> For the complete documentation index, see [llms.txt](https://wiki.mobivatebulksms.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.mobivatebulksms.com/archived-docs/send-batch-sms-messages/understanding-batch-sms-response-codes.md).

# Understanding Batch SMS Response Codes

### Responses

We use conventional HTTP response codes to indicate the success or failure of an API request. In general:

**2xx** indicate success.\
**4xx** indicate an error that failed given the information provided (e.g., a required parameter was omitted).\
**5xx** errors indicate an error with ours servers (these are rare).

### Sample Success Response

Upon a successful send request, our server will respond with a 200 (success) HTTP response code, and respond with campaign json.

```json
{
   "id":"fd9157b74bd3475d8716a69683066f0f",
   "name":null,
   "routeId":"mglobal",
   "shortenUrls":false,
   "spreadHours":0,
   "excludeOptouts":true,
   "excludeDuplicates":false,
   "scheduleDateTime":null,
   "recipients":[
      {
         "originator":"Brand",
         "recipient":"440000001",
         "text":"Test Message",
         "reference":"ref-001",
         "routeId":null
      }
   ]
}
```

### Sample Error Response

```json
{
   "code":401,
   "message":"Unauthorized"
}
```

### Response Codes

{% hint style="info" %}
To see a full list of our **Response codes**, please [click here](/overview/introduction/understanding-response-codes.md)
{% endhint %}


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