We architect and build bespoke blockchain systems tailored to your specific use case, from consensus mechanisms and network architecture to node infrastructure and developer tooling. Our team delivers production-ready systems, not just proofs-of-concept.
LABS
Services
Custodial Wallet API Development
We build robust, secure APIs for custodial wallet services, enabling neobanks to offer managed tokenized asset custody to clients without handling private keys directly.
Chainscore © 2026
overview
FULL-STACK ENGINEERING
Custom Blockchain Development
End-to-end development of custom blockchains, layer-2 solutions, and protocol infrastructure.
- Custom L1/L2 Chains: Build on
Substrate,Cosmos SDK, orOP Stackwith your chosen consensus (PoS, PoA, DAG). - Protocol Development: Design and implement core protocols for DeFi, gaming, or enterprise data layers.
- Node & Validator Infrastructure: Deploy and manage high-availability, geographically distributed networks with 99.9% uptime SLAs.
- Full Lifecycle Support: From whitepaper review and economic modeling to mainnet launch and ongoing governance.
key-features-cards
ENTERPRISE-GRADE INFRASTRUCTURE
Core API Capabilities
Our Custodial Wallet API provides a secure, scalable foundation for your FinTech or Web3 application. We deliver production-ready endpoints with enterprise SLAs, allowing your team to focus on building your core product.
01
Multi-Chain Wallet Management
Create, manage, and secure user wallets across EVM chains (Ethereum, Polygon, Arbitrum) and non-EVM networks (Solana, Bitcoin). Includes hierarchical deterministic (HD) key generation and secure key storage.
15+
Supported Chains
ISO 27001
Compliant
02
Transaction Orchestration
Programmatic transaction building, signing, and broadcasting. Supports complex multi-step DeFi operations, NFT minting, and cross-chain bridging with automatic nonce management and gas optimization.
< 2 sec
Avg. Signing Time
99.9%
Success Rate
03
Real-Time Balance & Event Monitoring
Webhook-driven notifications for deposits, withdrawals, and on-chain events. Real-time balance aggregation across all supported assets and chains via low-latency indexers.
< 500ms
Event Latency
24/7
Monitoring
04
Security & Compliance Layer
Built-in risk scoring, AML screening, and fraud detection. Role-based access controls (RBAC), transaction policy engines, and audit trails for SOC 2 Type II compliance readiness.
MPC/HSM
Key Security
SOC 2
Framework
benefits
ENTERPRISE-GRADE INFRASTRUCTURE
Why Neobanks Choose Our Custodial API
Our Custodial Wallet API is engineered for regulated financial institutions, delivering the security, compliance, and operational efficiency required to launch and scale digital asset services.
01
Regulatory Compliance by Design
Built-in support for KYC/AML workflows, transaction monitoring, and audit trails. Our architecture is designed to meet FINRA, SEC, and global financial regulations, simplifying your compliance burden.
SOC 2 Type II
Certified
24/7
Audit Trail
02
Bank-Grade Security & Custody
Multi-party computation (MPC) wallets with institutional key management. Private keys are never stored in a single location, eliminating single points of failure and securing billions in assets.
MPC-TSS
Technology
$0
Insured Losses
03
Rapid Integration & Time-to-Market
Fully documented REST APIs and SDKs for seamless integration with your core banking systems. Go from contract to live pilot in weeks, not months.
< 4 weeks
To Pilot
99.9%
API Uptime SLA
04
Multi-Chain & Asset Support
Support for 50+ blockchains including Bitcoin, Ethereum, Solana, and Polygon. Manage thousands of tokens, NFTs, and DeFi positions through a single unified API.
50+
Chains
1000s
Assets
05
Scalable Transaction Engine
High-throughput engine capable of processing thousands of transactions per second with sub-second confirmation times. Automated fee optimization and non-custodial staking delegation.
1000+ TPS
Capacity
< 1 sec
Confirmation
06
Dedicated Technical Partnership
Your team gets a dedicated solutions architect and 24/7 technical support. We provide white-glove onboarding, continuous security updates, and co-development for custom features.
