We architect and deploy the foundational logic for your dApp, from ERC-20 tokens and ERC-721 NFTs to complex DeFi primitives and DAO governance systems. Our code is built for security first, utilizing battle-tested patterns from OpenZeppelin and comprehensive audit readiness.
LABS
Services
Cross-Chain NFT Bridge API Development
We build robust, developer-friendly APIs and SDKs that abstract the complexity of underlying bridge protocols, enabling your application to integrate cross-chain NFT functionality in weeks, not months.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3 experts for your protocol or application.
Deliver a secure, auditable, and gas-optimized smart contract suite in 2-4 weeks.
- Custom Development: Logic for DeFi (swaps, lending, staking), NFTs (dynamic metadata, royalties), and enterprise use cases.
- Security & Audits: Development follows
SlitherandMythXbest practices; we prepare full audit packages for firms like CertiK or Quantstamp. - Integration Ready: Contracts are deployed with full testing suites, documentation, and frontend integration guides for your engineering team.
key-features-cards
ENTERPRISE-GRADE INFRASTRUCTURE
Core Capabilities of Our Bridge API
Our API delivers the robust, secure, and scalable foundation required for high-volume NFT operations across chains. We handle the complex infrastructure so you can focus on building your product.
01
Secure Asset Locking & Minting
Non-custodial, audited smart contracts for asset locking on the source chain and verifiable minting on the destination chain. Built with OpenZeppelin standards and formal verification.
100%
Non-Custodial
2 Audits
Security Verified
02
Multi-Chain Relayer Network
Decentralized, fault-tolerant relayers monitor events and submit proofs across supported chains (Ethereum, Polygon, Arbitrum, Base, etc.) with automatic failover.
> 10
Chains Supported
99.9% SLA
Relayer Uptime
03
Real-Time Status & Webhooks
Comprehensive API endpoints for bridge status, transaction history, and configurable webhooks for instant notifications on transfer success, failure, or delays.
< 2s
Event Detection
5+ Events
Webhook Types
04
Gas Optimization Engine
Intelligent gas estimation and sponsorship mechanisms to minimize end-user costs and enable gasless transactions for a seamless user experience.
Up to 40%
Gas Savings
Gasless
Optional Sponsorship
05
Comprehensive Analytics Dashboard
Monitor bridge health, volume, fees, and user activity in real-time. Export data for business intelligence and compliance reporting.
Real-Time
Metrics
Custom Alerts
Proactive Monitoring
benefits
TANGIBLE RESULTS
Business Outcomes for Your NFT Platform
Our cross-chain bridge API delivers measurable infrastructure improvements that directly impact your platform's growth, security, and user experience.
01
Expand Market Reach
Enable seamless NFT transfers between Ethereum, Polygon, Solana, and other major chains. Access liquidity and users from fragmented ecosystems without building multiple native platforms.
8+
Supported Chains
> 95%
User Retention
02
Reduce Time-to-Market
Deploy a production-ready, secure cross-chain bridge in weeks, not months. We provide a fully managed API with SDKs, eliminating the need for in-house protocol development.
< 3 weeks
Integration Time
1 API
Unified Interface
03
Enhance User Experience
Offer sub-2-minute NFT transfers with a simplified, gas-abstracted flow. Our API handles complex cross-chain messaging, wallet management, and gas estimation automatically.
< 120 sec
Average Transfer
0
Gas Complexity
04
Mitigate Security & Compliance Risk
Leverage battle-tested, audited bridge contracts and a secure relayer network. Our architecture isolates risk and provides full transaction provenance for regulatory compliance.
3+
Security Audits
100%
Uptime SLA
05
Optimize Operational Costs
Eliminate the overhead of maintaining multiple chain-specific indexers, RPC nodes, and bridge validators. Pay a predictable API fee instead of unpredictable infrastructure costs.
60%
Cost Reduction
Predictable
Pricing Model
06
Future-Proof Your Stack
Our API is built for modularity. We handle core protocol upgrades and new chain integrations, ensuring your platform stays compatible with the evolving multi-chain landscape.
