Real-Time Security Monitoring for Layer 1 & Layer 2 Blockchains
Detect consensus faults, slashable events, and sequencer downtime before they impact users across any chain, with Guardrail’s real-time, continuous security monitoring for L1s and L2s.
Trusted by leading Web3 projects
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Prevent slashing and forks
instant alerts on double-sign events enable rapid key rotation before damage spreads.
Maintain rollup liveness
detect sequencer stalls and auto-trigger escape-hatch contracts to protect user funds.
Protect cross-chain liquidity
verify bridge proofs and halt mismatched mints within the same block.
Audits Are Just the Beginning
Over 90% of hacks happen in audited protocols after deployment.
Static audits catch code bugs pre-launch, but can't defend against the live threats that emerge in production. Guardrail provides the continuous monitoring that protects your protocol 24/7 where real attacks happen.
Why monitoring?
Layer 1 networks and rollups collectively secure more than $400 billion in assets. In 2025 alone, eight validator key compromises and four sequencer outages froze bridges and drained liquidity.
Validator key theft and double-signing
that triggers mass slashing, consensus forks, and governance crises.
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Sequencer downtime or censorship
that freezes rollup activity and blocks user exits to Layer 1.
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MEV and sandwich attacks
that exploit transaction ordering to inflate costs and undermine user
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Bridge state root mismatches
that lock assets and enable cross-layer draining of funds.
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Real-time threat monitoring is now a baseline requirement for L1s and L2s
Threat
Why it matters
Guardrail real-time monitoring
Validator Key Theft & Double-Signing
Triggers mass slashing, forks, and governance crises.
Validator behavior tracking & double-sign detection
Sequencer Downtime or Censorship
Freezes rollup activity and blocks user exits to Layer 1.
Sequencer uptime monitoring & censorship alerts
Auto-Compounding Logic Bugs
Stuck funds or irreversible disabling of vaults when automation contracts fail
Strategy execution monitoring & stuck fund detection
MEV & Sandwich Abuse
Exploits transactions, inflates costs, and undermines trust.
Mempool analysis & MEV pattern recognition
Bridge State Root Mismatch
Locks assets and enables cross-layer draining.
Cross-chain state reconciliation & asset parity checks
Client & Upgrade Bugs
Consensus failures cascade across nodes and restaking layers.
Post-upgrade monitoring & consensus divergence detection
Guards provide complete security coverage of every onchain
Pre-built Guards
Instantly set up ‘Guards’ for common attack vectors from our extensive blueprint library of 50+ ‘Guards’
Custom Guards
Custom monitoring for your unique protocol risks
Frequently asked questions
Need more information?
What is real-time monitoring for L1 and L2 blockchains?
It involves ongoing monitoring of validator actions, sequencer performance, and state proofs to identify risks early and stop them before disrupting users or draining liquidity.
How does Guardrail help prevent validator slashing?
Guardrail monitors attestations and double-signing in real time, sending instant alerts so teams can rotate keys and avoid penalties.
Can Guardrail detect sequencer downtime or censorship?
Yes. Guardrail tracks sequencer responsiveness and transaction ordering, alerting teams to stalls or suspicious censorship.
How does Guardrail secure cross-chain bridges on L1s and L2s?
It validates state roots and proofs, flagging mismatches that could freeze funds or enable draining across layers.
Get Guardrail to secure your assets onchain today
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