Sell leftover API credits for cash.
Prepaid keys sit idle. tokensto.cash lists them on Surplus Intelligence. Buyers pay per request. You get USDC on Base.
What this is
Connect a provider key with leftover prepaid credits. Surplus probes the key, stores it encrypted, and routes paid inference through it. tokensto.cash never keeps the key.
Cost basis
Pick Leftover. Floor is 0.05× list. Auto-price undercuts the cheapest healthy, trusted seller and never goes below that floor.
Who it is for
Anyone holding unused OpenRouter, OpenAI, Anthropic, Gemini, DeepSeek, Groq, Mistral, or other prepaid balance they will not spend before it expires.
Cash out
USDC lands in the signed-in Privy wallet. Revolut, Monzo, Chime, and Zelle cash out directly. Venmo, Cash App, Wise, and PayPal need a one-time USDCtoFiat Verify registration on desktop Chrome.
Questions
- Do I lose the leftover credits if nobody buys?
- No. Unused capacity stays on the key. You can pause or delete a listing.
- What is the leftover floor?
- 0.05× list. Pay-as-you-go keys use At cost (1.0×) and never sell below list.