DEFINITION
x402 Protocol
HTTP 402 Payment Required Protocol
Definition
A protocol standard that enables agents to discover services and automatically execute payments for access. Integrated with agentic.market, it allows agents to pay for services out-of-the-box with minimal setup, supporting USDC transactions with near-zero fees on Solana and Base networks
Examples in the Wild
- Example 1:Agent discovers API service on agentic.market and pays USDC automatically
- Example 2:Agent requests premium service and x402 protocol handles payment negotiation
- Example 3:Multi-agent service marketplace using x402 for frictionless payments