24/7
Support
< 15 min
Response SLA
Structured Roadmap for Custodial Wallet API
Phased Development Tiers
Choose the development path that matches your project's stage, from initial MVP to enterprise-grade deployment.
| Feature / Deliverable | MVP Launch | Growth Scale | Enterprise Grade |
|---|---|---|---|
Core Wallet API & SDK | |||
Multi-Chain Support (EVM) | Ethereum, Polygon |
|
|
Key Management | AWS KMS / GCP KMS | Dedicated HSM Cluster | Multi-Region HSM with MPC |
Transaction Types | Transfers, Swaps |
|
|
Security Audit | Automated Scan | Manual Code Review | Full 3rd-Party Audit (e.g., Quantstamp) |
Compliance Features | Basic AML Checks | Advanced Screening & Reporting | Custom Rule Engine & Regulatory Dashboard |
Support & SLA | Email Support | 24/7 Chat, 12h Response | Dedicated Engineer, 1h P1 Response |
Deployment Timeline | 4-6 weeks | 8-12 weeks | 12-16+ weeks |
Estimated Investment | $50K - $100K | $150K - $300K | $500K+ |
how-we-deliver
TRANSPARENT & PREDICTABLE
Our Development & Integration Process
A structured, client-focused methodology designed for rapid deployment and enterprise-grade security. We deliver production-ready wallet infrastructure on your timeline.
01
Discovery & Architecture Design
We begin with a technical deep-dive to define your specific requirements for multi-chain support, user roles, and compliance needs. We deliver a detailed technical specification and system architecture document.
1-2 days
Workshop
Detailed Spec
Deliverable
02
Secure Core API Development
Our team builds your custodial wallet API using battle-tested libraries and OpenZeppelin security patterns. Features include multi-sig transaction approval, real-time balance indexing, and role-based access control (RBAC).
SOC 2 Type II
Compliance
OpenZeppelin
Standards
03
Integration & Staging Deployment
We integrate the API with your existing backend and frontend applications, providing SDKs and comprehensive documentation. A full staging environment is deployed for your team to test and validate.
Comprehensive SDKs
Deliverable
Staging Sandbox
Environment
05
Production Launch & Monitoring
We manage the production deployment with zero-downtime strategies. You gain access to our 24/7 monitoring dashboard for transaction success rates, gas fees, and system health.
99.9% SLA
Uptime
Live Dashboard
Monitoring
06
Ongoing Support & Scaling
Receive dedicated technical support and proactive updates for new blockchain integrations (e.g., new L2s) and protocol upgrades. We scale infrastructure to handle your user growth.
< 1 hr
Response Time
Auto-scaling
Infrastructure
security
SERVICE
Blockchain Infrastructure
Reliable, scalable node infrastructure for production Web3 applications.
We provide managed RPC endpoints, validators, and indexers with 99.9% uptime SLAs. Deploy on EVM, Solana, Cosmos, and other major L1/L2 networks.
- Dedicated Nodes: Full archival access with zero rate limiting.
- Global Edge Network: Sub-50ms latency across 15+ regions.
- Real-time Monitoring: Dashboards for health, performance, and gas usage.
Focus on building your dApp. We handle the infrastructure complexity, security, and scaling.
Custodial Wallet API
Frequently Asked Questions
Get clear answers on our development process, security, and timelines for building a secure, scalable custodial wallet solution.
We deliver a minimum viable product (MVP) in 4-6 weeks, with full production deployment typically taking 8-12 weeks. This includes core wallet creation, multi-chain asset management, transaction processing, and admin dashboards. Complex features like institutional-grade compliance tooling or custom DeFi integrations can extend the timeline, which we scope and agree upon upfront.
ENQUIRY
Get In Touch
today.
Our experts will offer a free quote and a 30min call to discuss your project.
NDA Protected
Confidentiality24h Response
Time to ValueDirectly to Engineering Team
No Sales Fluff10+
Protocols Shipped
$20M+
TVL Overall