OpenAI alternative API — drop-in compatible
Keep the OpenAI SDK you already use and just switch the base URL. ClaudeN is a drop-in OpenAI alternative that also gives you Claude and Gemini from one key.
ClaudeN AI is a drop-in OpenAI alternative API. It speaks the same OpenAI Chat Completions format, so migrating is as simple as changing the base URL to https://clauden.ai/v1 and swapping in your ClaudeN key. Beyond matching OpenAI GPT models, the same endpoint also reaches Claude and Gemini, and you fund everything from one prepaid balance topped up with USDT or PayPal — no credit card required.
Why choose this OpenAI alternative
Truly drop-in
Same request and response shapes as OpenAI. Change the base URL and key — nothing else.
More than GPT
The same endpoint also serves Claude and Gemini, so you are not tied to one vendor.
No credit card
Fund a prepaid balance with USDT or PayPal and pay per token, with no card on file.
One key, one balance
A single key and balance covers every model, so billing and integration stay simple.
How to switch from OpenAI to ClaudeN
- Get your key — Sign up, add prepaid credit with USDT or PayPal, and copy your OpenAI-compatible key.
- Change the base URL — Point your existing OpenAI client at https://clauden.ai/v1 instead of the default host.
- Keep your code — Your Chat Completions calls stay the same. Only the base URL and key change.
- Pick any model — Set the model name to a GPT, Claude or Gemini model to route to the provider you want.
リソース
OpenAI alternative API — frequently asked questions
Is ClaudeN a drop-in OpenAI alternative?
Yes. ClaudeN uses the OpenAI-compatible Chat Completions format, so you migrate by changing only the base URL and API key. Your existing OpenAI SDK and code keep working.
What base URL do I use?
Point your OpenAI client at https://clauden.ai/v1 and use your ClaudeN key. Everything else about your integration stays the same.
Does it only cover GPT models?
No. As well as GPT-style models, the same endpoint reaches Claude and Gemini. You switch by changing the model name in your request.
Do I need a credit card?
No. You fund a prepaid balance with USDT or PayPal and pay per token — there is no credit card requirement and no subscription.
Will my OpenAI SDK keep working?
Yes. Because ClaudeN mirrors the OpenAI API surface, the official OpenAI SDK works unchanged apart from the base URL and key.
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Keep the OpenAI SDK you already use and just switch the base URL. ClaudeN is a drop-in OpenAI alternative that also gives you Claude and Gemini from one key.
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