What is nuez?
nuez is the payment layer for AI agents operating in Argentina. It sits on top of regulated Argentine payment rails — bank transfers, card issuing, and a crypto off-ramp — and exposes all of it through a policy engine that lets an agent act autonomously below a threshold and pauses for human approval above it.
The problem
Section titled “The problem”AI agents can reason. They can’t be trusted with a bank password.
Connecting an agent to payment rails today means one of two extremes:
- Give the agent full account credentials → unacceptable risk (a hallucination or prompt injection can drain the account)
- Require human approval for every operation → kills autonomy, defeats the purpose
nuez fills the middle: per-user configurable thresholds (per-transaction, daily, monthly, and an absolute cap), evaluated by a policy engine before every payout. Under the threshold, the agent executes immediately. Above it, execution pauses and the account owner approves or rejects from WhatsApp or Telegram.
What nuez provides
Section titled “What nuez provides”| Layer | What it does |
|---|---|
| Wallet / CVU | An ARS account with its own CVU. Fund it from any Argentine bank, Mercado Pago, or Ualá. |
| Payouts (withdraws) | Send ARS to a CVU/CBU/alias. Every payout passes through the policy engine. |
| Cards | Issue single-use or multi-use virtual debit cards funded from the wallet. |
| Bill payments | Pay utility bills (Rapipago/Pago Fácil network companies) with an optional auto-approve whitelist. |
| Crypto off-ramp | Receive crypto (USDC etc.) via dedicated deposit addresses and convert to ARS, with optional auto-swap. |
| Policy engine | Per-user thresholds (per-transaction, daily, monthly, absolute cap) plus a CBU whitelist fast-path. Operations under the threshold execute automatically; above it, the owner approves via WhatsApp or Telegram. |
| REST API | JWT-authenticated HTTP endpoints for account management, payouts, thresholds, and webhook configuration. |
| MCP server | POST /mcp — a JSON-RPC 2.0 (Streamable HTTP) endpoint exposing every nuez capability as an MCP tool, authenticated via OAuth 2.1 (interactive clients) or a raw API key/JWT (programmatic ones). |
| CLI | @nuez-app/cli — a thin wrapper that calls the same MCP tools and REST endpoints from the terminal. |
Who is it for?
Section titled “Who is it for?”- Developers building AI agents that need to move money, issue cards, or pay bills in Argentina
- AI agents (Claude, Cursor, custom frameworks) that need a payment tool they can call directly over MCP
- Agencies and freelancers automating recurring payments on behalf of clients
Current status
Section titled “Current status”nuez is in private beta, running against sandbox rails. The REST API lives at https://sandbox-api.nuez.app, the MCP endpoint at https://sandbox-mcp.nuez.app, and the dashboard at https://sandbox.nuez.app. There is no separate “live” key prefix — all API keys look the same (nz_...); which environment they hit depends entirely on the base URL you point at.
Where to go next
Section titled “Where to go next”- How it works — architecture and the two execution flows
- Quickstart — connect nuez to Claude Desktop in a few minutes
- Sandbox — sign up and connect an agent through
sandbox.nuez.app, no API key needed - Policy engine — the exact rules evaluated on every payout