Add pr402 Facilitator for Solana

[miralandlabs]

Add pr402 Facilitator — The Liquidity Layer for the Autonomous Web (Solana)

Summary

This PR introduces pr402, a high-performance, agent-native liquidity layer for the Solana ecosystem.

As we pivot from human-in-the-loop applications to autonomous AI agents, traditional financial infrastructure like credit cards and monthly subscriptions have become systemic bottlenecks. pr402 dismantles this "Subscription Trap" by providing a deterministic, agent-native REST gateway that translates agentic intent into sub-second on-chain settlement.

Key Features (The Economic Baseline)

• Agent-Native REST Gateway: Abstracts the cryptographic complexity of Solana, allowing autonomous systems to initiate settlement via standard HTTP primitives without heavy blockchain SDKs.
• Economic Agency via Multi-Scheme Support:
  • ✅ v2:solana:exact (UniversalSettle): High-frequency economic pulses for micro-payments (e.g., per-inference billing).
  • ✅ v2:solana:sla-escrow (SLA-Escrow): High-stakes, conditional settlement for complex, asynchronous tasks.
• Zero-Barrier Economy: Implements JIT (Just-in-Time) provisioning for sellers, ensuring 100% payout precision and zero upfront SOL requirements for merchant onboarding.
• Economic Proof Adjudication: Introduces the build-confirm API, enabling trusted Oracles to provide cryptographic "Economic Proofs" of service delivery via a simplified REST interface.
• Optimized for the Autonomous Web: Engineered in Rust and optimized for Vercel Serverless Functions to provide the low-latency baseline required by high-velocity agent swarms.

Official Endpoints

• Production (Mainnet), recommended: https://ipay.sh — also (same APIs; not deprecated): https://agent.pay402.me
• Preview (Devnet), recommended: https://preview.ipay.sh — also (same APIs; not deprecated): https://preview.agent.pay402.me
• Documentation: https://docs.ipay.sh — also (same site; not deprecated): https://docs.pay402.me

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The transaction is the authorization. The payment is the key.
Explore the gateway at ipay.sh (recommended) · agent.pay402.me (same service)