ANTHROPIC_VERTEX_BASE_URL

Updated October 13, 2026 by Alex Sorokoletov

ANTHROPIC_VERTEX_BASE_URL is a Claude Code environment variable. Its release history is not tracked here. It is listed in the official reference.

Status	Present in v2.1.294
Category	Cloud providers
Official docs	Listed

How to set it

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

export ANTHROPIC_VERTEX_BASE_URL=<value>
claude

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

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

Related variables

ANTHROPIC_AWS_BASE_URL
ANTHROPIC_BEDROCK_BASE_URL: Alternative Bedrock endpoint (alias).
ANTHROPIC_BEDROCK_MANTLE_BASE_URL
ANTHROPIC_FOUNDRY_BASE_URL: Custom Foundry endpoint.
ANTHROPIC_VERTEX_PROJECT_ID: Google Cloud project ID.
ANTHROPIC_AWS_API_KEY
ANTHROPIC_AWS_WORKSPACE_ID
ANTHROPIC_BEDROCK_REGION_PREFIX

Frequently asked questions

Which Claude Code version has ANTHROPIC_VERTEX_BASE_URL?

Its release history is not tracked here.

How do I set ANTHROPIC_VERTEX_BASE_URL?

Export it before starting Claude Code (export ANTHROPIC_VERTEX_BASE_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.