mcpServers
A Claude Code settings key, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.
What it is
An MCP server literally named __proto__ now warns you instead of silently loading nothing.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.219.
Presence across releases
The miner has never read a build containing this name. It is here because a changelog entry of ours names it, which is evidence that it existed and not evidence of which releases carried it. The inventory starts at v2.1.138 and everything older than that was never mined.
Changelog entries naming it
-
v2.1.219"__proto__" rejected as an MCP server name
An MCP server literally named __proto__ now warns you instead of silently loading nothing.
named in this entry
Documentation pages
- mcp-connector mentions it Claude Developer Platform
- deploy-helm mentions it Claude Developer Platform
- overview mentions it Claude Developer Platform
- remote-mcp-servers mentions it Claude Developer Platform
- environments mentions it Claude Developer Platform
- github mentions it Claude Developer Platform
- mcp-connector mentions it Claude Developer Platform
- migration mentions it Claude Developer Platform
- multiagent-orchestration mentions it Claude Developer Platform
- permission-policies mentions it Claude Developer Platform
- session-operations mentions it Claude Developer Platform
- Set up Claude Code for your organization 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.