When talking about plug-ins, both KonText documentation and source code use two similar terms which must be clarified first:

• PluginApi is a proxy object providing access to functions related to a currently processed request/action. It is typically passed as the first argument of plug-in interface methods.
• Plug-in interface is an interface of a specific plug-in type (sessions, db, taghelper,...).

The PluginApi is instantiated "per request".

• set_shared(key, value)
• get_shared(key, default=None)
• get_from_environ(key, default=None)
• redirect(url, code=303)
• cookies
• session
• refresh_session_id()
• user_lang
• user_id
• user_is_anonymous
• current_corpus
• get_canonical_corpname(c)
• current_url
• root_url
• text_types

• application_bar
• auth
• chart_export
• conc_cache
• conc_persistence
• corparch
• db
• export
• footer_bar
• getlang
• issue_reporting 🆕
• live_attributes
• locking
• menu_items
• query_storage
• sessions
• settings_storage
• subcmixer
• subc_restore
• syntax_viewer
• taghelper
• token_detail 🆕
• user_items