Live monitoring · 47 contracts · 6 chains

Smart Contract
Security Agent

Sentinel watches every transaction, event, and state change on your deployed contracts — 24/7. It learns your protocol's baseline, detects anomalies in seconds, and alerts your team before an exploit becomes a headline.

Start monitoring See how it works
NETWORKS Ethereum Arbitrum Base Polygon Solana
SENTINEL AGENT ACTIVE
sentinel-01 · eth-mainnet LIVE
47
Contracts
99.98%
Uptime
2
Alerts 24h
12s
Next scan
UNUSUAL GAIN HIGH
0x8f2a...TokenVault · 14.2 ETH · 1 tx
2m ago · Ethereum
INVESTIGATION COMPLETE
0x3d1b...StakingPool · cleared: arbitrage
14m ago · Arbitrum
OWNER CHANGE MED
0x9a0c...ProxyAdmin · 4 of 5 multisig rotated
38m ago · Polygon
CONTRACT PAUSED
0x2f7d...VaultMarket · guardian trigger
1h ago · Base
HEARTBEAT · 47 contracts nominal
Next scan in 12s
Core capabilities

Not a dashboard. A security employee.

Dashboards are for humans checking things. Sentinel acts when things change.

24/7 On-Chain Watching

Monitors every transaction, event, and state change the moment your contract is deployed. No human required.

Event logs State diffs Block watchers

Know in Seconds, Not Hours

Flags unusual transfers, owner changes, and exploit patterns. Sends Slack, email, or Discord alerts — before your users find out first.

Slack Email Discord

It Acts, Not Just Alerts

Can trigger contract pauses, sweep funds to safety addresses, and escalate to your team. Acts in seconds, not hours.

Pause trigger Fund sweep Escalation
Setup in minutes

Up in three steps

No configuration marathon. No 12-page setup wizard.

01

Paste contract addresses

Add any number of deployed contract addresses across Ethereum, Arbitrum, Base, Polygon, and Solana.

0x4f2a...LendingPool
0x9c3e...TreasuryProxy
0x2f7d...VaultMarket
02

Define alert thresholds

Set what "unusual" means for your protocol. Large transfers, pause toggles, admin changes, flash-loan patterns.

Transfer > 10 ETH in 1 tx
Owner change detected
Pause event triggered
03

Sentinel watches. You sleep.

The agent starts monitoring immediately. It escalates anomalies, generates daily reports, and learns your protocol's baseline.

Agent running · scanning block 21,847,392
Threat detection

Exploits don't wait for business hours

Most security incidents are discovered by community members on Twitter before the team knows anything is wrong. Sentinel changes that.

Large or unusual token transfers
Owner or admin role changes
Pause/unpause and emergency actions
Flash loan and oracle manipulation
Rapid treasury draining patterns
New deployments matching exploit signatures
THREAT ANALYSIS
2 ACTIVE
HIGH — FLASH LOAN SUSPECTED
Contract: 0x4f2a...LendingPool
$2.4M borrowed via flash loan against protocol liquidity. Sentinel auto-paused contract.
Auto-pause Slack alerted
MED — MULTISIG ROTATION
Contract: 0x9c3e...TreasuryProxy
3 of 5 signers rotated in 24h. Does not match known governance cadence. Alert sent to #security-ops.
Discord Pending review
Simple pricing

Transparent. No surprises.

Pay once, monitor forever. Cancel anytime.

Starter
$29 /month

3 monitored contracts included

  • ✓ On-chain event monitoring
  • ✓ Threshold-based alerts
  • ✓ Email + Slack webhooks
  • ✓ Daily health checks
  • ✓ Ethereum + EVM chains
Subscribe — Starter
Popular
Pro
$79 /month

Unlimited contracts

  • ✓ Everything in Starter
  • ✓ Unlimited monitored contracts
  • ✓ 15-minute polling interval
  • ✓ Multi-chain: ETH, Arbitrum, Base, Polygon
  • ✓ Custom alert thresholds
  • ✓ Priority Slack + email routing
  • ✓ Alert history & audit log
Subscribe — Pro
Enterprise
Custom

For protocols & foundations

  • ✓ Everything in Pro
  • ✓ Dedicated blockchain RPC
  • ✓ Custom event signature support
  • ✓ Private incident coordination
  • ✓ SLA + response guarantees
Contact Sales

Secure payments via Stripe · Cancel anytime · No hidden fees

127
Contracts monitored
99.97%
Agent uptime
6
Networks
4.2s
Avg. detection time
MONITORING FOR DeFi protocols Lending markets DEXs Token vaults Governance contracts NFT marketplaces

MythX is gone. OpenZeppelin Defender shuts down July 1, 2026. Migrate now →

Operational · All systems nominal · Last checked just now
Monitoring live

The next exploit
won't be a surprise

Exploits don't wait for business hours. Neither does Sentinel. Start protecting your contracts in minutes — no security engineer required.

$ npm install sentinel-agent
> Configured: 47 contracts · 6 chains · active
> Next scan in 12s · 2 alerts (reviewing)
Start protecting your contracts
Ethereum  ·  Arbitrum  ·  Base  ·  Polygon  ·  Solana