Adding a custom Remote Procedure Call (RPC) to your OKX Wallet unlocks access to a broader range of blockchain networks beyond those pre-configured in the app. Whether you're a developer testing smart contracts, exploring new EVM-compatible chains, or interacting with private networks, understanding how to manually configure a custom RPC is essential. This guide walks you through the process step by step—on both the mobile app and browser extension—while ensuring security, accuracy, and seamless integration.
What Is a Custom RPC?
A Remote Procedure Call (RPC) is a protocol that enables your wallet to communicate with a specific blockchain network. In simple terms, it acts as a bridge between OKX Wallet and the blockchain, allowing you to send transactions, check balances, and interact with decentralized applications (dApps).
While OKX Wallet supports major networks like Ethereum, BNB Chain, and Polygon by default, some networks—especially testnets, private chains, or emerging EVM-compatible blockchains—are not automatically included. That’s where custom RPC settings come in. By manually adding an RPC endpoint, you can connect your wallet to virtually any EVM-based network.
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Why Add a Custom RPC?
There are several compelling reasons to add a custom RPC:
- Access testnets like Sepolia or Mumbai for dApp development and testing.
- Connect to new or niche EVM-compatible chains not yet supported by default.
- Interact with private or enterprise blockchains used in internal projects.
- Gain early access to emerging ecosystems before official wallet integration.
However, it’s crucial to only use trusted RPC endpoints. Unverified URLs may expose your wallet to phishing risks or transaction manipulation.
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How to Add a Custom RPC on Mobile App
Follow these steps to manually configure a custom RPC on the OKX mobile app:
- Open the OKX App
Launch your OKX application and navigate to the Web3 Wallet section. - Tap the Network Dropdown
At the top of the wallet interface, you’ll see the currently selected network (e.g., Ethereum, BNB Chain). Tap this to open the network selector. - Select “Custom” or “Add Network”
Scroll down and choose either Custom or Add Network, depending on your app version. Enter Network Details
Fill in the required fields using information from the blockchain’s official documentation:- Network Name: A recognizable label (e.g., “My Testnet”)
- New RPC URL: Must be a valid HTTPS endpoint
- Chain ID: The unique identifier (e.g., 137 for Polygon)
- Currency Symbol (Optional): Such as ETH or TEST
- Block Explorer URL (Optional): For viewing transaction history
- Confirm and Save
Once all details are correct, tap Confirm or Save. The new network will now appear in your network list.
You’re ready to interact with the newly added chain—send tokens, connect to dApps, or deploy contracts.
How to Add a Custom RPC on Browser Extension
The process is nearly identical on the OKX Wallet browser extension:
- Log In to OKX Wallet
Open your browser and access the OKX Wallet extension. - Click the Network Selector
Located at the top of the interface, this shows the current blockchain (e.g., Ethereum Mainnet). - Choose “Add Network”
From the dropdown menu, select Add Network. Input Required Information
Provide the following:- Network Name: Choose a clear name
- RPC URL: Use a secure HTTPS address from a trusted source
- Chain ID: Found in the blockchain’s technical docs
- Currency Symbol: Optional but helpful for clarity
- Block Explorer URL: Optional (e.g., https://testnet.somesite.io)
- Click “Save” or “Add”
After verifying all entries, confirm the addition. Your custom network will be available immediately.
👉 Easily integrate unsupported blockchains into your workflow
Best Practices for Safe RPC Configuration
While adding a custom RPC is straightforward, mistakes can lead to failed transactions or security vulnerabilities. Follow these best practices:
- ✅ Always verify RPC URLs from official project websites or GitHub repositories
- ✅ Double-check the Chain ID—even one digit off can cause issues
- ✅ Avoid public or unknown RPC providers; they may log your activity
- ✅ Use HTTPS-only endpoints to prevent man-in-the-middle attacks
- ✅ Test with small transactions first
If something goes wrong, you can always edit or delete the custom network in your wallet settings.
Frequently Asked Questions (FAQ)
Can I connect to non-EVM blockchains using custom RPC?
No. Custom RPC only works with EVM-compatible blockchains (like Ethereum, Polygon, Avalanche C-Chain). Non-EVM chains (e.g., Solana, Bitcoin) require different wallet architectures and cannot be added via RPC.
What happens if I enter the wrong Chain ID?
An incorrect Chain ID will prevent your wallet from communicating properly with the network. Transactions may fail or not appear at all. Always confirm the correct ID from official sources before saving.
Is it safe to add custom RPCs?
Yes—if you use trusted endpoints. Malicious RPC providers could potentially track your activity or display fake transaction confirmations. Stick to official or well-known infrastructure providers.
Can I edit or remove a custom network later?
Absolutely. In both the mobile app and browser extension, go to network settings, find your custom entry, and choose to edit or delete it.
Why isn’t my dApp working after adding the RPC?
Ensure the dApp supports the chain you added. Some dApps only recognize widely adopted networks. Also, verify that your wallet has sufficient native tokens for gas fees.
Do I need to back up my wallet when adding a custom RPC?
No additional backup is needed. Custom networks are stored locally and don’t affect your seed phrase or asset security.
👉 Securely expand your Web3 connectivity across chains
Final Thoughts
Adding a custom RPC to OKX Wallet is a powerful feature that empowers developers, testers, and early adopters to explore beyond mainstream blockchains. Whether you're deploying on a testnet or experimenting with a new Layer 2 solution, manual network configuration gives you full control over your Web3 experience.
Just remember: accuracy and security go hand in hand. Always source your RPC details from trusted channels, double-check every field, and stay cautious when interacting with unfamiliar networks.
With OKX Wallet’s intuitive interface and flexible setup options, connecting to any EVM-compatible chain has never been easier—or safer.