> ## Documentation Index
> Fetch the complete documentation index at: https://developers.phonovation.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Phonovation SMS API changelog

> Release notes and platform updates for the Phonovation SMS API.

The Phonovation SMS API launches on 1 September 2026.

<Update
  label="1 September 2026"
  description="Phonovation SMS API launch"
  tags={["Launch"]}
  rss={{
title: "Phonovation SMS API launch",
description: "The Phonovation SMS API launches on 1 September 2026 with campaign sending, delivery tracking, signed webhooks, and developer tooling."
}}
>
  ## Phonovation SMS API launches

  The launch provides the core APIs and tools needed to send SMS messages and track their delivery.

  ### Core features

  * **Bearer authentication.** Use a Personal Access Token for server-to-server integrations or OAuth when you need an access-token and refresh-token lifecycle. See [Authentication](/phonovation-api/authentication).
  * **Service health checks.** Confirm that the API is available before starting a sending workflow.
  * **Campaign sending and scheduling.** Send immediately or schedule campaigns using Irish local time, with recipients supplied in full international format. See [Sending SMS](/phonovation-api/sending-sms).
  * **Campaign delivery totals.** Retrieve sent, delivered, undelivered, and pending totals using the campaign UUID returned when a request is accepted.
  * **Recipient-level correlation.** Attach a [Client Reference](/phonovation-api/client-reference) to each recipient and receive it unchanged in the delivery webhook.
  * **Signed delivery webhooks.** Receive delivery updates with HMAC-SHA256 signatures, transient-failure retries, and guidance for handling duplicate deliveries. See [Webhooks](/phonovation-api/webhooks).
  * **Sender ID support.** Use account-assigned Sender IDs with guidance for ComReg registration, long codes, and international delivery. See [Sender IDs](/phonovation-api/sender-ids).
  * **Developer tooling.** Build with the interactive API Reference, downloadable OpenAPI specification, end-to-end quickstart, [MCP server](/phonovation-api/tools/mcp), and [SMS Message Lab](/phonovation-api/tools/message-lab).
</Update>