> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://developers.brevo.com/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://developers.brevo.com/_mcp/server.

# New parameters for transactional SMS messages

**Route:** [https://developers.sendinblue.com/reference/sendtransacsms](https://developers.sendinblue.com/reference/sendtransacsms)\
For the Transactional SMS route, `organisationPrefix` is now added, which will be used as prefix within\
the message content. This field is only mandatory for U.S. Carriers. **+1 Country Code**

```json
{
	"sender":"Tester",
	"recipient":"+18448614669432",
	"content":"Hello, This is the Test message.. from beta.",
	"type":"transactional",
  "organisationPrefix":"Sendinblue"
}
```

**Route:** [https://developers.sendinblue.com/reference/createsmscampaign-1](https://developers.sendinblue.com/reference/createsmscampaign-1)\
**Route:** [https://developers.sendinblue.com/reference/updatesmscampaign-1](https://developers.sendinblue.com/reference/updatesmscampaign-1)\
For POST sms campaign creation and PUT sms campaign update, **organisationField** and **unsubscribeInstruction** are required for U.S Carriers.These two field are optional for others.\
**organisationPrefix** - Brand name or organisation Name eg- sendinblue\
**unsubscribeInstruction**- Instruction to unsubscribe from sms campaigns. Must have **STOP** keyword,

```json
{
    "name":"Test Campaign",
	"sender":"Tester",
	"content":"This is Test sms camp",
	"recipients":{
		"listIds":[2],
		"exclusionListIds":[]
	},
    "organisationPrefix":"Sendinblue",
    "unsubscribeInstruction":"send STOP to unsubscribe campaign"
}
```