Why pay for an AI API without a credit card
A lot of developers cannot — or would rather not — put a credit card on a US AI provider. Cards get declined across borders, some regions are not supported, prepaid cards are rejected, and many people simply prefer not to attach a card to a metered service that could run up a bill. Paying with crypto, USDT, or a local method solves all of these while still giving you Claude and GPT access.
This guide explains the options and how to start with APIVAI, which accepts crypto, USDT, and Alipay alongside cards.
The options, compared
| Method | Card needed? | Good for |
|---|---|---|
| Crypto / USDT | No | Global access, privacy, no card declines |
| Alipay | No | Users in regions where Alipay is common |
| Credit card | Yes | Users who already have a supported card |
Why crypto and USDT work well here
- No card declines or cross-border rejections — it works the same everywhere.
- Prepaid and pay-as-you-go by nature: you top up a balance and spend it down, so there is no surprise monthly charge.
- USDT (a dollar-pegged stablecoin) keeps the amount predictable, unlike volatile coins.
- Less personal payment information attached to your usage.
How to top up with crypto on APIVAI
- Create an account and get your API key.
- Open the balance / top-up page.
- Choose the crypto or USDT option and pay to the address shown.
- Once confirmed, your balance is credited and usable immediately.
Your balance then works across every model behind one OpenAI- and Anthropic-compatible API. There is no subscription — you only spend what you top up.
Using the balance
After topping up, point any OpenAI-compatible client at the APIVAI base URL and send a request. The same key works for Claude and GPT models, in your own code, Cursor, Claude Code, Codex CLI, and agent tools.
curl https://api.apivai.com/v1/chat/completions \
-H "Authorization: Bearer $APIVAI_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"claude-sonnet-4-6","messages":[{"role":"user","content":"Hello"}]}'
Get started
If a card is the only thing standing between you and Claude or GPT access, top up with crypto, USDT, or Alipay instead. Create a key, add a small balance, pick a model from /v1/models, and send your first request — no card required.
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