Credits for open models — Qwen, Llama, Mistral, DeepSeek, gpt-oss — from independent GPU hosts, at a discount. Or pay per call, a fraction of a cent each, with x402. Sell what you don’t use.
Teams buy credits in big packs and use some of them. The rest sits there until it expires. GPU hosts have the same problem with servers that sit idle between busy hours.
SIX gives both a price. Hosts sell credits for the open models they run, buyers get them at a discount, and whatever is left can be sold again. Every call runs through the SIX gateway.
SIX serves every call through its own gateway. Your money is held until the call is actually served.
Pay in USDC. Buy a credit pack at a discount, or just pay per call with x402 — a fraction of a cent, no minimum.
A credit pack lands in your wallet: model, balance, expiry date. You can send it to anyone or sell it.
Call the SIX gateway like any chat-completions API. Every call is counted and gets a receipt you can check.
Sellers get paid per receipt. Anything you don’t use, you put up for sale — and someone else uses it.
Point your app or AI agent at the SIX gateway. The first call comes back with 402 Payment Required and a tiny price. Your app pays it in USDC and tries again. That’s it — a typical call costs a fraction of a cent, settled on Solana in seconds.
→ POST /v1/chat/completions model: <open model> ← 402 Payment Required price: up to a fraction of a cent, in USDC → POST /v1/chat/completions + payment ← 200 OK X-SIX-Receipt · tokens in / out · cost
Sellers are independent GPU hosts running open-weight models. A host lists a model only when its license allows commercial serving — Apache-2.0, MIT or the Llama license, checked one model at a time.
OpenAI, Claude and Gemini credits come later, listed only through approved deals.
Start sellingEvery purchase, every per-call payment, every resale, every payout. Prices are in dollars. Buying AI credits shouldn’t feel like trading.
Sellers put down a small deposit when they list. They get it back when the sale completes, and lose it if they can’t deliver.
Hold $SIX to pay less than the 2% fee. That’s all it does. Token details are published before launch.