In April 2026, the Linux Foundation made x402 a public standard — backed by Coinbase, Google, AWS, Stripe, Visa, Cloudflare.
Two months later, the facilitators are already diverging.
Coinbase CDP rejects valid upto payloads. OpenGradient uses Permit2. OpenLedger uses EIP-712. Same standard, three incompatible implementations. AI agents lose money on every failed inference call.
@decision3/interouter-core is the first facilitator-agnostic middleware for x402. Unified 5-stage payment lifecycle: readState → preparePayment → sign → submit → awaitFinality
What's live today (v0.1.7):
- OpenLedgerAdapter (Base, EIP-712)
- OpenGradientAdapter (Base Sepolia, Permit2)
- NearAdapter (native NEAR payments)
- Fallback routing + circuit breaker
- 59/59 tests passing
- MIT licensed
npm install @decision3/interouter-core
GitHub: github.com/decision3-ai/interouter
Website: decision3.ai
So we built Interouter.