Securing Your RPC Endpoints: Guide to Whitelisting Best Practices
In the Web3 ecosystem, RPC endpoints serve as the critical infrastructure connecting your decentralized applications to blockchain networks. As a developer, ensuring these endpoints are properly secured is just as important as building your application's core functionality. We've seen too many promising projects compromised by overlooked security basics—let's change that narrative.
The Stark Reality of Unsecured RPC Endpoints
Every day, unsecured endpoints lead to:
- Unauthorized usage draining team resources
- Spam attacks degrading performance for legitimate users
- Exploits that can tarnish your project's reputation
- Unexpected costs from abused API quotas
The solution? Implementing proper access controls through whitelisting. Here's how to do it right.
Domain Whitelisting: Securing Frontend Interactions
When to use: Perfect for web-based dApps where users interact via browser.
Real-world scenario: Your DeFi platform at app.mydefiproject.com needs to communicate with your RPC endpoint.
Without restrictions, any website could embed scripts that abuse your endpoint.
Implementation Guide (with Startale Cloud Services)
１. Navigate to your endpoint settings
- Access your Node RPC endpoint Detail page
- Select "Your Endpoint" in the header
- Locate the Whitelist section (visible for Admin users on Growth/Business plans)
２. Configure domain restrictions
- Toggle "Restrict to specific Domain" to ON
- Enter authorized domains (e.g., app.mydefiproject.com)
- Add optional descriptions for team reference
- Click "Add" then "Save" to apply changes
Pro Tip: Always test with a staging domain before applying to production.
IP Whitelisting: Locking Down Backend Access
When to use: Essential for server-to-server communication and internal tools.
Real-world scenario: Your indexer service running on a dedicated server at _203.0.113.45 _needs exclusive RPC access.
Implementation Guide
１. Switch to IP restrictions
- In the Whitelist panel, select the "IP Addresses" tab
- Toggle "Restrict to specific IP address" to ON
２.Add trusted IPs
- Enter IPv4/IPv6 addresses (e.g., 203.0.113.45)
- Include descriptions like "Production Indexer - AWS us-east-1"
- Click "Add" then "Save"
Critical Note: For dynamic IPs, consider VPN endpoints or use our API to programmatically update whitelists.
Why This Matters to you
In traditional web applications, centralized servers can implement complex authentication. Web3's decentralized nature makes endpoint security even more critical—your RPC gateway is often the first line of defense.
By implementing proper whitelisting:
- You prevent resource abuse that could degrade performance
- You maintain predictable costs by eliminating unauthorized usage
- You build trust with your users through demonstrated security
Getting Started with Startale Cloud Services
Our platform makes whitelisting straightforward:
- Intuitive UI for managing access controls
- Detailed access logs for security audits
- Scalable infrastructure that grows with your project
But it's not just about security—we’re also built for speed.
Our RPC nodes deliver industry-leading performance, and we’re proud to offer the lowest-latency RPC infrastructure on Soneium.
Want to know why top builders trust us?
👉 Read the blog: Three Reasons Startale Cloud Services is the Best RPC Provider on Soneium
Final Thoughts
Security isn't a feature—it's the foundation. In the fast-moving Web3 space, taking the time to properly secure your infrastructure pays dividends in reliability, cost control, and user trust. Whitelisting is just the first step in building a robust security posture, but it's one that separates professional-grade projects from vulnerable experiments.
Ready to secure your endpoints? Get started with Startale Cloud Serivces Today!