Pay for an LLM API with crypto (USDC/USDT) — no card, from $1
Updated 25 October 2026.
Short answer: call POST /v1/topup, send the exact quoted USDC/USDT amount, then call /v1/topup/verify. You get a tai_ key with credits.
Steps
curl -X POST https://pay.trustai.center/v1/topup -d '{"pack":1,"chain":"base"}'
# send the exact amount to the returned address, then:
curl -X POST https://pay.trustai.center/v1/topup/verify -d '{"order_id":"...","tx_hash":"0x..."}'Supported rails
- USDC on Base
- USDC on Solana
- USDT or USDC on BNB Chain
- x402 per request (USDC on Base) — see x402 LLM API
What it buys
| Model id | Input $/1M | Output $/1M | Context | vs maker list price |
|---|---|---|---|---|
deepseek-v4.1-flash | $0.15 | $0.6 | 1,048,576 | at list price |
glm-5.3-flash | $0.15 | $0.5 | 1,048,576 | at list price |
qwen3-235b | $0.9 | $0.9 | 262,144 | at list price |
gpt-oss-120b | $0.1 | $0.5 | 128,000 | at list price |
qwen3.7-flash | $0.03 | $0.13 | 1,000,000 | at list price |
Prices from /v1/models, snapshot 25 Oct 2026; refreshed daily.
FAQ
Do I need an account or a card?
No. POST /v1/topup returns a deposit address and a tai_ key; send USDC or USDT on Base, Solana or BNB Chain from $1. Or pay per call with x402 (USDC on Base).
Is it OpenAI-compatible?
Yes. Base URL https://pay.trustai.center/v1, POST /v1/chat/completions, streaming supported.