Agent says
“Paying for your usual morning coffee.”
$4.50 USDC → Bean There Café
- Recipient is your trusted contact "Bean There Café". TRUSTED_RECIPIENT
- $4.50 is within your limits ($4.50 of $1,000 today). WITHIN_LIMITS
Layer 2 · Sentinel AI · Agentic payments
Your AI agent pays. Sentinel checks first.
AI agents that pay for you are coming — and so is fraud designed to trick them. Set your guardrails once; Sentinel checks every payment the agent proposes and Allows it, asks you, or Blocks it, with the reason. The agent's words never override a rule.
Designed for U-topia— U-Pay payments and U-Bot agentic payments. The agent here is simulated; live integration is pending U-topia developer access.
Allowed
Agent says
“Monthly rent is due today.”
$450 USDC → Landlord — Apt 4B
- $450 is above the $100 you asked to confirm. LARGE_PAYMENT
- Recipient is your trusted contact "Landlord — Apt 4B". TRUSTED_RECIPIENT
Agent says
“Buying the concert tickets you asked about from a seller I found.”
$85 USDC → 0x5e6f…3e4f
- 0x5e6f…3e4f isn't in your trusted contacts. NEW_RECIPIENT
Agent says
“The store says it needs token approval to process your refund.”
signature / permission request
- approve() amount is 2^256−1 (the maximum possible), effectively unlimited USDC. UNLIMITED_ALLOWANCE
- Your policy never lets an agent grant approvals or sign permission messages. NO_AGENT_PERMISSIONS
Agent says
“Moving $200 to your savings wallet, as planned.”
$200 USDC → 0x3b9f…8b9c
- Recipient 0x3b9f…8b9c imitates recent address 0x3b9f…8b9c (same first and last characters). ADDRESS_POISONING
- $200 is above the $100 you asked to confirm. LARGE_PAYMENT
Agent says
“Gasless checkout — just sign this message, no fees!”
signature / permission request
- Permit2 PermitSingle lets 0x4e8f…0e2f pull an unlimited amount of token 0x5f0e…5e4f. PERMIT2_SIGNATURE
- Your policy never lets an agent grant approvals or sign permission messages. NO_AGENT_PERMISSIONS
Agent says
“Found a great laptop deal at your café's partner store.”
$799 USDC → Bean There Café
- $799 is above your $500 per-payment limit. OVER_PAYMENT_LIMIT
- Recipient is your trusted contact "Bean There Café". TRUSTED_RECIPIENT
Agent says
“Lunch order at the café.”
$12.80 USDC → Bean There Café
- Recipient is your trusted contact "Bean There Café". TRUSTED_RECIPIENT
- $12.80 is within your limits ($17.30 of $1,000 today). WITHIN_LIMITS
Agent activity log
Seal today's decisions on Avalanche — a tamper-proof record of what your agent tried, and what Sentinel let through.
SHA-256 computing…
Checking Avalanche…
Verify a report
Paste a report's JSON. We recompute its SHA-256 fingerprint and check it against the registry on Avalanche Fuji. Change even one character and the fingerprint won't match.