Proposes adding Miden-native x402 payment verification, including private notes and note transport, to enable privacy-preserving machine-to-machine payment infrastructure using the x402 protocol.
### Context I've been building privacy-preserving machine-to-machine payment infrastructure using the [x402 protocol](https://www.x402.org/) (HTTP 402 Payment Required) across multiple chains. My existing Miden work: | Repo | Description | |------|-------------| | [privagent-miden](https://github.com/Himess/privagent-miden) | Trustless atomic agent payments — native SWAP notes + custom MASM escrow (HTLC) | | [x402-chain-miden](https://github.com/Himess/x402-chain-miden) | Rust facilitator for x402 on Miden — P2ID verification, STARK TransactionVerifier | | [x402-miden-agent-sdk](https://github.com/Himess/x402-miden-agent-sdk) | TypeScript SDK — AI agents create Miden wallets + handle x402 payments (WASM) | | [x402-miden-middleware](https://github.com/Himess/x402-miden-middleware) | One-line Express/Hono paywall middleware for Miden x402 | | [x402-miden-cli](https://github.com/Himess/x402-miden-cli) | `npx create-miden-agent` scaffolding tool (3 templates) | > **Note:** These repos r