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Free 30-min Web3 Consultation
Book Consultation
Smart Contract Security Audits
View Audit Services
Custom DeFi Protocol Development
Explore DeFi
Full-Stack Web3 dApp Development
View App Services
Free 30-min Web3 Consultation
Book Consultation
Smart Contract Security Audits
View Audit Services
Custom DeFi Protocol Development
Explore DeFi
Full-Stack Web3 dApp Development
View App Services
Free 30-min Web3 Consultation
Book Consultation
Smart Contract Security Audits
View Audit Services
Custom DeFi Protocol Development
Explore DeFi
Full-Stack Web3 dApp Development
View App Services
LABS
Services

StarkNet ZK Credit Verification

Implement a privacy-preserving credit verification system using StarkNet's Cairo language and zero-knowledge proofs. We build the infrastructure for users to prove creditworthiness without exposing sensitive transaction history.
Chainscore © 2026
overview
SECURE & AUDITED

Custom Smart Contract Development

Production-ready smart contracts built with enterprise-grade security and gas optimization.

We architect and deploy custom smart contracts for DeFi, NFTs, and enterprise applications. Our process ensures secure, auditable, and maintainable code from day one.

  • Security-First Development: Built on Solidity 0.8+ with OpenZeppelin libraries and formal verification patterns.
  • Gas Optimization: Every contract is profiled and optimized for up to 40% lower transaction costs.
  • Full Audit Trail: Includes comprehensive unit/integration tests and a pre-audit review for major firms like CertiK or Quantstamp.

Deliver a secure, audited MVP in as little as 2-3 weeks, not months.

We handle the entire lifecycle:

  • Architecture & Design: Token standards (ERC-20, 721, 1155), custom DeFi logic, and upgradeability patterns.
  • Development & Testing: Full test suite with Hardhat or Foundry, covering edge cases and attack vectors.
  • Deployment & Verification: Mainnet deployment with multi-sig setup and source code verification on Etherscan.
key-features-cards
ZK-POWERED INFRASTRUCTURE

Core Technical Capabilities

Our StarkNet-based credit verification system delivers enterprise-grade security, speed, and scalability. We build with provable outcomes, not just promises.

01

Zero-Knowledge Proof Generation

We develop custom Cairo smart contracts that generate succinct ZK proofs for sensitive credit data. This enables verification of financial history without exposing the underlying data, ensuring user privacy and regulatory compliance.

Cairo 1.0
Language
StarkNet
L2 Protocol
02

On-Chain Identity & Attestation

Implement secure, non-transferable Soulbound Tokens (SBTs) to represent verified credit identities. We integrate with decentralized identity protocols to create a portable, user-owned credit profile.

ERC-721/1155
Token Standard
SBT-Based
Architecture
03

Off-Chain Data Oracles

Build secure, low-latency oracle services that fetch and attest to traditional credit data (e.g., FICO, bank statements) for on-chain verification. Our oracles are designed for high availability and tamper resistance.

< 5 sec
Data Latency
Multi-Source
Validation
04

Gas-Optimized Contract Architecture

Engineer StarkNet contracts with Cairo-specific gas optimization patterns. We reduce transaction costs by up to 90% compared to naive implementations, making on-chain credit checks economically viable.

90%+
Cost Reduction
Cairo Native
Optimization
05

Security-First Development

All smart contracts undergo rigorous audits following OpenZeppelin standards. We implement formal verification for critical logic, providing mathematical guarantees of correctness for your credit verification system.

Formal Verification
Method
OZ Standards
Compliance
EXPLORE
06

Scalable API & Integration Layer

Deploy a robust backend API layer that handles proof generation requests, manages oracle data feeds, and provides simple endpoints for your dApp or traditional application to query verification status.

REST/GraphQL
API Protocols
99.9% SLA
Uptime
benefits
DELIVERABLES

Business Outcomes for Your Platform

Our StarkNet ZK Credit Verification service delivers concrete, measurable results that accelerate your go-to-market and build user trust.

01

Zero-Knowledge Proof Integration

Seamlessly integrate ZK-SNARKs/STARKs to verify creditworthiness without exposing sensitive user data. Built with Cairo 1.0 for StarkNet compatibility.

100%
Data Privacy
Cairo 1.0
Protocol
02

On-Chain Credit Scoring Engine

Deploy a custom, auditable scoring algorithm that processes off-chain data (e.g., bank statements, transaction history) to generate a verifiable on-chain score.

< 5 sec
Score Generation
Audited
Algorithm
03

Regulatory Compliance Framework

Architecture designed for GDPR, CCPA, and future financial regulations. Implements data minimization and user consent verification as on-chain attestations.

GDPR/CCPA
Compliance
On-Chain
Attestations
04

Scalable Verification Oracle Network

A decentralized oracle service for fetching and attesting to real-world credit data with cryptographic guarantees, ensuring data integrity and high availability.

