---
title: "single_simple_send"
method: POST
path: "/streams/simple_send_single"
tags: ["Streams Service"]
---

# single_simple_send

`POST /streams/simple_send_single`

Send a single SMS message in one request. The body is a flat object — ideal for transactional, one-off messages. For high volume, use `simple_send` to batch up to 250 messages per call.

Set a unique `internal_id` to correlate the message with delivery webhooks. The response returns a `task_id` and the assigned `message_uuid`/`conversation_uuid`.

**Authentication:** stream token in the `Authorization` header (see **Authentication** in the API Overview).

## Request body

- object
  - `internal_id` string — Your identifier for the message. Echoed back in responses and delivery webhooks.
  - `sender` string — Sender ID or phone number. Falls back to the stream default when omitted.
  - `recipient_phone` string — Recipient phone number in international format, digits only.
  - `message_content` string, required — The text body of the SMS message.

## Response `200`

The message was accepted for delivery.

- object
  - `status` boolean — `true` when the batch was accepted. Individual messages may still carry an `error`.
  - `task_id` string — Identifier for the accepted batch (processed asynchronously).
  - `messages` object[] — One entry per submitted message, in request order.
    - `internal_id` string — The `internal_id` you supplied, echoed back.
    - `message_uuid` string — Platform-assigned unique identifier for the message.
    - `conversation_uuid` string — The conversation this message belongs to.
    - `error` string — Present only when this message failed: the hex error code (e.g. `0x31`). See Error handling in the Overview.
    - `details` string — Human-readable detail for a failed message.

---

[API](https://skmtc.net/commpeak/apis/dialer-api-v2-0-1.md) · [All operations](https://skmtc.net/commpeak/apis/dialer-api-v2-0-1/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/commpeak/dialer-api-v2-0-1/versions/eacecf960bb6/schema)