x402 is a new open payment protocol developed by Coinbase that enables instant, automatic stablecoin payments directly over HTTP.By reviving the HTTP 402 Payment Required status code, x402 lets services monetize APIs and digital content onchain, allowing clients, both human and machine, to programmatically pay for access without accounts, sessions, or complex authentication.
The x402 Facilitator handles payment verification and settlement so that sellers don’t need to maintain their own blockchain infrastructure.The Coinbase Developer Platform (CDP) offers a Coinbase-hosted facilitator service that processes fee-free USDC payments on the Base network, offering a streamlined and predictable experience for both buyers and sellers.Facilitators handle verification and settlement, so sellers do not need to maintain blockchain infrastructure.CDP’s x402 facilitator provides:
Fee-free USDC payments on the Base network
Fast, onchain settlement of transactions
Simplified setup for sellers to start accepting payments
CDP’s x402 facilitator is designed as a facilitator on top of an open standard, which is not tied to any single provider. Over time, the facilitator will include:
A discovery layer for buyers (human and agents) to find available services
Support for additional payment flows (e.g., pay for work done, credit based billing, etc.)
Optional attestations for sellers to enforce KYC or geographic restrictions
Support for additional assets and networks
The goal is to make programmatic commerce accessible, permissionless, and developer-friendly.