Pay-per-prompt AI inference. An agent calls an ordinary OpenAI-compatible endpoint with no account and no API key, pays $0.002000–$0.006000 USDC, by model inline over HTTP 402, and the prompt is routed to an independent GPU operator who is paid on chain.
USDC has 6 decimals, so every figure below is an exact integer of atomic units. The gateway
never does floating-point arithmetic on money, and asserts
inbound − payout = margin before any funds move.
| Model | Client pays | Operator gets | Margin | Atomic in |
|---|---|---|---|---|
| llama-3.3-70b-versatile | $0.006000 | $0.005100 | $0.000900 | 6000 |
| Any other model | $0.002000 | $0.001700 | $0.000300 | 2000 |
POSTs an OpenAI-shaped body with no payment header.402; the machine-readable challenge rides in the payment-required header.PAYMENT-SIGNATURE — an Algorand atomic group. The facilitator sponsors the fee, so it is gasless for the payer.This sends a real unpaid request to the paid route and shows you the actual challenge that comes back — no wallet required.
integrate in 60s → or open the chat client →