ClaudeN AI
OpenAI-compatible proxy

OpenAI Compatible API Proxy for Claude, GPT and Gemini

Keep your existing OpenAI SDK code. Point it at ClaudeN and instantly access GPT, Claude and Gemini through one compatible endpoint and one prepaid balance.

If you already use the OpenAI Python, Node.js or other SDKs, you can reach Claude and Gemini without rewriting your integration. ClaudeN acts as an OpenAI-compatible API proxy: set the base URL to https://clauden.ai/v1 and use your ClaudeN key. The request and response shapes stay identical to OpenAI.

Why use an OpenAI compatible API proxy

No code rewrite required

Your existing OpenAI SDK calls continue to work. Only the base URL and API key need to change.

One integration, three providers

Call GPT-4o, Claude 3.5 Sonnet or Gemini 1.5 Pro by changing only the model name in the same request format.

Prepaid USDT and PayPal billing

Add balance once with crypto or PayPal. Pay per token across all models with no credit card or recurring fees.

Works with your current tools

LangChain, LlamaIndex, LiteLLM, curl and any OpenAI-compatible client work without modification.

How to start using the OpenAI compatible proxy

  1. Create a ClaudeN account — Sign up with email. Receive free trial credit and an API key that works with any OpenAI SDK.
  2. Update your base URL — Set the base URL in your OpenAI client to https://clauden.ai/v1.
  3. Use your ClaudeN key — Replace the api_key with your ClaudeN key. Keep organization and other headers as they are.
  4. Select the model per call — Use model names like gpt-4o, claude-3-5-sonnet-20241022 or gemini-1.5-pro. The proxy routes to the right provider.

Minimal code change example

Only the base URL and API key change. Everything else stays the same.

OpenAI Python SDK from openai import OpenAI client = OpenAI( api_key="$CLAUDEN_API_KEY", base_url="https://clauden.ai/v1", ) resp = client.chat.completions.create( model="gpt-4o", messages=[{"role": "user", "content": "Hello from ClaudeN proxy"}], ) print(resp.choices[0].message.content)

Resources

OpenAI-Compatible API for Claude, GPT & Gemini Anthropic Compatible API — Call Claude with OpenAI SDK USDT AI API — Pay for Claude, GPT & Gemini with Crypto AI API Without a Credit Card — Claude, GPT & Gemini LLM API Gateway — One Endpoint for Claude, GPT & Gemini Claude vs GPT vs Gemini API Pricing & Comparison Cheap LLM API — Low-Cost Access to Claude, GPT & Gemini LLM API Proxy — One Gateway for Claude, GPT & Gemini Claude API Proxy — Use Anthropic Claude Without an Account GPT API Proxy — Use OpenAI GPT Without an Account Gemini API Proxy — Use Google Gemini With Prepaid Credit OpenAI Alternative API — Drop-in Compatible Endpoint OpenRouter Alternative with USDT — Claude, GPT & Gemini LiteLLM alternative with USDT Cursor GPT API without OpenAI account Claude vs GPT vs Gemini API Quick Start Examples

OpenAI compatible API proxy — frequently asked questions

Is this an official OpenAI service?

No. ClaudeN is an independent gateway that provides an OpenAI-compatible interface to multiple providers including OpenAI, Anthropic and Google. It is not operated by OpenAI.

Can I use the official OpenAI SDKs?

Yes. Point your OpenAI SDK base URL to https://clauden.ai/v1 and use your ClaudeN key. The request and response shapes are compatible.

Do I still need an OpenAI account?

No. One ClaudeN account and key is enough to call GPT, Claude and Gemini models.

How do I pay?

Fund a prepaid balance with USDT or PayPal. You pay per token across every model — no credit card or subscription.

Sign up and get $5 free credit

Keep your existing OpenAI SDK code. Point it at ClaudeN and instantly access GPT, Claude and Gemini through one compatible endpoint and one prepaid balance.

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Sign up and get $5 free credit