Send an SMS
Sends a text message from one of your mobile numbers to a phone number.
MCP tool ringover_write → send_sms
write Confirm
Sends the SMS as the Message > SMS > + New form does: from a mobile number assigned to your user, to a phone number, with your text. Ringover splits the text into 160-character fragments, bills each fragment and allows at most 8 segments. Needs a Business plan. With send_at the message is scheduled instead of sent now. It returns the message with its state; a failed message can be sent again. By default you confirm each call; you can switch that off for this tool.
Parameters
| Name | Type | Description |
|---|---|---|
| from_number string required | string | A mobile number assigned to your user, the sender ID, with country code. |
| to_number string required | string | The recipient phone number with country code. |
| body string required | string | The message text. |
| send_at datetime | datetime | ISO 8601 time to send later. Omit to send now. |
tools/call
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/call",
"params": {
"name": "ringover_write",
"arguments": {
"operation": "send_sms",
"arguments": {
"from_number": "+15550100100",
"to_number": "+15550100142",
"body": "Hi Dana, sorry we missed your call. We will call you back today."
}
}
}
}Example response
{
"content": [
{
"type": "text",
"text": "{ ... same JSON as structuredContent ... }"
}
],
"structuredContent": {
"message_id": "msg_7710",
"conversation_id": "sms_3301",
"from_number": "+15550100100",
"to_number": "+15550100142",
"body": "Hi Dana, sorry we missed your call. We will call you back today.",
"state": "sent",
"sent_at": "2026-10-22T09:40:00Z"
},
"isError": false
}