> For the complete documentation index, see [llms.txt](https://wiki.mobivate.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.mobivate.com/use-cases/send-silent-obs-billing-message-example.md).
# Send Silent OBS Billing Message Example
### `GET` `/srs/api/sendsms`
Send a silent OBS billing message and charge your end-user for it.
{% hint style="warning" %}
This may not be available due to network regulations. For example, MTN hand their own billing requests.
{% endhint %}
{% tabs %}
{% tab title="Curl" %}
```hsts
curl -XGET -H "Content-type: application/json" 'https://hostname/srs/api/sendsms?USER_NAME=&PASSWORD=&ORIGINATOR=&RECIPIENT=&PR OVIDER=&VALUE=&KEYWORD=&MESSAGE_TEXT=SILENT%20BILLING%20MESSAGE'
```
{% endtab %}
{% tab title="Python" %}
```python
import requests
headers = {
'Content-type': 'application/json',
}
response = requests.get(
'https://hostname/srs/api/sendsms?USER_NAME=&PASSWORD=&ORIGINATOR=&RECIPIENT=&PR OVIDER=&VALUE=&KEYWORD=&MESSAGE_TEXT=SILENT%20BILLING%20MESSAGE',
headers=headers,
)
```
{% endtab %}
{% endtabs %}
**Headers**
| Name | Value |
| ------------- | ------------------ |
| Content-Type | `application/json` |
| Authorization | `No Auth` |
**Body**
| Parameter | Type | Example | Description |
| ------------- | ------- | -------------------------------- | ------------------------------------------------------------- |
| account\_id | string | 43e36f50aaf111e272639171000000a9 | Your unique Mobivate account id. |
| password | string | 3b41d767316541bacef19d1382ac1e12 | Your unique associated Mobivate account api-key. |
| originator | integer | 12345 | The associated shortcode for your service. |
| recipient | integer | XX7432104492 | The recipient you want to send this message to. |
| provider | string | Safaricom | The network you plan to send the SMS message via. |
| keyword | string | mv-100620006 | Your unique Mobivate keyword for your service. |
| message\_text | string | SILENT%20BILLING%20MESSAGE | Should be Silent Billing Message, end user will not see this. |
| value | integer | 10 | The cost of receiving this SMS message. |
**Response**
{% tabs %}
{% tab title="200" %}
```json
{
"MT-aabbccddeeff00112233445566778899"
}
```
{% endtab %}
{% tab title="511" %}
```json
{
"error": "Username or Password incorrect"
}
```
{% endtab %}
{% endtabs %}
---
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