Surplus Intelligence | Open Market for AI Inference

● healthy ai

Buy the cheapest inference. Sell your credits. The open order book for AI models. Up to 90% off GPT-5.5, Claude Opus 4.8, and more.

How to call

cURL · x402-fetch / x402-axios will auto-handle 402

curl -X POST https://www.surplusintelligence.ai

/.well-known/x402.json