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APIMaster.ai API gateway documentation overview.
APIMaster.ai documentation
Guides for using the APIMaster.ai relay with Claude Code, Cursor, the OpenAI SDK, and more — plus the model marketplace.
Follow the sidebar from Getting started. If something fails, keep a screenshot of the step and the full error message, then reach us via Contact.
Why APIMaster.ai
One endpoint, verification signals
A single host https://apimaster.ai and API key for multiple channels. The marketplace shows pricing and detection history bars to help you choose.
OpenAI-compatible API
Standard POST /v1/chat/completions and related endpoints. Point your SDK or CLI at https://apimaster.ai/v1 with your APIMaster key.
Cost-aware routing
Channels are grouped per model with savings vs official list prices. Manage quota and usage in the console.
Developer-friendly
curl examples, integration guides, and API reference. Create keys in the console; supports OpenAI and Claude protocol families.
Next steps
- Introduction
- Get API Key
- First request
- CLI setup — Claude Code, Codex, Gemini (Windows & macOS)
- Supported models
- Image generation — GPT-Image-2