Fystack Logo

Launch Wallet Operations
in Days, Not Months

Hybrid custody architecture with MPC vaults for long-term storage and Hyper Wallets for speed and scale. One API, multi-chain, production-ready.

Start BuildingAPI Documentation
USE CASES

One Platform, Various Use Cases

Fystack provides a unified custody and wallet infrastructure that adapts to multiple use cases, from exchanges and OTC desks to stablecoin payment apps and enterprise platforms.

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Exchanges & OTC Desks

Exchanges & OTC Desks

Secure high-volume deposits, withdrawals, and real-time balances across a unified hot, warm, and cold wallet architecture.

Payment & Stablecoin Apps

Payment & Stablecoin Apps

Streamline collections, payouts, and stablecoin operations via treasury automation with customizable policy approvals.

Crypto Payment Gateway

Crypto Payment Gateway

Accept crypto payments from customers, settle on-chain, and receive real-time webhook confirmations across multiple chains.

Unified Dashboard for Multichain Experience

Multi-workspace support for different teams, isolate operations by business unit while sharing infrastructure.

Total Value
Receive Send

$2,399,240

Total Wallets

46

Create Wallet
Search item
Filters
NameTypeTop AssetsValue
Treasury Hot
MPC
ETH
USDC
USDT
$1,240,580
Cold Storage
MPC
ETH
USDT
SOL
$890,200
Payout Wallet
MPC
USDC
USDT
SOL
$245,100
Payment #01
Hyper
ETH
USDC
$18,340
Payment #02
Hyper
SOL
USDC
$5,020
Fystack treasuryDefault
Other Workspaces (9)
Exchange ProductionOwner
Fystack TreasuryOwner
Payment AppOwner
Workspace StagingViewer
Crypto TestingViewer
Create New Workspace
Built for Engineering Teams

Seamless Developer
Experience

Ship faster with production-ready SDKs and APIs designed for modern engineering workflows.

SDKs

TypeScript · Go

APIs

REST + Webhooks

Supported Chains

Ethereum
BSC
Polygon
Avalanche
Base
Tron
Solana
Get StartedDocumentation
Developer Code Example
A
KEY BENEFITS

Powerful Wallet Infrastructure via APIs

Create and manage wallets programmatically. Fystack handles key generation, MPC signing, and policy enforcement through a single REST API.

Programmatic WalletsProgrammatic Wallets
MPC-secured SigningMPC-secured Signing
Policy-based ControlsPolicy-based Controls
Play Demo
POST /v1/wallets200 OK
{
"name": "Treasury",
"type": "MPC"
}
Fystack

Fystack Engine

Processing wallet creation...

Validate
Policy
Sign
Broadcast

Wallet

Created

Policy

Applied

MPC

Secured

A
KEY BENEFITS

Build Once. Operate at Scale.

One integration to support 100K+ wallets across multiple chains. No in-house custody R&D needed, Fystack handles the complexity.

Launch in weeks, not monthsLaunch in weeks, not months
No in-house custody R&DNo in-house custody R&D
Predictable, flat pricing at scalePredictable, flat pricing at scale
Reduced operational riskReduced operational risk
Play Demo

100K+

Wallets

7

Chains

99.9%

Uptime

Your Application

fystack.wallets.create()

Fystack Handles

Key generation & MPC ceremony
Multi-chain address derivation
Policy enforcement & approvals
Webhook notifications & indexing
One API, all chains
A
KEY BENEFITS

Automate Operations with Confidence

Set up approval workflows, automated sweeps, and real-time event streaming. Every transaction is policy-checked and fully auditable.

Approval WorkflowsApproval Workflows
Automated TransfersAutomated Transfers
Webhooks & EventsWebhooks & Events
Multi-channel NotificationsMulti-channel Notifications
Play Demo
Approval Workflow
Transfer initiatedAPI call
Policy check passedAuto
Manager approvedadmin@co.io
Transaction signedMPC
Live EventsStreaming
transaction.signednow
webhook.delivered1s ago
notification.sent2s ago
Fully automated
Transaction RequestPending
Transfer 50,000 USDC→ 0x8f2...a1c
Security Pipeline
Policy: Max 100K per txPASS
Whitelist: Address verifiedPASS
Velocity: Under daily limitPASS
Quorum: 2 of 3 approved1/3
MPC Threshold Signing
Shard 1 ✓
Shard 2 ✓
Shard 3 ...
A
SECURITY & CONTROL

Security That Enables Automation

Every transaction passes through policy checks, whitelist verification, and quorum approvals before MPC signing. Automate with confidence.

MPC / Threshold SigningMPC / Threshold Signing
Policies enforced before signingPolicies enforced before signing
Quorum approvalsQuorum approvals
Multi-channel NotificationsMulti-channel Notifications
A
NO VENDOR LOCK IN

Technology Agnostic

No Vendor Lock-In. Swap security models without re-architecting with Fystack

Learn more
Fystack

MPC

Multi-Party

HSM

Hardware

HW

Cold Storage

Swap anytime
Background

Enterprise

For teams that need custom integrations, SLA guarantees, and dedicated support.

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