We architect, develop, and deploy custom smart contracts that power your token, DeFi protocol, or NFT project. Our process ensures security-first development with formal verification and comprehensive audits before mainnet deployment.
LABS
Services
Payment API Development for Businesses
Developer-friendly REST and WebSocket APIs that abstract blockchain complexity, allowing your business to easily send and receive tokenized asset payments.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3 experts.
- Token Systems:
ERC-20,ERC-721,ERC-1155with custom minting, vesting, and governance logic. - DeFi Protocols: Automated market makers, lending/borrowing pools, staking mechanisms, and yield optimizers.
- Enterprise Logic: Multi-signature wallets, supply chain tracking, and automated escrow services.
We deliver battle-tested contracts that reduce audit cycles by 40% and eliminate critical vulnerabilities before launch.
Our engineers use OpenZeppelin standards and Hardhat/Foundry frameworks to ensure gas efficiency and upgradability via transparent proxy patterns. From initial spec to final audit report, we own the full development lifecycle.
key-features-cards
ENTERPRISE-GRADE PAYMENT INFRASTRUCTURE
Core API Capabilities We Deliver
Our modular API suite provides the foundational building blocks for secure, scalable, and compliant blockchain-based payment systems. We handle the complexity so you can focus on your product.
01
Multi-Chain Payment Gateway
Single API for processing payments across Ethereum, Polygon, Solana, and other major L1/L2 networks. Supports native tokens, stablecoins, and ERC-20/SPL assets with unified settlement reporting.
15+
Supported Chains
< 2 sec
Avg. Confirmation
02
Real-Time On/Off-Ramp
Seamless fiat-to-crypto and crypto-to-fiat conversion via integrated partners. Features KYC/AML compliance, fraud detection, and customizable settlement rules for global markets.
150+
Countries
40+
Fiat Currencies
03
Smart Contract Wallets & Automation
Deploy programmable, non-custodial smart contract wallets (ERC-4337 Account Abstraction) with batch transactions, gas sponsorship, and automated payment scheduling for subscriptions.
~40%
Gas Savings
ERC-4337
Standard
04
Compliance & Risk Engine
Built-in transaction monitoring for sanctions screening, AML, and regulatory reporting. Real-time risk scoring and audit trails designed for FinTech compliance teams.
99.9%
Uptime SLA
SOC 2
Compliance
05
Webhook & Event System
Reliable, low-latency webhooks for payment confirmations, failed transactions, and balance changes. Includes retry logic, dead-letter queues, and full event history.
< 100ms
Event Latency
99.99%
Delivery Rate
benefits
MEASURABLE RESULTS
Business Outcomes: Faster Integration, Lower Costs
Our Payment API is engineered to deliver concrete, quantifiable advantages. We focus on reducing your time-to-market and total cost of ownership, allowing your team to focus on core business logic.
01
Rapid API Integration
Get your payment gateway live in under 2 weeks with our comprehensive SDKs, detailed documentation, and dedicated technical support. We handle blockchain complexity so you don't have to.
< 2 weeks
Time to Live
5+
SDK Languages
02
Predictable, Lower Transaction Costs
Benefit from our aggregated liquidity and optimized gas strategies. We provide real-time fee estimation and batch processing to minimize your per-transaction costs and eliminate surprises.
Up to 40%
Gas Cost Reduction
$0.01+
Avg. Fee Per Tx
03
Enterprise-Grade Reliability
Built on a multi-chain, fault-tolerant architecture with automated failover. We guarantee 99.9% uptime SLA and sub-second finality for payment confirmations, ensuring business continuity.
99.9%
Uptime SLA
< 1 sec
Avg. Finality
04
Reduced Compliance & Security Overhead
Leverage our SOC 2 Type II compliant infrastructure and pre-vetted smart contract libraries. We manage regulatory complexities and security audits, significantly reducing your internal compliance burden.
