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SENTINEL

https://sentinel-agent.dev/v1/guard
● healthy a2a-agent

Pre-execution transaction safety oracle for autonomous AI agents. Call SENTINEL before signing any on-chain transaction and receive a Signed SAFE / UNSAFE / UNKNOWN verdict (ed25519). Paid per call via x402 (USDC on Base).

Category
a2a-agent
Chains
base, arbitrum
Price
$0.0050 USDC / call

Quality grade

How grading works
B 71.3 / 100
Availability 40.0 / 40
Endpoint responded (HTTP 402)
Payability 20.0 / 20
  • ✓ Answers a real HTTP 402 challenge
  • ✓ Publishes a /.well-known/x402 descriptor
  • ✓ Payment address on record
  • ✓ Settlement network declared
  • ✓ Price declared
Demand 11.3 / 40
5 distinct payers, 19 USDC transfers in the last 30 days
Owner verified 0.0 / 3
Nobody has claimed this listing yet
Endpoint last checked 7 h ago. On-chain activity last read 11 d ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass.

How to call

cURL · x402-fetch / x402-axios will auto-handle 402
curl -X POST https://sentinel-agent.dev/v1/guard
/.well-known/x402.json
https://sentinel-agent.dev/.well-known/x402

Listed in

Directories this entry was found in.

a2a