Implement verifiable, on-chain USDC micropayments directly over HTTP. No custodians, no friction — just fast access control and real-time entitlement on Base.
Drop‑in flows for content, APIs, and tools. Start with pay‑per‑view and scale as you grow.
Start the DemoReliable payment gating for modern applications, with minimal overhead.
Optimized 402 responses unlock content in real time. Works like Web2, settles like Web3.
Enable pay-per-request or pay-per-asset models with predictable fees and instant UX.
Sub-cent costs and quick finality make small payments practical for real products.
On-chain verification ensures access is provable and tamper-resistant.
Clear building blocks to integrate x402 into your existing stack.
Minimal surface area, pragmatic APIs, and a predictable developer experience.
Three simple steps to paywall and grant access.
The user requests a protected resource; the server answers with a 402 challenge.
The client pays in USDC on Base using details from the 402 response.
Upon confirmation, the server unlocks the resource and the client proceeds.
Introduce pay‑per‑action in hours — keep UX crisp and verifiable.
Explore the Flow