SOC 2
Compliance
100%
Audited Code
The Infrastructure Decision
Build vs. Buy: Why a Custom API Beats Generic Solutions
A detailed comparison of the total cost, risk, and time investment between developing a payment API in-house versus partnering with Chainscore Labs for a custom, production-ready solution.
| Factor | Build In-House | Generic API Provider | Chainscore Custom API |
|---|---|---|---|
Time to First Transaction | 6-12 months | 1-2 weeks | 4-8 weeks |
Initial Development Cost | $150K - $400K+ | $0 - $10K (setup) | $50K - $150K |
Security & Audit Burden | High (your responsibility) | Medium (shared risk) | Low (we guarantee it) |
Custom Business Logic | Full control | Not possible | Built to spec |
Multi-Chain Support | High complexity | Limited selection | Ethereum, Polygon, Arbitrum, Base, Solana |
Compliance & KYC/AML | Your team builds | Basic templates | Integrated, customizable flows |
Ongoing Maintenance & Updates | 2-3 FTEs annually | Vendor roadmap | Included in SLA |
Settlement Finality | You engineer it | Network dependent | < 2 seconds (optimized) |
Uptime & Support SLA | Your team's burden | 99.5% (shared) | 99.9% (dedicated) |
Total Cost of Ownership (Year 1) | $200K - $500K+ | $15K - $50K + risk | $75K - $200K (predictable) |
how-we-deliver
PREDICTABLE, TRANSPARENT, AND CLIENT-FOCUSED
Our Delivery Process: From Specification to Production
We follow a structured, milestone-driven approach designed for technical founders and product managers. This ensures clear communication, predictable timelines, and a final product that aligns perfectly with your business logic and compliance requirements.
01
Discovery & Specification
We start with a deep technical dive to understand your business model, target markets, and compliance landscape. We deliver a detailed technical specification document covering architecture, token standards (ERC-20, ERC-721), and regulatory considerations.
1-2 weeks
Typical Duration
100%
Alignment Guarantee
02
Architecture & Smart Contract Development
Our engineers build the core payment logic using Solidity 0.8+ and OpenZeppelin libraries. We focus on gas efficiency, security patterns, and upgradability from day one. All contracts are developed with comprehensive unit and integration tests.
OpenZeppelin
Security Standard
100%
Test Coverage
03
Security Audit & Penetration Testing
Every payment module undergoes rigorous internal review followed by an external audit from a top-tier firm like CertiK or Quantstamp. We provide a detailed vulnerability report and implement all critical fixes before proceeding.
CertiK / Quantstamp
Audit Partners
0
Critical Issues at Launch
04
API Layer & Integration
We build a robust, documented REST/WebSocket API layer that abstracts blockchain complexity. This includes webhook systems for transaction status, merchant dashboards, and seamless integration with your existing backend.
REST & WebSocket
API Protocols
< 100ms
Typical API Latency
05
Staging Deployment & Client Testing
Your payment system is deployed to a staging environment on a testnet (Sepolia, Mumbai). We provide full access for your team to conduct UAT, simulate payment flows, and validate all business logic before mainnet launch.
Testnet
Deployment Environment
Full Sandbox
Client Access
06
Mainnet Launch & Production Support
We manage the secure mainnet deployment, including multi-sig wallet setup and initial liquidity provisioning. You receive 24/7 monitoring, alerting, and SLA-backed support with a 99.9% uptime guarantee for the API layer.
99.9%
Uptime SLA
24/7
Monitoring & Support
From Kickoff to Production
Typical 6-Week Delivery Timeline
A structured, milestone-driven delivery plan for a secure, production-ready payment API.
| Phase & Milestone | Week 1-2 | Week 3-4 | Week 5-6 |
|---|---|---|---|
Discovery & Architecture | Requirements & API spec finalized | ||
Core Development | Smart contract development begins | API gateway & webhook system built | |
Security & Testing | Internal audit & unit testing | Third-party audit & penetration testing | |
Deployment & Integration | Staging environment setup | Mainnet deployment & client integration | |
Launch Support | Go-live monitoring & documentation handoff |
Payment API Development
Frequently Asked Questions
Get clear answers about our process, timelines, security, and support for building enterprise-grade crypto payment APIs.
We deliver production-ready payment APIs in 2-4 weeks for standard integrations. Complex multi-chain or high-frequency trading features may extend to 6-8 weeks. Our agile process includes weekly demos, ensuring you see progress and can provide feedback throughout development.
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