NO_PROXY

Updated October 13, 2026 by Alex Sorokoletov

NO_PROXY is a Claude Code environment variable: Domains to bypass proxy (comma-separated). Its release history is not tracked here. It is listed in the official reference.

How to set it

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

export NO_PROXY=<value>
claude

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

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

Release notes that mention it

• claude-code-env-vars-v2-1-292

Related variables

• 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.
• CLAUDE_CODE_SIMULATE_PROXY_USAGE: Simulates proxy-based API routing without an actual proxy.

Frequently asked questions

All variables, searchable: Claude Code environment variables.