Rox Custody Overview
Rox Custody is an institutional-grade digital asset custody platform that exposes all of its core functionality, wallet management, transaction submission, and asset tracking, through a clean REST API.
What is Rox Custody?
Rox Custody is a robust platform purpose-built for financial institutions, fintechs, exchanges, and Web3 builders who need to custody digital assets on behalf of their clients without building or operating their own key management infrastructure.
At its core, Rox provides:
- Wallet management, Create, organize, and synchronize MPC wallets across 50+ blockchains
- Transaction lifecycle management, Submit, monitor, and track transactions from creation through on-chain confirmation
- Asset tracking, Real-time balance and portfolio reporting across all supported networks
- Webhook delivery, Instant event push for every state change, eliminating the need to poll
- Governance controls, Define approval workflows, spending limits, and risk rules via API
YOUR-SUBDOMAIN.api.roxcustody.com). All API calls are scoped to your subdomain, there is no shared namespace between tenants.Why Rox Custody?
Traditional custody infrastructure requires a team of cryptographers, devops engineers, and compliance specialists before you can go live. Rox collapses that to a single API integration.
MPC & Hardware Security
Multi-party computation (MPC) distributes key shards across independent nodes, your private keys are never reconstructed in a single location. Backed by hardware security modules (HSM) for tamper-proof signing.
50+ Blockchain Networks
Native support for Bitcoin, Ethereum, Solana, Cosmos, Avalanche, Polkadot, and 50+ more networks, all managed under a single API contract. Add new chains with zero code changes on your side.
Straightforward API Integration
Clean RESTful endpoints with predictable JSON responses. Integrate wallet creation, transaction submission, and asset tracking into your product in hours, not weeks.
No Counterparty Risk
Self-custody architecture means your clients maintain ultimate ownership of their assets. Rox never holds or has access to private keys, only the key shards in your deployment.
Flexible Deployment
Deploy as SaaS for the fastest path to production, on your private cloud for data residency compliance, or on-premises for full infrastructure control. All deployment modes share the same API.
Governance & Risk Controls
Define transaction approval policies, spending limits, whitelist/blacklist rules, and multi-signature workflows directly through the API. Build compliance into your custody layer, not on top of it.
Core Features
Real-time Transaction Monitoring
Every state change in the transaction lifecycle, from broadcast to confirmation, fires a webhook event instantly. No polling required.
MPC Wallet Technology
Create custodial wallets, trigger smart contract interactions, and automate signing workflows via the API. Supports EVM, UTXO, and account-based chains natively.
Transaction Tracking & Audit Trails
Query full transaction history with filtering by chain, asset, status, date range, and client. Immutable audit logs for compliance and reporting.
Platform Benefits at a Glance
| Capability | Detail |
|---|---|
Key Management | MPC threshold signatures + HSM hardware backing |
Supported Chains | 50+ blockchains including EVM, Solana, Cosmos, UTXO |
Deployment | SaaS / Private Cloud / On-Premises |
API Style | RESTful JSON over HTTPS |
Authentication | Rotating dual-token (access + refresh) |
Events | Real-time webhooks with retry (1–10 attempts) |
Governance | Policy-based approval workflows, spend limits, allow/blocklists |