generated: '2026-10-08'
method: searched
source: https://developers.sinch.com/docs/conversation/release-notes.md (dated entries; RSS at https://developers.sinch.com/feed/rss.xml);
  https://developers.sinch.com/docs/number-lookup-api-v2/release-notes.md; voice, est and provisioning-api release-notes pages
  read and found undated (voice last entry 2022-10-06; est "Previous years"; provisioning grouped by channel)
name: Sinch API release notes
description: Sinch publishes per-product release notes on the developer portal, dated by day, with an RSS feed. The Conversation
  API notes are the most active (eight entries June-October 2026, plus an announced December 2026 removal); the Voice API
  notes end in 2022 and the Elastic SIP Trunking page carries only "Previous years". Recent window only; the live pages are
  the source of truth.
scheme: dated release notes per product (YYYY-MM-DD headings); no global API version number
rss: https://developers.sinch.com/feed/rss.xml
pages:
  Conversation API: https://developers.sinch.com/docs/conversation/release-notes
  Provisioning API: https://developers.sinch.com/docs/provisioning-api/release-notes
  Voice API: https://developers.sinch.com/docs/voice/release-notes
  Elastic SIP Trunking: https://developers.sinch.com/docs/est/release-notes
  Number Lookup API: https://developers.sinch.com/docs/number-lookup-api-v2/release-notes
entries:
- version: 2026-12-16 (Upcoming change)
  date: '2026-12-16'
  api: Conversation API
  breaking: true
  highlights:
  - The `v1alpha` and `v1beta` Batch API endpoints have been deprecated. Beginning December 16, 2026, they will no longer
    be accessible. **This removal should not impact most users** as the `v1alpha` and `v1beta` endpoints w
- version: '2026-10-02'
  date: '2026-10-02'
  api: Conversation API
  breaking: false
  highlights:
  - Conversation API has added support for sending **contextual replies** to contacts on the WhatsApp channel. Include the
    `reply_to` field in the [API call to the Send Message endpoint](/docs/conversation/api-reference/conv
- version: '2026-08-19'
  date: '2026-08-19'
  api: Conversation API
  breaking: false
  highlights:
  - 'Added support for [Webhook routing](/docs/conversation/callbacks/webhook-routing), which is currently available for open
    beta usage. This feature allows you to define fine-grained rules that determine where Conversation '
- version: '2026-07-15'
  date: '2026-07-15'
  api: Conversation API
  breaking: false
  highlights:
  - The `nrs_data` field was added to the structure of various callback payloads. This change was originally planned to be
    released on 2026-07-08, but it was delayed to 2026-07-15.
- version: '2026-06-26'
  date: '2026-06-26'
  api: Conversation API
  breaking: false
  highlights:
  - A bug that affected the SMS configuration flow on the Sinch Build Dashboard has been fixed. The issue previously affected
    the process of configuring SMS credentials on newly created Conversation API apps. Only the config
- version: '2026-06-24'
  date: '2026-06-24'
  api: Conversation API
  breaking: false
  highlights:
  - A helper feature has been added to the SMS channel credentials update flow. This back-end feature addition prevents unwanted
    credential changes when masked SMS credentials are included in update calls made to Conversatio
- version: '2026-06-23'
  date: '2026-06-23'
  api: Conversation API
  breaking: false
  highlights:
  - Conversation API has added support for sending **typing indicators** and **read receipts** to contacts on the WhatsApp
    channel. Send a `composing_event` (typing indicator) or the new `read_message_event` (mark as read) a
- version: '2026-06-10'
  date: '2026-06-10'
  api: Conversation API
  breaking: false
  highlights:
  - To ensure the highest level of service reliability and to optimize communication efficiency across our ecosystem, we are
    performing an infrastructure upgrade to the Conversation API on June 18, 2026.
- version: '2024-12-14'
  date: '2024-12-14'
  api: Number Lookup API v2
  breaking: false
  highlights:
  - Release line type identification worldwide, including properties of carrier name, line type, MCC/MNC, porting information