Client announcement & version control

Other Settings has two JSON fields for talking to your dedicated client apps (such as Siu) directly, outside of WHMCS:

• Client Announcement
• Version Control

Both are served publicly (no login required) through v2raysocks_client.php, using the X-User-Act request header:

X-User-Act value	Returns
getclientannouncement	The Client Announcement JSON
getversioncontrol	The Version Control JSON

Leave either field empty to disable it.

Client Announcement

Shown to the user when the client app starts. Suggested shape:

{
  "id": "announcement-20260517-001",
  "message": {
    "chinese": "客户端维护通知：我们将在今晚 23:00 进行短暂维护。",
    "english": "Client maintenance notice: we'll perform brief maintenance tonight at 23:00.",
    "russian": "Уведомление о техническом обслуживании клиента: сегодня в 23:00 мы проведем краткое обслуживание."
  },
  "notify_times": 1
}

• id — unique identifier for this announcement. Change it whenever the content changes, so clients that already dismissed the previous announcement show the new one.
• message — the announcement text, keyed by language.
• notify_times — how many times the client should show it to a given user.

Version Control

Lets a client app check whether it's outdated or blocked from running. Suggested shape:

{
  "min_version": "1.0.0",
  "latest_version": "1.2.0",
  "download_url": "https://example.com/downloads"
}

• min_version — the oldest client version still allowed to run.
• latest_version — the current version, for "update available" prompts.
• download_url — where the client should send users to update.

These two fields aren't validated against a fixed schema server-side — they're passed straight through as-is, so the exact shape only needs to match what your client app parses. The examples above are the shape this feature was introduced for; check your client's own documentation before relying on them.