How to Add Custom Remote Procedure Call (RPC) Networks to OKX Web3 Wallet

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Integrating custom blockchain networks into your Web3 wallet expands access to decentralized applications, testnets, and emerging EVM-compatible chains. The OKX Web3 Wallet supports this functionality through custom Remote Procedure Call (RPC) configurations, allowing users to manually connect to networks not preloaded in the wallet interface.

Whether you're a developer testing smart contracts on a staging environment or an advanced user exploring niche EVM-based chains, understanding how to add custom RPCs empowers greater flexibility and control over your Web3 experience.

This guide walks you through the step-by-step process for both the mobile app and browser extension versions of the OKX Web3 Wallet, along with best practices for ensuring secure and reliable connections.

👉 Learn how to securely connect to new blockchain networks with just a few clicks.

What Is a Remote Procedure Call (RPC)?

A Remote Procedure Call (RPC) is a communication protocol that enables your wallet to interact with a specific blockchain network. When you initiate a transaction, check your balance, or interact with a dApp, your wallet sends requests via an RPC endpoint to retrieve data from the blockchain.

By default, wallets like OKX Web3 come with popular networks preconfigured—such as Ethereum, BNB Chain, and Polygon. However, many experimental, private, or newly launched blockchains aren’t included by default. That’s where custom RPC settings come in.

Adding a custom RPC allows you to:

⚠️ Always verify RPC endpoints from trusted sources. Using unreliable nodes can lead to inaccurate balance displays, failed transactions, or potential security risks.

Step-by-Step: Adding Custom RPC on Mobile App

If you're using the OKX Web3 Wallet mobile app, follow these steps to register a new network via custom RPC:

  1. Open the OKX Web3 Wallet app on your smartphone.
  2. Tap the network selector dropdown at the top of the main wallet screen (it usually shows “Ethereum” or another active chain).
  3. Scroll down and select “Custom” or “Add Network” from the list.

  4. Enter the required network details:

    • Network Name: A label for easy identification (e.g., “My Testnet”).
    • RPC URL: The HTTPS endpoint provided by the blockchain team or node service (e.g., https://rpc.my-chain.org).
    • Chain ID: A unique numeric identifier (e.g., 80001 for Polygon Mumbai testnet).
    • Currency Symbol (optional): Native token symbol (e.g., “MATIC”, “ETH”).
    • Block Explorer URL (optional): For viewing transaction history (e.g., https://mumbai.polygonscan.com).
  5. Confirm all details are correct, then tap “Confirm” or “Save”.

Once saved, the new network will appear in your network list and can be selected anytime.

👉 Discover how developers use custom RPCs to build and test on next-gen blockchains.

Step-by-Step: Adding Custom RPC on Browser Extension

For desktop users leveraging the OKX Web3 Wallet browser extension, here’s how to add a custom network:

  1. Open your browser and navigate to the OKX Web3 Wallet extension.
  2. Unlock your wallet using your password or connected account.
  3. Click on the current network selector at the top of the interface (e.g., currently showing “Ethereum Mainnet”).
  4. Choose “Add Network” from the dropdown menu.

  5. Fill in the following fields carefully:

    • Network Name: Assign a clear name (e.g., “Arbitrum Nova Testnet”).
    • New RPC URL: Input a valid HTTPS RPC endpoint (must start with https://).
    • Chain ID: Enter the correct integer ID (you can find this in the blockchain’s official documentation).
    • Currency Symbol: Optional, but helpful for clarity (e.g., “ARB”, “BNB”).
    • Block Explorer URL: Optional link to view on-chain activity (e.g., https://nova.arbiscan.io).
  6. After verifying all entries, click “Save” or “Add”.

Your newly configured network will now be accessible from the network switcher.

You can later edit or remove any custom RPC under Network Settings within the wallet preferences.

Key Considerations When Adding Custom RPCs

While adding custom networks enhances utility, it also comes with responsibilities. Keep these points in mind:

✅ Use Trusted Sources Only

Always obtain RPC URLs from official project websites, GitHub repositories, or verified developer documentation. Untrusted endpoints may log your activity or return false data.

✅ Verify Chain IDs Accurately

An incorrect Chain ID can cause transaction failures or even send funds to incompatible networks. Double-check against official references before saving.

✅ Monitor Performance

Some custom RPCs may suffer from latency or downtime. If transactions stall frequently, consider switching to a more stable node provider (like Alchemy, Infura, or public community-run nodes).

✅ Leverage Block Explorers

Providing a valid block explorer URL helps track transactions directly from your wallet interface—making debugging easier during development or troubleshooting.

Frequently Asked Questions (FAQ)

What is a custom RPC in OKX Web3 Wallet?

A custom RPC lets you manually configure your wallet to connect to a blockchain network not listed by default. This is useful for accessing testnets, private chains, or new EVM-compatible networks.

Can I edit or delete a custom RPC after adding it?

Yes. In both the mobile app and browser extension, you can access your saved networks under Network Settings and modify or remove them as needed.

Why isn’t my transaction going through after adding a custom RPC?

Common causes include an invalid RPC URL, wrong Chain ID, or node downtime. Ensure all details match the network’s official specifications and try refreshing or switching endpoints.

Is it safe to add custom RPCs?

It’s safe if you use trusted sources. Avoid entering sensitive information on dApps connected through unknown nodes, as malicious endpoints could potentially track your usage patterns.

Do I need technical knowledge to add a custom RPC?

Basic familiarity with blockchain concepts helps, but the process itself is user-friendly. Just ensure accuracy when entering Chain ID and RPC URL.

Can I use the same custom RPC on both mobile and extension versions?

Yes. As long as you enter identical parameters (Chain ID, URL, etc.), the configuration will work across devices and platforms.

Final Thoughts

The ability to add custom RPC networks transforms the OKX Web3 Wallet into a powerful gateway for developers and early adopters alike. From testing decentralized applications on isolated environments to engaging with cutting-edge Layer 1 and Layer 2 ecosystems, this feature unlocks broader participation in the evolving Web3 landscape.

By following best practices—verifying sources, double-checking IDs, and monitoring performance—you maintain both functionality and security while exploring beyond mainstream chains.

👉 Start connecting to innovative blockchains today—effortlessly expand your Web3 reach.

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