I have been using Factory Droid for the past 2 weeks and I like it. I don’t find that it’s worse than Claude Code (other than the lack of vi mode) and the startup time is much faster.

However, Droid expects API keys for Anthropic, but Claude Code Max subscriptions use OAuth tokens. CLIProxyAPI bridges this gap—it accepts API key requests from Factory and converts them to OAuth-authenticated requests.

Install CLIProxyAPI

brew install go
git clone https://github.com/luispater/CLIProxyAPI.git
cd CLIProxyAPI
go build -o cli-proxy-api ./cmd/server

Configure the Proxy

Create config.yaml:

port: 8317
remote-management:
  allow-remote: false
  secret-key: ""
auth-dir: "~/.cli-proxy-api"
debug: false
logging-to-file: false
usage-statistics-enabled: true
proxy-url: ""
request-retry: 3
quota-exceeded:
  switch-project: true
  switch-preview-model: true
auth:
  providers: []
generative-language-api-key: []

Authenticate with Claude

./cli-proxy-api --claude-login

This opens your browser for OAuth. Tokens are saved to ~/.cli-proxy-api/claude-{email}.json.

Configure Factory

Add to ~/.factory/config.json:

{
  "custom_models": [
    {
      "model": "claude-opus-4-1-20250805",
      "base_url": "http://localhost:8317",
      "api_key": "dummy-not-used",
      "provider": "anthropic"
    },
    {
      "model": "claude-sonnet-4-20250514",
      "base_url": "http://localhost:8317",
      "api_key": "dummy-not-used",
      "provider": "anthropic"
    }
  ]
}

The api_key field is required by Factory but ignored by the proxy.

Run

Start the proxy:

./cli-proxy-api --config config.yaml

Then start Factory Droid and select your model with /model.

If you need to re-authenticate later, run ./cli-proxy-api --claude-login again.

Update: Using Opus 4.6

Using Opus 4.6 with Factory Droid is easier than before—no need to update config.json. Just make sure the proxy is up to date and rebuild:

cd CLIProxyAPI
git pull
go build -o cli-proxy-api ./cmd/server

Start the proxy as before, then use /model in Factory Droid and choose claude-opus-4-6.