Give your agent the rein, keep the reins.
Trust-gated wallet for AI agents. Public policy, private spend, treasury-grade insights. Drop into any runtime in 30 seconds.
Everything you need
Policies on-chain. Drop-in everywhere.
Auditable by default.
Built for production
Every feature ships real-world value.
Not demos. Not concepts. Shipped.
Six months of agent commerce pain points — solved, tested, and running on Solana devnet today.
Policies your agent cannot bypass.
Daily caps, per-tx limits, allowlists, and step-up thresholds live in an Anchor program on Solana. A compromised service, a jailbroken prompt, or a rogue dependency cannot override them — the policy is checked inside the transaction.
Every spend. Visible. Refundable.
Real-time WebSocket receipts appear the moment your agent pays. Every transaction is permanently logged on Solana — exportable as CSV or JSON, disputable in one click, and visible to any auditor without giving them wallet access.
Big transactions pause for you.
Set a step-up threshold — any payment above it triggers a push notification to your phone. Your agent pauses, waits up to 5 minutes for approval, then executes or cancels. Biometric confirm, one tap.
Know exactly what your agent costs.
Per-recipient breakdowns, cost-per-task calculations, week-over-week trends, and anomaly flags — all derived from your on-chain receipts. No third-party tracking. The data is yours, permanently.
Shipped 2026-05 · Privacy + treasury layer
Public policy. Private spend.
Treasury-grade insights.
REIN is the only spending layer that stays verifiable on-chain while keeping the things that matter — counterparties, amounts, recipients — private. Plus dollar-denominated observability built for sign-off.
Private spend, by design.
Public agent spend is a non-starter for any business past dev-mode. REIN's policy enforcement stays on-chain and verifiable. Execution rides Umbra's shielded UTXO pool — Solscan sees only a commitment, the owner decrypts in-browser via view key, and auditors get scoped disclosure. Competitors get nothing.
Try the toggle on devnet
Know who you're paying. Before you approve.
Paste a recipient pubkey. REIN renders a graded card: 30-day USD volume, top holdings, first-seen date, protocol match. Green for known protocols. Amber for new addresses. Built on GoldRush data across 100+ chains. Cached for 24h at the edge.
See the policy editorA dashboard your CFO checks.
Token counts don't get sign-off. Dollar totals, week-over-week trends, and real outlier detection do. Every receipt is enriched with USD price at-time-of-spend. Anomalies surface in the panel — outlier amounts (mean + 2σ) and new-recipient flags. Computed live, cached at the edge.
See live insights
30-second setup
One command.
Every runtime.
The CLI detects Claude Code, Cursor, LangChain, OpenAI, Vercel AI, and Python automatically — and writes the config for you.
npx @rein/cli initpip install reinnpm install @rein/langchainWhy now
Four forces are
converging.
x402 hit $10M+ on Solana. Visa and Stripe added agent commerce protocols. MCP became the universal tool layer. Embedded wallets made onboarding under 30 seconds. Nobody has built the guardrail in the middle. That's REIN.
Insignia VC — "Nobody has built this"Pricing
Start free. Scale when your agents do.
For personal agents and experimentation.
- 1 vault
- 100 transactions/month
- MCP + CLI
- Activity feed (30 days)
- Community support
For developers running agents in production.
- 5 vaults
- Unlimited transactions
- All runtimes + Python SDK
- Activity feed (1 year)
- Step-up push notifications
- Priority support
What's next
This is just the beginning.
Key broker, mainnet, enterprise, multi-chain — see the full 1-year vision we're building toward to make every AI agent spending layer safe to deploy at scale.