Proposes a unified paid API Gateway architecture for x402, integrating OpenAPI-to-x402 Wrapper Generator, a Self-Hosted Facilitator Starter Kit, Persistent SIWX Payment History + Proofs, and Operation-Bound Receipts to streamline existing API integration.
## Summary I want to propose a single architecture direction that ties together four adjacent ideas: 1. OpenAPI-to-x402 Wrapper Generator 2. Self-Hosted Facilitator Starter Kit 3. Persistent SIWX Payment History + Proofs 4. Operation-Bound Receipts I am **not** proposing that all four land at once. I am proposing that x402 consider a shared architecture for them, because they all appear to solve the same higher-level problem: > x402 already has strong payment primitives, but turning an existing API into a trustworthy paid API still requires too much bespoke glue around validation, receipts, repeat-access proofs, and facilitator deployment. Refs: #1645, #1886, #1908, #1759, #1195, #1802 ## Why This Feels Like One Problem, Not Four Today, if I want to wrap an existing API behind x402 and make it production-friendly, I need to solve all of this myself: - how to transform an existing OpenAPI surface into x402 route declarations and middleware - how to bind a payment to the specifi