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# Send an SMS

> Sends a text message from one of your mobile numbers to a phone number. Input schema, a tools/call example and an example result.

Source: https://cotlet.dev/docs/mcp/ringover/send_sms

Docs sections: [Get started](https://cotlet.dev/docs.md) · [REST API](https://cotlet.dev/docs/api.md) · [MCP](https://cotlet.dev/docs/mcp.md) · [SDKs & CLI](https://cotlet.dev/docs/sdks.md) · [Integrations](https://cotlet.dev/docs/integrations.md)

Sends a text message from one of your mobile numbers to a phone number.

Ringover MCP tools: https://cotlet.dev/docs/mcp/ringover.md

MCP tool: `ringover_write → send_sms`

Access: write. Confirm: waits for the user's OK before it runs.

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 | Required | Description |
|---|---|---|---|
| `from_number` | string | yes | A mobile number assigned to your user, the sender ID, with country code. |
| `to_number` | string | yes | The recipient phone number with country code. |
| `body` | string | yes | The message text. |
| `send_at` | datetime | no | ISO 8601 time to send later. Omit to send now. |

## tools/call

```json
{
  "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

```json
{
  "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
}
```

Previous: [Remove a tag from a call](https://cotlet.dev/docs/mcp/ringover/remove_call_tag.md)

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