CLAUDE_IN_CHROME_MANAGED_MCP_REFUSAL

Updated October 14, 2026 by Alex Sorokoletov

CLAUDE_IN_CHROME_MANAGED_MCP_REFUSAL is a Claude Code environment variable. Added between v2.1.269 and v2.1.283 and still present in v2.1.295. It is not in the official reference.

Status	Present in v2.1.295
Added	Added between v2.1.269 and v2.1.283
Category	MCP
Official docs	Not listed

How to set it

For one session, export it in the shell that starts Claude Code:

export CLAUDE_IN_CHROME_MANAGED_MCP_REFUSAL=<value>
claude

To apply it to every session, add it to the env object of a settings file:

// ~/.claude/settings.json
{
  "env": {
    "CLAUDE_IN_CHROME_MANAGED_MCP_REFUSAL": "<value>"
  }
}

Related variables

CLAUDE_CODE_CHROME_MCP_ORG_DENIED
CLAUDE_IN_CHROME_MCP_SERVER_NAME
CLAUDE_CODE_ENABLE_REFRESH_MCP_TOOLS: Enables an on-demand MCP-tool refresh capability, grouped with CLAUDE_CODE_ENABLE_TASKS and CLAUDE_CODE_ENABLE_REMOTE_RECAP.
CLAUDE_CODE_MAX_MCP_DESCRIPTION_LENGTH
CLAUDE_CODE_MCP_ALLOWLIST_ENV: Specifies an allowlist of environment variables that MCP servers can access.
CLAUDE_CODE_MCP_AUTO_BACKGROUND_MS
CLAUDE_CODE_MCP_INSTR_DELTA: Delta/incremental MCP instruction updates.
CLAUDE_CODE_MCP_SERVER_NAME: Added in v2.1.85 to identify which MCP server a helper process was acting on behalf of.

Frequently asked questions

Which Claude Code version has CLAUDE_IN_CHROME_MANAGED_MCP_REFUSAL?

Added between v2.1.269 and v2.1.283 and still present in v2.1.295.

How do I set CLAUDE_IN_CHROME_MANAGED_MCP_REFUSAL?

Export it before starting Claude Code (export CLAUDE_IN_CHROME_MANAGED_MCP_REFUSAL=value), or add it to the "env" object in ~/.claude/settings.json to apply it to every session.

All variables, searchable: Claude Code environment variables.