About Stable402

Stable402.com is the live x402 compliance reference — a portfolio property in the StablecoinAtlas.com family, the compliance reference for stablecoin infrastructure.

Where the Atlas diagrams the x402 payment lifecycle across all 8 STP stages, Stable402 runs it: a working end-to-end demo that buys a compliance report from StableKYA.com for $0.001 testnet USDC, signed by a Coinbase Smart Wallet and settled on Base Sepolia via the Coinbase CDP x402 facilitator.

The reference lives on the Atlas. The proof lives here.

x402 is no longer a single-vendor protocol. Coinbase shipped the spec; Cloudflare ships facilitator infrastructure on the edge; Solana Foundation and Google Cloud launched pay.sh on it in May 2026 with Gemini, Vertex AI, and BigQuery shipping as x402-payable endpoints. Stable402 is the chain-agnostic, compliance-aware reference that sits alongside all of them.