HTTP 402 Payment / x402 Protocol
A standardized HTTP response code and protocol for requesting and processing digital asset payments.
What is HTTP 402 Payment / x402 Protocol?
The x402 Protocol leverages the HTTP 402 “Payment Required” status code to enable programmatic digital asset transactions between clients and servers. When a client attempts to access a gated resource, the server responds with a 402 status, including payment instructions such as amount and recipient. The client then re-requests the resource with a payment authorization header, and upon verification by a payment facilitator, the server delivers the resource. This protocol, authored by Coinbase, supports use cases like micropayments for AI agents or real-time data feeds, enhancing web monetization.
Related Terms
Whale
A large investor or entity holding a substantial amount of a digital asset or capital, capable of influencing market prices due to their significant holdings.
Trading Fee
A fee charged by a Perp DEX for executing trades.
Wisdom of the Crowds
The phenomenon where the collective judgment of a diverse group often surpasses individual or expert predictions.
Double Spend
Attempting to spend the same digital asset more than once in a blockchain network.
TVL (Lending)
Total value of digital assets locked in DeFi lending protocols for borrowing and lending activities.
US GAAP Stablecoin Classification
Accounting standards under U.S. Generally Accepted Accounting Principles treating certain USD-pegged stablecoins as cash equivalents.