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ethereal is an OpenAI-compatible gateway, so almost any tool where you can set a base URL and an API key works. The principle is the same everywhere.

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What to plug in

Client typeBase URLKey
OpenAI-compatible (Cursor, Cline, Continue, Aider, Zed, OpenAI SDK)https://api.ethereal.llc/v1eth-...
Claude Code (Anthropic CLI)https://api.ethereal.llceth-...
Universal environment variables: 
# OpenAI-compatible tools
export OPENAI_BASE_URL="https://api.ethereal.llc/v1"
export OPENAI_API_KEY="eth-..."

# Anthropic style (Claude Code)
export ANTHROPIC_BASE_URL="https://api.ethereal.llc"
export ANTHROPIC_API_KEY="eth-..."

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Guides

Claude Code (CLI)

Cursor

Cline

Continue.dev

Aider

Zed

SDK (OpenAI)

Models: claude-opus-4-8, claude-sonnet-4-6, claude-haiku-4-5 (list and rates).