Auto
Protocol Updates
Quarterly
New Chain Support
Choose Your Integration Path
Structured Development Tiers
A clear comparison of our Cross-Chain NFT Bridge API development packages, designed to match your project's scale, security requirements, and go-to-market timeline.
| Core Capabilities | Rapid Launch | Scalable Platform | Enterprise-Grade |
|---|---|---|---|
Multi-Chain Support | 2 Chains (e.g., ETH, Polygon) | 5+ EVM Chains | All EVM + Custom L2s |
Smart Contract Suite | Standard Bridge Logic | Custom Mint/Burn Logic | Advanced Royalty & Governance |
Security Audit | Automated Scan Report | Manual Review by Senior Engineer | Full Formal Verification + 3rd Party Audit |
API Endpoints & SDK | Core Transfer & Status APIs | Full Suite + Admin Dashboard | White-label SDK & Custom Integrations |
Deployment & Setup | Testnet Deployment | Mainnet Deployment Support | Multi-Region, Redundant Deployment |
Monitoring & Alerts | Basic Health Dashboard | Real-time Analytics & Alerts | 24/7 SRE Monitoring & PagerDuty |
Support & SLA | Email Support, 48h Response | Priority Slack, 24h Response | Dedicated Engineer, <4h Response |
Typical Timeline | 3-4 Weeks | 6-8 Weeks | 10-12+ Weeks |
Starting Investment | $25,000 | $75,000 | Custom Quote |
how-we-deliver
PREDICTABLE DELIVERY
Our Development & Integration Process
A structured, transparent workflow designed for technical leaders. We deliver production-ready cross-chain NFT bridge APIs with clear milestones, guaranteed SLAs, and zero surprises.
01
Discovery & Architecture Design
We conduct a deep technical audit of your existing stack and NFT standards (ERC-721/1155). We then architect a custom bridge solution, selecting optimal source/target chains (EVM, Solana, etc.) and defining the security model, gas optimization strategy, and fee structure.
1-2 weeks
Phase Duration
Detailed Spec
Deliverable
02
Smart Contract Development & Auditing
Our team builds secure, gas-optimized bridge contracts in Solidity/Rust. Every contract undergoes rigorous internal review and is prepared for submission to top-tier third-party auditors like CertiK or Quantstamp, ensuring vulnerability-free deployment.
3-4 weeks
Phase Duration
Audit-Ready Code
Deliverable
03
Relayer & API Layer Development
We build the high-availability relayer service that monitors chain events and facilitates cross-chain messaging. Simultaneously, we develop the REST/WebSocket API layer your application will integrate with, complete with comprehensive documentation and SDKs.
2-3 weeks
Phase Duration
Staging API
Deliverable
04
Staging & Security Hardening
Full deployment to a staging environment matching production specs. We execute end-to-end integration testing, load testing under peak traffic, and final security hardening. This phase includes a formal security audit with our partners.
2-3 weeks
Phase Duration
Audit Report
Deliverable
05
Production Deployment & Monitoring
We manage the mainnet deployment of all system components with zero-downtime strategies. We establish 24/7 monitoring, alerting on failed transactions and bridge health, and provide a dashboard for real-time analytics on volume, fees, and user activity.
1 week
Phase Duration
Live System
Deliverable
06
Ongoing Support & Scaling
Post-launch, we provide dedicated technical support and maintenance, including SLA-backed uptime (99.9%). We proactively manage upgrades for new chain integrations, protocol changes, and scale the infrastructure to handle your growing transaction volume.
99.9% SLA
Uptime Guarantee
24/7 Support
Included
security
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3-native engineers.
We architect, develop, and deploy custom smart contracts that are secure, gas-optimized, and tailored to your specific business logic. Our engineers specialize in Solidity and Rust, leveraging battle-tested patterns from OpenZeppelin and Solana program libraries.
Every contract undergoes a rigorous security review, with formal verification and third-party audits available to ensure enterprise-grade resilience.
- Full Lifecycle Support: From initial design and
Hardhat/Foundrytesting to mainnet deployment and upgrade management viaTransparentorUUPSproxies. - Protocol Specialization:
ERC-20,ERC-721,ERC-1155, custom DeFi vaults, staking mechanisms, DAO governance, and cross-chain bridges. - Measurable Outcomes: Reduce time-to-market by 60%, achieve 99.9% uptime post-launch, and pass security audits with zero critical vulnerabilities.
Cross-Chain NFT Bridge API
Frequently Asked Questions
Get clear answers on our development process, security, and timelines for building a production-ready cross-chain NFT bridge.
We deliver a production-ready, audited cross-chain NFT bridge API in 4-8 weeks. This includes architecture design, smart contract development, frontend/backend API integration, security audits, and deployment. For a standard two-chain bridge (e.g., Ethereum ↔ Polygon), the timeline is closer to 4 weeks. Adding more chains or complex features like batch bridging extends the timeline.
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