99.9%
Uptime SLA
Sub-second
Data Fetch
05

Developer SDK & APIs

Comprehensive TypeScript/Python SDKs and REST APIs to integrate credit verification into your dApp or DeFi protocol in days, not months.

< 2 weeks
Integration Time
Full SDK
TypeScript/Python
EXPLORE
06

End-to-End Security Audit

Your entire verification stack—smart contracts, oracles, and ZK circuits—receives a comprehensive security review from our partner auditors before mainnet deployment.

Certified
Security Partner
Pre-Mainnet
Audit Delivery
Compare Implementation Tiers

StarkNet ZK Credit Verification Packages

A detailed comparison of our service packages for deploying private, on-chain credit verification using StarkNet's zero-knowledge proofs.

Feature / SpecificationStarterProfessionalEnterprise

ZK Circuit Design & Development

Smart Contract Audit (by 3rd Party)

Basic Review

Full Audit

Full Audit + Formal Verification

Cairo 1.0 Integration

Standard Library

Custom Optimizations

Bespoke Circuit Logic

Deployment Support

Mainnet Only

Testnet + Mainnet

Multi-Chain (StarkNet, zkSync)

Ongoing Maintenance & Upgrades

6 Months

12 Months

24 Months SLA

Response Time SLA

48 Business Hours

24 Business Hours

4 Business Hours

Dedicated Technical Account Manager

Custom Oracle & Data Feed Integration

Compliance & Regulatory Review

Basic Framework

Full Advisory

Estimated Implementation Timeline

6-8 Weeks

8-12 Weeks

Custom

Starting Price

$25,000

$75,000

Custom Quote

how-we-deliver
PROVEN METHODOLOGY

Our Development Process

A transparent, security-first approach to building your StarkNet ZK Credit Verification system. We deliver production-ready infrastructure with clear milestones and expert oversight.

01

Architecture & Design Sprint

We define your zero-knowledge proof logic, data attestation flows, and smart contract architecture in a collaborative 2-week sprint. This ensures your system is scalable, compliant, and cost-effective from day one.

2 weeks
Design Phase
100%
Requirements Locked
02

ZK Circuit Development

Our Cairo experts build custom STARK circuits for credit score verification. We implement privacy-preserving proofs that validate financial data without exposing sensitive user information on-chain.

Cairo 1.0
Language
Audited
Security Focus
03

Smart Contract Deployment

Deployment of verifier contracts and on-chain logic to StarkNet Mainnet. We handle gas optimization, upgradeability patterns, and integration with your existing front-end or API layer.

StarkNet
Mainnet
OpenZeppelin
Standards
04

Security Audit & Pen Testing

Every circuit and contract undergoes rigorous internal review followed by a formal audit with our partner security firms. We deliver a final audit report and remediation before launch.

2+ Audits
Per Component
0 Critical
Guarantee
EXPLORE
05

Integration & API Launch

We provide a fully documented REST/GraphQL API for your application to generate and verify proofs. Includes SDKs, sample code, and dedicated support for your engineering team.

< 1 sec
API Latency
24/7
Support SLA
06

Monitoring & Maintenance

Post-launch, we offer ongoing monitoring of proof generation costs, contract health, and system performance. Optional retainer includes protocol upgrades and feature enhancements.

99.9%
Uptime SLA
Proactive
Alerts
security-approach
CORE SERVICE

Smart Contract Development

Secure, production-ready smart contracts built by Web3 experts to power your protocol.

We architect and deploy custom smart contracts for DeFi, NFTs, DAOs, and enterprise applications. Our development process ensures security-first design, gas optimization, and full audit readiness from day one.

Deliver a battle-tested, mainnet-ready contract suite in 4-8 weeks, not months.

  • Protocols & Standards: ERC-20, ERC-721, ERC-1155, ERC-4626, custom DeFi logic.
  • Security: Built with OpenZeppelin, formal verification, and comprehensive unit/integration testing.
  • Delivery: Full suite including source code, deployment scripts, and technical documentation.
StarkNet ZK Credit Verification

Frequently Asked Questions

Get clear answers on our development process, security, and timelines for building private credit verification systems on StarkNet.

A standard, production-ready system with core verification logic and a basic frontend typically deploys in 4-6 weeks. Complex integrations with existing KYC providers, custom scoring models, or multi-chain attestations can extend this to 8-12 weeks. We provide a detailed project plan with weekly milestones after the initial discovery phase.

ENQUIRY

Get In Touch
today.

Our experts will offer a free quote and a 30min call to discuss your project.

NDA Protected
24h Response
Directly to Engineering Team
10+
Protocols Shipped
$20M+
TVL Overall
NDA Protected Directly to Engineering Team
StarkNet ZK Credit Verification | Chainscore Labs | ChainScore Guides