Pay for AI APIs with USDT — Claude, GPT, Gemini, DeepSeek
Top up with USDT on TRON (TRC20), BNB Smart Chain (BEP20) or Polygon — USDC works too — and use 50+ models through one OpenAI-compatible key. From $5, pay as you go, no card and no subscription.
$ curl https://www.ruapi.ai/v1/chat/completions \
-H "Authorization: Bearer sk-..." \
-H "Content-Type: application/json" \
-d '{
"model": "claude-sonnet-5",
"messages": [{"role": "user", "content": "Hello"}]
}'Only BASE_URL and KEY — zero business code changes.
Why pay for AI APIs in USDT
No card needed.
Top up straight from your crypto wallet or exchange. No bank card, no subscription and no monthly minimum — from $5 per top-up, and the balance never expires.
Pay from any wallet or exchange.
Send on TRC20, BEP20 or Polygon (not ERC20 or TON). The payment page gives you an address generated for your order and the exact amount; your balance updates automatically once the network confirms the transfer.
One balance, 50+ models.
The same USD balance pays for Claude, GPT, Gemini, DeepSeek, Qwen, GLM, Kimi and more through one OpenAI-compatible key — plus the native Anthropic API for Claude Code.
Supported networks
TRC20 (TRON)
the most widely used USDT network
usually credited in 1–3 min
BEP20 (BNB Smart Chain)
supported by all major wallets
usually credited in 1–5 min
Polygon
low network fees
usually credited in 2–10 min
USDT / USDC or a card: what’s the difference
| USDT / USDC | Visa / Mastercard | |
|---|---|---|
| Minimum top-up | $5 | $5 |
| Balance credited | After network confirmation: TRC20 1–3 min, BEP20 1–5 min, Polygon 2–10 min | Usually within seconds |
| What you need | A crypto wallet or an exchange account | A card enabled for international online payments |
| Fees | The withdrawal or network fee of your wallet / exchange | Your bank’s own fees, if any |
| Refund of unused balance (7 days) | In the same coin to your wallet, minus the network fee | To the same card, minus payment processing fees |
| Main thing to watch | Send only on the network you selected | Cards issued in Russia are declined |
Times are typical, not guaranteed. Full rules: docs.ruapi.ai/en/topup and docs.ruapi.ai/en/legal/refund (September 2026).