API Request Builder
Build API requests for OpenAI, Anthropic, and Gemini — model selection, temperature, max tokens, and cURL export. Free in-browser tool.
This tool runs entirely in your browser. Nothing you type is sent to a server.
Frequently asked questions
What is API Request Builder?
API Request Builder Build API requests for OpenAI, Anthropic, and Gemini — model selection, temperature, max tokens, and cURL export. It runs entirely in your browser with no sign-up required.
Is API Request Builder free?
Yes — API Request Builder is 100% free forever. There is no sign-up, no credit card, and no hidden limit.
Which AI models work with API Request Builder?
API Request Builder is model-agnostic and works with ChatGPT (GPT-4), Claude, Gemini, Llama, and most other large language models.
Does API Request Builder send my data to a server?
No. All processing happens locally in your browser — your prompts and text never leave your device.