Document WebSocket rate limiter env variables

[AlexGaillard]

Documents the new WebSocket rate-limiter environment variables introduced in directus/directus#28106.

The WebSocket rate limiter now has its own config group instead of reusing the main RATE_LIMITER_* values with a hardcoded key prefix. On shared-Redis setups (one Redis instance, multiple projects, ACLs scoped by key prefix), the old hardcoded WebSocket prefix blocked a project from accessing its own limiter keys. The new variables let the prefix be overridden per project.

Added to the Rate Limiting section

• RATE_LIMITER_WEBSOCKETS_POINTS (default 50)
• RATE_LIMITER_WEBSOCKETS_DURATION (default 1)
• RATE_LIMITER_WEBSOCKETS_KEY_PREFIX (default websocket)

Also noted in prose:

• WebSocket rate limiting is still toggled by the existing RATE_LIMITER_ENABLED flag (no separate enable flag).
• Store and Redis connection are shared with the main rate limiter (RATE_LIMITER_STORE, REDIS).
• Defaults (50 points / 1s) match the previous built-in behavior, so existing setups are unaffected unless the new variables are set.

Ref: directus/directus#28106

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Project	Deployment	Actions	Updated (UTC)
docs	Ready	Preview	Aug 14, 2026 8:08pm