CLAUDE_GATEWAY_PROXY_IS_EGRESS_BOUNDARY

Updated October 14, 2026 by Alex Sorokoletov

CLAUDE_GATEWAY_PROXY_IS_EGRESS_BOUNDARY 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.

How to set it

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

export CLAUDE_GATEWAY_PROXY_IS_EGRESS_BOUNDARY=<value>
claude

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

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

Related variables

• CLAUDE_CODE_GATEWAY_MODEL_DISCOVERY_TIMEOUT_MS
• CLAUDE_CODE_HOST_HTTP_PROXY_PORT: HTTP proxy port for host.
• CLAUDE_CODE_HOST_SOCKS_PROXY_PORT: SOCKS proxy port for host.
• CLAUDE_CODE_HTTP_PROXY: Claude-namespaced HTTP proxy URL.
• CLAUDE_CODE_HTTPS_PROXY: Claude-namespaced HTTPS proxy URL.
• CLAUDE_CODE_PROXY_HOST: Proxy hostname, passed alongside the URL so helpers that route credentials by hostname don't need to re-parse.
• CLAUDE_CODE_PROXY_RESOLVES_HOSTS: Proxy handles DNS resolution (skip local DNS).
• CLAUDE_CODE_PROXY_URL: Full proxy URL, injected into the helper subprocess's environment.

Frequently asked questions

All variables, searchable: Claude Code environment variables.