extraKnownMarketplaces

A Claude Code settings key, read out of the shipped bundle. It has been in the build since v2.1.138, including the newest one read.

What it is

Presence across releases

A row reading never mined is a release with no archived bundle behind it. Nothing was read out of it, so nothing here says whether the name was in it. A declared type or a default is only ever what that release's own bundle stated.

Changelog entries naming it

1. v2.1.238Managed settings can refuse plugin sources and marketplace updates

   Admins can block plugins and marketplaces from unlisted sources, with refusals naming the policy.

   named in this entry

2. v2.1.232additionalMarketplaces settings alias

   additionalMarketplaces now works as an alias for extraKnownMarketplaces in settings files.

   named in this entry

3. v2.1.232Two new spellings for the marketplace settings keys

   You can now write additionalMarketplaces and allowedMarketplaces as aliases for the older marketplace settings keys.

   named in this entry

4. v2.1.228extraKnownMarketplaces merges instead of being replaced

   extraKnownMarketplaces now merges across settings files instead of one layer wiping the others.

   named in this entry

5. v2.1.224Invalid extraKnownMarketplaces entries are dropped with a warning

   Bad marketplace entries in your settings are now removed and reported as warnings instead of silently accepted.

   named in this entry

6. v2.1.223Marketplace policy lists accept an owner wildcard

   You can block or allow every repo under one owner with a single owner/* marketplace entry.

   named in this entry

7. v2.1.222Resume snapshots carry user settings without plugin keys

   Resumed sessions now carry your settings files along, with plugin registrations stripped out.

   named in this entry

Documentation pages

• Claude Code settings reference reference table Claude Code CLI
• Persist sessions to external storage mentions it Claude Code CLI
• Claude Code changelog mentions it Claude Code CLI
• Discover and install prebuilt plugins through marketplaces mentions it Claude Code CLI
• Error reference mentions it Claude Code CLI
• Claude Code with GitHub Enterprise Server mentions it Claude Code CLI
• Deploy managed settings mentions it Claude Code CLI
• Configure permissions mentions it Claude Code CLI
• Create and distribute a plugin marketplace mentions it Claude Code CLI
• Recommend plugins for your org mentions it Claude Code CLI
• Claude Code settings mentions it Claude Code CLI
• Example settings files mentions it Claude Code CLI
• Extend Claude with skills mentions it Claude Code CLI

A reference table page is one whose own table defines this name, and it is where the description above came from. A page that mentions it carries the name somewhere in its text and may say nothing about it at all. Every page carrying it.

Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the settings key does. All settings keys.