APIMaster.ai FAQs

How much cheaper is it than official OpenAI or Anthropic pricing?

OpenAI GPT API keys are available at up to 90% off, Claude API keys at up to 85% off, and DeepSeek API at around 30% off official pricing. All discounts apply to fingerprint-verified channels that serve the same models at lower costs.

How do I know the API keys serve the real model?

APIMaster uses black-box LLM fingerprint detection to distinguish genuine GPT-5 or Claude from cheaper substitutes. Every provider is tested before listing, and detection results are publicly available on the leaderboard for transparency.

What payment methods are accepted?

The platform accepts USDT and Epay, making it accessible in regions where traditional billing options are limited, including China, Russia, and Southeast Asia.

Is the API compatible with existing code?

Yes. APIMaster uses the standard /v1/chat/completions endpoint. Simply replace the base URL in any OpenAI-compatible tool — including the OpenAI Python SDK, LangChain, LiteLLM, Cursor, and Claude Code — and the integration works without further changes.

Which AI models are available?

Currently supported models include GPT-5.4, GPT-5.5, GPT-Image-2, Claude Sonnet 4.6, Opus 4.7 and 4.8, Fable 5, DeepSeek V4 Flash and Pro, MiniMax M3, and Kimi K2.7 Code. New models are added as they pass fingerprint verification.

• Sign up: Create an account on APIMaster.ai and generate an OpenAI-compatible API key in seconds, with no credit card required for registration.
• Top up your balance: Add credits through USDT or Epay. A single balance works across all models and providers on the platform.
• Integrate the API: Replace your existing base URL with the APIMaster endpoint in any OpenAI-compatible tool — including the OpenAI Python SDK, LangChain, LiteLLM, Cursor, and Claude Code. The /v1/chat/completions endpoint works identically to the official API.