Feature Request: Support ANTHROPIC_BASE_URL for custom API endpoints

[ramarivera]

Summary

AutoMaker currently does not support custom Anthropic API endpoints via the ANTHROPIC_BASE_URL environment variable. This prevents users from using AutoMaker with:

• LLM gateways (LiteLLM, Helicone, etc.)
• Anthropic-compatible providers (GLM 4.7, Minimax M2.1, Z.AI, etc.)
• Corporate proxies with custom authentication
• Self-hosted deployments with regional endpoints

Root Cause

In apps/server/src/providers/claude-provider.ts, the ALLOWED_ENV_VARS allowlist explicitly filters environment variables passed to the Claude Agent SDK:

// Line 20-29
const ALLOWED_ENV_VARS = [
  'ANTHROPIC_API_KEY',
  'PATH',
  'HOME',
  'SHELL',
  'TERM',
  'USER',
  'LANG',
  'LC_ALL',
];

The Claude Agent SDK (and underlying @anthropic-ai/sdk) does support ANTHROPIC_BASE_URL - it's just being filtered out by AutoMaker before reaching the SDK.

Proposed Solution

Minimal Fix (1 line)

Add ANTHROPIC_BASE_URL to the allowlist:

const ALLOWED_ENV_VARS = [
  'ANTHROPIC_API_KEY',
  'ANTHROPIC_BASE_URL',  // ← Add this
  'PATH',
  'HOME',
  // ...
];

This would allow users to run AutoMaker with custom endpoints:

ANTHROPIC_API_KEY=your-key \
ANTHROPIC_BASE_URL=https://your-gateway.example.com/v1 \
docker-compose up -d

Enhanced Solution (Optional)

For a better UX, consider also adding:

1. ANTHROPIC_AUTH_TOKEN - For gateways that use different auth headers
2. Settings UI integration - Allow configuring the endpoint in the settings panel

Use Cases

1. LLM Gateway Integration: Route through LiteLLM, Helicone, or similar for logging/caching
2. Alternative Providers: Use Anthropic-compatible APIs like GLM 4.7, Minimax M2.1
3. Enterprise Deployments: Corporate proxies with custom authentication
4. Regional Endpoints: Self-hosted or regional API deployments

References

• Claude Code supports this via ~/.claude/settings.json with env.ANTHROPIC_BASE_URL
• Claude Code LLM Gateway docs
• The Claude Agent SDK inherits this from @anthropic-ai/sdk

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Note: Similar issues were searched before filing. This report was created with AI assistance.