PaySentinel — the AI purchasing agent with a spending firewall

1 · Give the agent a mission

Mission

Hard budget (USD)

Planner: built-in offline planner (no setup). Add an AI key in Settings to use a live LLM — the firewall treats its output as untrusted either way.

2 · Agent's proposed cart

Item	Qty	Unit price	Line total	Why the agent picked it
No plan yet — give the agent a mission.
Total			$0.00

3 · Spending firewall verdict

Waiting for a cart…

4 · Pay with PayPal (sandbox)

PayPal buttons unlock only when the firewall approves the cart.

5 · Audit trail

Settings

PayPal sandbox Client ID AI endpoint (OpenAI-compatible) AI API key (stored only in your browser) AI model

Everything runs in your browser. The AI key never leaves this page except to the endpoint you configured. PayPal runs in sandbox mode — no real money moves.