We architect and deploy custom Solidity/Rust smart contracts that form the backbone of your Web3 product. Our development process is built on OpenZeppelin standards and includes formal verification and multi-audit cycles to eliminate vulnerabilities before mainnet deployment.
LABS
Services
Non-Custodial Card Linking Infrastructure
We build the secure backend protocols and smart contracts that let your users link their debit/credit cards directly to their self-custody wallets for direct crypto purchases, with zero platform custody of funds.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built for scale and compliance.
- Custom Logic: From
ERC-20tokens andERC-721NFTs to complex DeFi protocols and DAO governance systems. - Security-First: Every contract undergoes manual review, automated analysis with
Slither/MythX, and a final audit by a top-tier third-party firm. - Gas Optimization: We reduce transaction costs by 20-40% through efficient coding patterns and storage optimization.
We deliver audited, deployable contracts in 2-4 weeks, giving you a secure foundation to build upon without technical debt.
key-features-cards
MODULAR BUILDING BLOCKS
Core Infrastructure Components We Deliver
Our battle-tested, production-ready components provide the secure, scalable, and compliant foundation for your card-linking product. Each module is designed for rapid integration and enterprise-grade reliability.
01
Secure Wallet Abstraction Layer
Seamless, non-custodial user onboarding with embedded MPC wallets. Supports social logins, session keys, and gas sponsorship to abstract blockchain complexity from end-users.
SOC 2 Type II
Compliance
Zero-Knowledge
Key Management
02
On-Chain Transaction Router
Intelligent, gas-optimized routing engine for card settlement. Dynamically selects the most efficient bridge or DEX across EVM, Solana, and other L2s to minimize costs and latency.
< 2 sec
Avg. Routing
15+ Chains
Supported
03
Real-Time Compliance Engine
Automated AML/KYC screening and transaction monitoring with configurable rule sets. Integrates with leading providers for sanctions screening and risk scoring to ensure regulatory adherence.
< 100ms
Screening Latency
Audit Trail
Full Immutability
04
Card Processor Gateway API
RESTful API layer that abstracts card network protocols (Visa/Mastercard). Handles tokenization, authorization flows, and settlement reconciliation with idempotent, id-based operations.
99.95% SLA
Uptime
ISO 8583
Protocol Support
05
Multi-Chain Settlement Ledger
Immutable, verifiable ledger for all card transactions. Provides a single source of truth for reconciliation, auditing, and real-time balance tracking across all integrated payment rails.
Sub-Second
Finality
Event-Driven
Architecture
06
Developer Dashboard & Webhooks
Comprehensive management portal for monitoring transaction health, configuring webhook endpoints for real-time notifications, and managing API keys with granular permissions.
200+ Metrics
Real-Time Dash
OpenAPI 3.0
Full Spec
benefits
STRATEGIC ADVANTAGES
Why Build Non-Custodial Card Linking
Move beyond basic payment rails. Our infrastructure delivers the technical foundation to build compliant, user-centric financial products that retain full control.
01
User Sovereignty & Trust
Users retain control of their funds and identity. This eliminates custodial risk, reduces regulatory overhead for your platform, and builds stronger trust through transparency.
0%
Custodial Liability
SOC 2 Type II
Compliance Framework
02
Seamless Fiat On-Ramp
Integrate direct bank-to-wallet funding via card linking. Reduce user drop-off with a familiar checkout flow, bypassing centralized exchanges and their associated delays.
< 2 min
Link & Fund Time
> 95%
Authorization Rate
03
Programmable Payment Flows
Build sophisticated financial logic. Trigger smart contract actions, subscriptions, or automated investments directly from card transactions, enabling next-gen DeFi and Web3 applications.
ERC-4337
Account Abstraction
Gasless
User Experience
04
Regulatory Clarity by Design
Our infrastructure is built for compliance. We handle KYC/AML orchestration, transaction monitoring, and reporting, allowing you to focus on product innovation, not legal complexity.
Global
Licensing Partners
Real-time
Sanctions Screening
05
Reduced Operational Friction
Eliminate the need to manage payment processors, reconciliation systems, and fraud tools. We provide a single, unified API for all card-linking operations and compliance.
1 API
Integration Point
2 weeks
Average Go-Live
06
Future-Proof Architecture
Built on open standards and modular components. Easily adapt to new card networks, blockchain protocols, and regulatory requirements without rebuilding your core infrastructure.
EVM & SVM
Protocol Support
PCI DSS
Level 1 Certified
Structured Onboarding for Non-Custodial Card Infrastructure
Phased Development & Integration Tiers
A modular approach to implementing secure, compliant card linking. Choose the tier that matches your launch timeline, compliance needs, and operational scale.
| Core Capability | Launch Tier | Scale Tier | Enterprise Tier |
|---|---|---|---|
Custom Smart Contract Suite | |||
On-Chain Compliance & KYC Module | Basic | Advanced | Custom |
Card Network API Integration | Sandbox | Production | Multi-Network |
Fraud & AML Monitoring Dashboard | |||
Regulatory Audit & Attestation Report | Custom | ||
Dedicated Infrastructure & RPC Nodes | |||
SLA & Incident Response Time | Best Effort | < 12 Hours | < 1 Hour |
Implementation Timeline | 4-6 Weeks | 8-12 Weeks | Custom |
Integration Support & Maintenance | 3 Months | 12 Months | 24+ Months |
Estimated Investment | $50K - $80K | $120K - $200K | Custom Quote |
how-we-deliver
CORE SERVICE
Smart Contract Development
Secure, audited smart contracts built for production by Web3-native engineers.
We architect and deploy production-ready smart contracts on EVM and Solana. Our development process is built for security and speed, delivering audit-ready code in 2-4 weeks for most MVPs.
From tokenomics to complex DeFi logic, we translate your business requirements into gas-efficient, secure on-chain code.
- Full-Stack Development:
ERC-20,ERC-721, custom DeFi protocols, and DAO governance systems. - Security-First: Built with
OpenZeppelinstandards and internal review before formal audit. - Ownership & Clarity: You receive full IP rights and comprehensive documentation.
tech-stack
ENTERPRISE-GRADE FOUNDATION
Built on Proven, Secure Technology
Our infrastructure is engineered with the security and reliability demanded by financial institutions, ensuring your card-linking service is robust, compliant, and ready to scale.
04
Real-Time Fraud Detection
Proprietary algorithms monitor transaction patterns in real-time, automatically flagging and blocking suspicious activity to prevent chargebacks and fraud.
< 100ms
Fraud Check Latency
99.7%
Accuracy Rate
05
Bank-Grade API Gateway
RESTful APIs with 99.9% uptime SLA, comprehensive documentation, and client libraries in 5+ languages for rapid integration into your existing stack.
99.9%
Uptime SLA
< 50ms
P95 Latency
Non-Custodial Card Linking
Frequently Asked Questions
Get clear answers on how our infrastructure works, from security and integration to pricing and support.
Our infrastructure provides a secure bridge between traditional payment rails and on-chain assets. We use MPC (Multi-Party Computation) wallets to generate unique, user-owned payment addresses linked to their cards. When a user makes a purchase, our system authorizes the card transaction and atomically settles the corresponding crypto payment from their non-custodial wallet, with zero exposure of private keys to us or the merchant. It's a direct, programmable payment layer that abstracts away blockchain complexity for the end-user.
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