Frequently Asked Questions

Top up your ClaudeN AI prepaid balance with USDT (TRC20 / ERC20 / BEP20) or PayPal — no credit card needed. If you do have a card, Paddle checkout (credit card / Apple Pay) is also supported. Your balance then pays for Claude, GPT and Gemini usage through one API key.

Not with ClaudeN AI. Providers such as Anthropic and OpenAI typically require an international credit card, but ClaudeN accepts USDT and PayPal, so developers in regions where overseas cards are hard to get can still use the same models.

Sign up, open the top-up page, choose USDT and a network (TRC20, ERC20 or BEP20), then transfer the amount to the address shown. After on-chain confirmation your balance is credited automatically and you can start calling the API.

No. ClaudeN AI is fully prepaid and pay-as-you-go: you are billed per token against your balance, there is no subscription, and nothing is auto-charged. When the balance reaches zero, requests simply stop — no surprise bills.

Yes. You can request a refund of unused prepaid balance within 14 days of the top-up by emailing [email protected]. Approved refunds go back to the original payment method within 5–10 business days. Consumed usage and promotional credit are non-refundable.

Yes. Point any OpenAI SDK or tool at the base URL https://clauden.ai/v1 with your ClaudeN API key — no other code changes. The same endpoint serves Claude, GPT and Gemini; you switch models by changing the model name.

Yes. Besides the OpenAI-compatible /v1 endpoint, ClaudeN exposes an Anthropic-compatible endpoint (/v1/anthropic), so Anthropic Messages-format clients also work by swapping the base URL and API key.

In Cursor, set the OpenAI base URL override to https://clauden.ai/v1 and paste your ClaudeN API key, then add model names such as claude-sonnet or gpt-4o. Cline, Continue and other OpenAI-compatible tools are configured the same way.

All three unify multiple models behind one OpenAI-compatible API. ClaudeN differs in billing and hosting: a prepaid balance you can fund with USDT or PayPal (no credit card required), and a fully hosted gateway, so there is nothing to run yourself unlike a self-hosted LiteLLM proxy.

One ClaudeN API key reaches the Anthropic Claude, OpenAI GPT and Google Gemini model families. The live, up-to-date model list with prices is on the pricing page.

Per token. Each model has published input and output token rates, and the cost of each request is deducted from your prepaid balance. The cost calculator helps you estimate spend in advance.

Yes. New accounts receive $5 in free credit after email verification — no credit card required. That is enough to test Claude, GPT and Gemini through the API before your first top-up.

It depends on the model tier and your input/output token mix. Lightweight models (Haiku- or Flash-class) are cheapest for high volume; frontier models cost more per token but need fewer retries. See the Claude vs GPT vs Gemini pricing comparison and the cost calculator.

Sign in and open the console's API Keys page to create keys. You can keep several active keys (for example, one per app) and revoke any key instantly, so a leaked key can be contained without affecting the others.

Revoke the key immediately on the console's API Keys page and create a new one — revocation takes effect right away. Store keys in environment variables or a secret manager, and never commit them to public repositories.

API requests return a 402 "insufficient balance" error and stop being served. Your balance never goes negative and nothing is ever auto-charged. Top up with USDT, PayPal or Paddle and requests resume immediately.

Usually the API key or base URL is wrong. Check that the Authorization header carries your ClaudeN key (Bearer …), that the base URL is https://clauden.ai/v1 rather than the provider's own URL, and that the key is still active in the console.

Your prepaid balance is too low for the request (error code 402). Top up on the billing page: USDT is credited after on-chain confirmation, while PayPal and Paddle usually take just a few minutes.

USDT transfers are credited after network confirmation, which can take a few minutes depending on the chain. If it still is not credited, email [email protected] with your account email and the transaction hash (TXID) so we can locate it on-chain.