Jump to main content Jump to doc navigation

You can typically use any parameters you'd like when creating custom manager pages or other integrations, but there are a couple of exceptions.

Reserved parameters in the manager

The following parameters are used by the manager for various purposes.

  • a – used to define an action or controller
  • namespace - indicates what namespace the action belongs to; when not specified defaults to core
  • context_key – specifies one of your contexts (e.g. "web" or "mgr")
  • wctx - specifies the "working context" which is the context the current "thing" belongs to, rather than the context "mgr".
  • class_key – specifies a class name, e.g. when creating a Weblink or static resource
  • id - specifies the ID a certain action or controller defaults to.

Reserved parameters in the front-end

  • q - used when friendly URLs are enabled for routing a request to the right resource. Can be changed with the request_param_alias system setting, but recommended to leave unchanged.
  • id - used when friendly URLs are disabled for fetching the current resource. Can be changed with the request_param_id system setting, but recommended to leave unchanged.

Reserved $_SESSION variables

  • cultureKey
  • all parameters prefixed with modx.

Support the team building MODX with a monthly donation.

The budget raised through OpenCollective is transparent, including payouts, and any contributor can apply to be paid for their work on MODX.


  • modmore
  • Jens Wittmann – Gestaltung & Entwicklung
  • Fabian Christen
  • Digital Penguin
  • Dannevang Digital
  • Sepia River Studios
  • Chris Fickling
  • CrewMark
  • deJaya
  • Following Sea
  • Anton Tarasov
  • eydolan
  • Raffy
  • Lefthandmedia
  • Murray Wood
  • Snow Creative
  • Nick Clark
  • Helen
  • JT Skaggs
  • krisznet
  • YJ
  • Yanni
  • Richard


$370 per month—let's make that $500!

Learn more