Why 300ms is Fatal
Fireblocks is built for custody, not execution. Using MPC for AI agent trading is like bringing a vault to a drag race.
The Latency Breakdown
Even with MPC-CMP upgrades, network physics remains the bottleneck.
The MPC Penalty
Network Hops
MPC requires multiple parties (key shares) to communicate over the network to generate a signature. Even with MPC-CMP reducing rounds from 9 to 1, the network latency between shares is irreducible physics. Packet drop = retry = 1000ms+ spike.
The Variance Tax
Network latency is inherently jittery. A strategy profitable at 50ms may be unprofitable at 700ms. This is the definition of non-deterministic execution.
Design Philosophy
Fireblocks optimizes for storage security, not execution speed. Their product is designed for institutional custody, where the key never moves. AI agents require the opposite: keys must execute instantly.
Honesty Box: When to use Fireblocks
If you hold client funds that require multi-person governance (e.g. 5-of-7 humans must approve), Fireblocks is the gold standard.
It is an excellent Vault. It is a terrible Gun. Use Fireblocks for cold storage. Use ZeroCopy for the active trading hot wallet.
The Vault and Gun Model
Fireblocks
Cold storage. Multi-party governance. Human-speed approvals.
Use for 90-95% of AUM.
ZeroCopy
Hot execution. AI-speed signing. Autonomous agents.
Use for the 5-10% that trades.
Don't choose. Use both.
The ZeroCopy Approach
AWS Nitro Enclave
Keys are generated and stored inside a hardware-isolated enclave. RAM is never exported. No network attack surface.
Zero Network Hops
Signing happens in-memory. No API calls. No REST overhead. Pure local execution.
Kernel Bypass & PGO
XDP + AF_XDP eliminate syscall overhead. Profile-Guided Optimization (PGO) ensures the binary is tuned for your specific hardware. This is how we achieve 42µs.
Hardware Kill Switch
Standard in the Validator Edition. A physical hardware-isolated kill switch to instantly revoke all signing authority without relying on the network.
The Opportunity Cost
If you're trading $10 billion in notional volume annually, and Fireblocks' latency causes you to miss just 5% of profitable trades, the cost is:
Fireblocks charges ~$18K/year for small setups, scaling to six figures for enterprise.
You're paying for the privilege of being slow.
Ready to Stop Bleeding Alpha?
Fireblocks is the right tool for custody. ZeroCopy is the right tool for execution.
If you need both, use both. But don't confuse them.