MPC Custodial Wallet

A B2B custody platform where private keys never exist as a whole. Signing runs a threshold-MPC protocol, so the key is never assembled, behind a deliberately frozen 'signing seam' so the MPC provider can be swapped without touching product code.

• Designed a frozen signing seam — the abstraction that isolates the rest of the system from the MPC engine.
• Threshold-MPC signing (Go / Taurus), EVM + Bitcoin, multi-tenant key isolation.
• Configurable per-share key storage across cloud providers.
• USD-denominated policy engine for approval limits; audited approval trail.

• Signing seam abstracts the MPC engine
• Per-share key storage split across clouds
• Policy + approval engine gates every signature