---
title: v4.2.557 (2026-02-13) - Desktop API Changelog - Beeper Developer Docs
---

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[ All versions](/desktop-api/changelog/index.md)

## Version v4.2.557 (2026-02-13) Latest

### Added

- **Desktop API discovery** - New [`GET /v1/info`](/desktop-api-reference/resources/info/methods/retrieve/index.md) endpoint provides app metadata, runtime info, and endpoint discovery for the running Desktop API server.

- **WebSocket events** - New live events endpoint at [`GET /v1/ws`](/desktop-api/websocket-experimental/index.md) with per-chat subscriptions via `subscriptions.set`.

- **Message reactions** - New message reaction endpoints:

  - [`POST /v1/chats/{chatID}/messages/{messageID}/reactions`](/desktop-api-reference/resources/chats/subresources/messages/subresources/reactions/methods/add/index.md)
  - [`DELETE /v1/chats/{chatID}/messages/{messageID}/reactions`](/desktop-api-reference/resources/chats/subresources/messages/subresources/reactions/methods/delete/index.md)

- **Token introspection** - New [`POST /oauth/introspect`](/desktop-api/auth#desktop-api-discovery-and-introspection/index.md) endpoint uses `application/x-www-form-urlencoded` and returns active/inactive token metadata.

- **Contacts list** - New [`GET /v1/accounts/{accountID}/contacts/list`](/desktop-api-reference/resources/accounts/subresources/contacts/methods/list/index.md) endpoint for cursor-based merged contact listing.

### Changed

- **Chat creation behavior** - [`POST /v1/chats`](/desktop-api-reference/resources/chats/methods/create/index.md) now supports `mode=start` to create or resolve direct chats from merged contact data and returns `status=existing|created` in that mode.
- **Account schema** - `network` is no longer returned from `Account`; use `accountID` plus `user` and contact/query behavior instead.