Universal HTTP 402 Micropayment Protocol & Autonomous Economic Settlement Engine for AI Agents
Free
Universal HTTP 402 Micropayment Protocol & Autonomous Settlement Engine on Base L2
Payments & Billing · apayprotocol.org
Universal HTTP 402 Micropayment Protocol & Autonomous Economic Settlement Engine for AI Agents
The rest either hold an API key issued by the publisher or ask for nothing.
Listed without a verification tick. Read the listing before installing.