19 milestones shipped · devnet liveBuilding the spending layer
Building the spending layer
for every AI agent.
REIN started as the missing guardrail for x402 payments. It ends as the canonical policy engine for agent commerce — across every chain, every runtime, every API.
ShippedBuildingPlanned
Q2 2026 — Now
Foundation shipped
Anchor policy engine — 7 on-chain instructions
shipped 2026-05Daily cap, per-tx cap, allowlist, step-up threshold, expiry — enforced by program, not SaaS DB
shipped 2026-05x402 native USDC payments on Solana devnet
shipped 2026-05SpendReceipt PDA — every tx bounded, auditable, refundable
shipped 2026-05Step-up approval flow (owner one-click approve/deny)
shipped 2026-05Pause / dispute / expire + blocklist
shipped 2026-05Drop-in MCP server — spend, balance, history, request_step_up
shipped 2026-05Works in Claude Code, Cursor, Claude Desktop out of the box
shipped 2026-05LangChain tool wrappers
shipped 2026-05OpenAI Functions JSON schema export
shipped 2026-05Vercel AI SDK helpers
shipped 2026-05Python SDK (CrewAI / LangGraph / AutoGen)
shipped 2026-05`rein init` CLI — installs MCP config in any runtime
shipped 2026-05Owner dashboard — policy editor, activity feed, step-up UI, insights, settings
shipped 2026-05Real-time receipts via WebSocket + Helius webhook
shipped 2026-05Cloudflare Workers service + Durable Objects activity stream
shipped 2026-05Confidential receipts via Umbra (Arcium-powered shielded UTXO spend)Shipped 2026-05 — owner-private agent spend, on-chain policy stays public
shipped 2026-05Anomaly detection (heuristic) via GoldRushShipped 2026-05 — outlier amounts (mean + 2σ) + new-recipient flags + USD-denominated insights
shipped 2026-05Recipient reputation in policy editor (GoldRush)Shipped 2026-05 — graded card on paste, 24h cached at the edge
shipped 2026-05Q3 2026
Mainnet + key broker
External security audit — program, key-broker designAudit funded via Solana Foundation RFP or accelerator grant
Mainnet launch — Squads multisig as upgrade authority
Immunefi bug bounty ($10k pool on launch)
Key broker — 2-of-3 Shamir share split (wallet + KV + device)
Encrypted API key vault on Cloudflare KV
`rein.proxy(service, request)` — agent never sees the keyBridges crypto and traditional APIs: OpenAI, AWS, Anthropic, GitHub Pro
Per-service cost estimator (token-based for LLMs)
Batched on-chain settlement of proxied spend
Squads multisig ↔ REIN policy composition (DAO treasury agents)
Anonymous-mode UTXO (Umbra stealth addresses)Extends Q2 confidential receipts to fully anonymous recipient addresses
Compliance grants UI (Umbra view-key disclosure flow)Scoped auditor disclosure of confidential receipts without exposing the owner key
Q4 2026
Enterprise + ecosystem
Enterprise tier — SSO, SLA, audit export, custom domains
Subscription billing / recurring x402 (v2)
Mobile app — iOS + Android for step-up push approvals
Agent marketplace — share and sell policy templates
"REIN inside" partner badge program — embed in CrewAI, LangGraph, AutoGen
Docs site with full API reference and runtime recipes
Granular telemetry — cost-per-task, model-by-model breakdown
2027
Multi-chain + privacy
Multi-chain support — EVM (Base, Arbitrum) + Cosmos via IBC
KYA (Know Your Agent) — on-chain agent identity attestationsComposable with existing KYC providers
Multi-currency insights (EUR/GBP via Covalent)
Agent-to-agent spending — agents fund sub-agents from the same vault
Visa + Stripe bridge — x402 policies enforced on fiat railsVisa Trusted Agent Protocol + Stripe Agent Commerce Protocol
The agentic economy needs a spending layer.
$10M+ in x402 volume on Solana. 35M+ agent transactions. Zero trust checks. REIN is the guardrail that makes autonomous agents safe to deploy at scale.