Connect Codex, Claude Code and the API

1. Get an API key

Sign in, top up your balance and open API key settings. Treat your key like a password and keep it out of public repositories. Ready-to-use installers for your client and operating system are available in the dashboard setup guides.

2. API endpoint and models

https://codex.sale/v1

Use Authorization: Bearer YOUR_API_KEY. Request GET /v1/models to discover the models available to your key. Send model names exactly as returned in the id field.

3. Codex CLI and VS Code

Back up your existing ~/.codex/config.toml before editing it. On Windows the file is under %USERPROFILE%\.codex\config.toml. Preserve your other settings.

model = "gpt-6.1-sol"
model_provider = "codex-sale"

[model_providers.codex-sale]
name = "codex.sale"
base_url = "https://codex.sale/v1"
wire_api = "responses"
env_key = "CODEX_SALE_API_KEY"
supports_websockets = false

Set CODEX_SALE_API_KEY in the environment from which you launch the client. Replace the placeholder with your own key.

macOS and Linux

export CODEX_SALE_API_KEY="YOUR_API_KEY"
codex

Windows PowerShell

$env:CODEX_SALE_API_KEY="YOUR_API_KEY"
codex

These commands set the key for the current terminal. Fully quit VS Code and launch it from that terminal so the extension receives the same environment.

4. Claude Code

Claude Code uses the Anthropic-compatible endpoint. Its base URL is https://codex.sale; the client appends /v1/messages. Select a Claude model available to your key.

macOS and Linux

export ANTHROPIC_BASE_URL="https://codex.sale"
export ANTHROPIC_AUTH_TOKEN="YOUR_API_KEY"
export ANTHROPIC_MODEL="claude-opus-5-5"
claude

Windows PowerShell

$env:ANTHROPIC_BASE_URL="https://codex.sale"
$env:ANTHROPIC_AUTH_TOKEN="YOUR_API_KEY"
$env:ANTHROPIC_MODEL="claude-opus-5-5"
claude

Use the dashboard installer to save your settings or configure Claude Desktop.

5. Your first API request

The following example uses a bash-compatible terminal and the environment variable set above.

curl https://codex.sale/v1/responses \
  -H "Authorization: Bearer $CODEX_SALE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"gpt-6.1-sol","input":"Hello","stream":true}'

List available models:

curl https://codex.sale/v1/models \
  -H "Authorization: Bearer $CODEX_SALE_API_KEY"

Troubleshooting

Check the endpoint, API key, balance and exact model ID. Never send your key in a support message. Use the support contacts for help.