ClaudeN AI
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Anthropic compatible API for Claude, GPT & Gemini

Point your OpenAI client at ClaudeN, change only the base URL and key, and call Claude through an Anthropic-compatible surface — or switch to GPT and Gemini with one line.

⚠️ 目前全部接口臨時導向 grok-4.3
由於上游 GPUHUB 故障，所有 OpenAI / Anthropic / Gemini 相容接口的請求已強制路由至本地 CLIProxyAPI，並統一使用模型 grok-4.3。
此為臨時備援措施，恢復後將切回 GPUHUB 方式。

ClaudeN exposes an Anthropic-compatible and OpenAI-compatible API so you can reach Claude, GPT and Gemini without separate vendor accounts. Reuse the official OpenAI SDK, set a new base URL, and switch models with a single parameter. One prepaid balance funded by USDT or PayPal powers every request.

Why use an Anthropic-compatible gateway

OpenAI SDK works unchanged

Chat Completions requests stay the same. Only base_url and api_key change.

True Anthropic compatibility

Messages API shape for Claude is supported alongside the OpenAI shape.

One key, every model

The same key reaches Claude, GPT and Gemini — switch without new accounts.

Pay with USDT or PayPal

Prepaid balance, no credit card, no per-provider billing.

How to call Claude with an OpenAI SDK

  1. Sign up and get a key — Create a free ClaudeN account. Add credit with USDT or PayPal and copy your API key.
  2. Set base URL and key — Configure your OpenAI client to use https://clauden.ai/v1 and your ClaudeN key.
  3. Choose a model — Use claude-3-5-sonnet-20241022 (or any Claude, GPT or Gemini model name).
  4. Send the request — Call the same Chat Completions or Messages endpoint you already use.

Example: Anthropic-compatible call

Python example using the OpenAI SDK pointed at ClaudeN. Switch models by changing the model string.

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="claude-3-5-sonnet", messages=[{"role": "user", "content": "Hello from ClaudeN"}], ) print(resp.choices[0].message.content)

Resources

USDT AI API — Pay for Claude, GPT & Gemini with Crypto AI API Without a Credit Card — Claude, GPT & Gemini OpenAI-Compatible API for Claude, GPT & Gemini Anthropic Compatible API — Call Claude with OpenAI SDK 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 LLM API Gateway — One Endpoint for Claude, GPT & Gemini Claude API Proxy — Use Anthropic Claude Without an Account Cursor + Claude API OpenRouter Alternative with USDT — Claude, GPT & Gemini LiteLLM alternative with USDT Cursor GPT API without OpenAI account Quick Start Examples

Anthropic compatible API — frequently asked questions

Is this the official Anthropic API?

No. ClaudeN is an independent gateway that offers an Anthropic-compatible interface to Claude models. It is not operated by Anthropic.

Can I use the official Anthropic SDK?

Yes. Point the Anthropic SDK base URL to https://clauden.ai/v1 and use your ClaudeN key. The request and response shapes match.

Do I still need an Anthropic account?

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

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

Point your OpenAI client at ClaudeN, change only the base URL and key, and call Claude through an Anthropic-compatible surface — or switch to GPT and Gemini with one line.

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Sign up and get $5 free credit