> For the complete documentation index, see [llms.txt](https://postman-v2.guides.gov.sg/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://postman-v2.guides.gov.sg/endpoints-for-api-users/batch-send.md).

# Batch Send

{% hint style="danger" %}
[Postman test site](https://test.postman.gov.sg/login) has a .csv file limit of 20 rows to ensure no load testing is done on this site. More information [here](https://cal.gov.sg/n2g21zn65d6nr2pd80cd051p) on load testing.
{% endhint %}

Sends multiple messages in a single API request.

You will need to prepare a CSV file where, in addition to recipient and language, each column represents a value to the campaign’s template parameter.

{% code title="Example CSV File" overflow="wrap" %}

```
recipient,language,recipient_name,topic
6599999999,english,Emily Yeo,passport application #12345F
6599999998,chinese,James Tan,passport application #67890A
```

{% endcode %}

You will then need to upload this file to this endpoint.

To upload your file, send a `multipart/form-data` request to this endpoint.

{% code title="Endpoint #4" %}

```sh
POST /campaigns/:campaignId/batch/messages
```

{% endcode %}

If your client code is written in JavaScript, consider using a `FormData` object to contain your file ([MDN Web API docs](https://developer.mozilla.org/en-US/docs/Web/API/FormData/Using_FormData_Objects)).

{% code title="Example JavaScript code" overflow="wrap" %}

```javascript
// Assuming you have a constant or variable named "file" which is a File object:

const formData = new FormData();
formData.append("file", file);

const request = new XMLHttpRequest();
request.setRequestHeader("Authorization", "Bearer " + YOUR_API_KEY);
request.open(
  "POST",
  "https://<POSTMAN_V2_API_BASE_URL>/api/v2/campaigns/<YOUR_CAMPAIGN_ID>/batch/messages"
);

request.send(formData);
```

{% endcode %}

{% code title="Response Body" %}

```json
{
    "isValid": true,
    "batchId": "<YOUR_BATCH_ID>"
}
```

{% endcode %}


---

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