An OpenRouter alternative with one OpenAI- and Anthropic-compatible API key for 150+ models, including Claude, GPT, Gemini, and DeepSeek. Use it with coding agents like Claude Code, Cursor, and Cline, or get started with npx @atmorouter/helper. Pay as you go with prepaid top-ups only—no subscription. Average ~65% below official list prices, and failed upstream requests aren’t billed.