CLAUDE_CODE_CUSTOM_OAUTH_URL

Updated October 13, 2026 by Alex Sorokoletov

CLAUDE_CODE_CUSTOM_OAUTH_URL is a Claude Code environment variable: Custom OAuth endpoint URL. Present since v2.1.69 or earlier and still present in v2.1.294. It is not in the official reference.

Status	Present in v2.1.294
Added	Present since v2.1.69 or earlier
Category	Authentication
Official docs	Not listed

How to set it

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

export CLAUDE_CODE_CUSTOM_OAUTH_URL=<value>
claude

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

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

Release notes that mention it

165 Environment Variables in Claude Code 2.1.69 — What Changed in 50 Versions

Related variables

CLAUDE_AI_AUTHORIZE_URL: Authorization URL endpoint.
CLAUDE_CODE_OAUTH_CLIENT_ID: Custom OAuth client ID.
CLAUDE_CODE_OAUTH_REFRESH_TOKEN: OAuth refresh token.
CLAUDE_CODE_OAUTH_SCOPES: OAuth scopes for refresh token.
CLAUDE_CODE_OAUTH_TOKEN: Pre-configured OAuth access token.
CLAUDE_CODE_OAUTH_TOKEN_FILE_DESCRIPTOR: File descriptor to read OAuth token from.
CLAUDE_CODE_SDK_HAS_OAUTH_REFRESH: Signals to the Claude Code runtime that the SDK caller has already provided an OAuth refresh token.
CLAUDE_LOCAL_OAUTH_API_BASE: Overrides the base URL for local OAuth API operations.

Frequently asked questions

What does CLAUDE_CODE_CUSTOM_OAUTH_URL do?

Custom OAuth endpoint URL

Which Claude Code version has CLAUDE_CODE_CUSTOM_OAUTH_URL?

Present since v2.1.69 or earlier and still present in v2.1.294.

How do I set CLAUDE_CODE_CUSTOM_OAUTH_URL?

Export it before starting Claude Code (export CLAUDE_CODE_CUSTOM_OAUTH_URL=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.