf4BvX2zxCABAAA-",
                "impression": "https://syndication.example.com/cimp.php?t=imp&api=1&data=H4sIAAAAAAAAAzVPSW4DMQz7Sj8wBrV5ya1FX9CiD7An9qlFD73MQY+PkmlEG5ZMwqQZjI2wMb0QLpovKk6lJeKSSCyxiL99vLqSz6Nf/9L+++MqrFKeRy3aqrlCQK24oUbfCufmqpmpgpyyiyMgCqsWr8WQtHqBf32+P3aonF2Agw3R320pRJyQyBtc4xJHUJxEvRAtiaijzS6Ud5uj2MLo2keekevuMb57rEdonEj4p54QNaL45UbngHvwKPiDjqqnPPKpwstqmHNera9OZe053DCHrdGXGPUbbttiKlIBAAA=",
                "image": "https://static.example.com/library/432437/42ec0144a74a1663f2973ad3070234f8e5633855.jpg"
            }
        },
        null
    ],
    "errors": {
        "0": [
            "Zone 1 not found"
        ],
        "2": [
            "Zone 3 not found"
        ]
    }
}
```

## Zone contains unacceptable field <a href="#zone-contains-unacceptable-field" id="zone-contains-unacceptable-field"></a>

In this example, the request contains the unacceptable field `testing`.

### Request: JSON <a href="#request-json-1" id="request-json-1"></a>

```json
{
    "user": {
        "ip": "179.127.135.233",
        "ua": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:81.0) Gecko/20100101 Firefox/81.0",
    },
    "zones": [
        {
            "id": 1,
            "testing": false
        }
    ]
}
```

### Response: JSON <a href="#response-json-1" id="response-json-1"></a>

```json
{
    "errors": [
        {
            "[zones][0][testing]": "This field was not expected."
        }
    ]
}
```

## Required field missing and incorrect field added <a href="#required-field-missing-and-incorrect-field-added" id="required-field-missing-and-incorrect-field-added"></a>

In this example, the request is missing the required field `IP`, and contains the unacceptable field `testing`.

### Request: JSON <a href="#request-json-2" id="request-json-2"></a>

```json
{
    "user": {
        "ua": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:81.0) Gecko/20100101 Firefox/81.0",
        "testing": false
    },
    "zones": [
        {
            "id": 2
        }
    ]
}
```

### Response: JSON <a href="#response-json-2" id="response-json-2"></a>

```json
{
    "errors": [
        {
            "[user][ip]": "This field is missing."
        },
        {
            "[user][testing]": "This field was not expected."
        }
    ]
}

```


---

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