x402 Stateless Settlement-Gated HTTP Protocol
liveStateless settlement-gated HTTP APIs using UTXO replay protection
Developer ToolsAI
What It Does
Details
Enables economic settlement as a stateless authorization method for HTTP requests, allowing APIs and services to require verifiable payment before executing a request. It uses deterministic challenge-response mechanisms to ensure statelessness and prevent transaction replay.
Who It's For
Best fit users
- •API developers
- •e-commerce platforms
- •payment providers
Why It Matters
Why this one made the cut
Reduces the need for traditional account-based systems, enabling direct economic transactions between machines without requiring user accounts or API keys. This enhances security and simplifies integration for pay-per-request APIs and machine-to-machine commerce.
Differentiator
What makes it different
Utilizes UTXO replay protection to ensure each transaction is unique and secure.
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