Quick Facts
- MetaMask currently offers the ability for developers to create custom RPC networks that do not require setup via config
- Custom rpc networks can be used to serve users on specific chains without having to create a dedicated webstore
- For the user to add a custom RPC network, it must be a JSON rpc object matching the type of rpc data coming from a blockchain
- A list of key-value pairs is provided under a main key named rpc
- The custom RPC network should have the same functionality as the default RPC, so users don’t require any configuration changes
- A user’s MetaMask app must first be linked to a supported JSON-RPC network provided as an option within it
- The user can add any valid settings to their default or trusted provider under
- Custom rpc rpc networks can be approved users as “trusted providers” by allowing them to view/interact across the user’s requests via the popup
- Custom RPC networks may be limited by the features available through the JSON-RPC interface specified in the
- These custom RPC networks may need to handle the possible RPC errors that MetaMask itself passes to the user (as the rpc is filtered)
Adding Custom RPC Networks to MetaMask: A Step-by-Step Guide
As a crypto enthusiast, I’ve encountered numerous situations where I need to interact with different blockchain networks. MetaMask, a popular Ethereum wallet, allows me to do just that. However, by default, it only supports a limited number of networks. In this article, I’ll share my personal experience on how to add custom RPC networks to MetaMask, giving you the freedom to explore and interact with various blockchain ecosystems.
Why Add Custom RPC Networks?
Before we dive into the process, let’s discuss why adding custom RPC networks is essential. Here are a few reasons:
- Access to new blockchain networks: By adding custom RPC networks, you can connect to blockchain networks that aren’t natively supported by MetaMask, such as Binance Smart Chain, Polygon, or Solana.
- Increased flexibility: Custom RPC networks enable you to interact with decentralized applications (dApps) built on different blockchain networks, expanding your crypto universe.
- Improved user experience: With custom RPC networks, you can switch between different networks seamlessly, without needing to create multiple wallets or accounts.
Step 1: Prepare Your MetaMask Wallet
Before adding a custom RPC network, ensure you have MetaMask installed and set up on your browser. If you’re new to MetaMask, follow these steps:
- Install MetaMask from the official website or your browser’s extension store.
- Create a new wallet or restore an existing one using your seed phrase.
- Familiarize yourself with the MetaMask interface and basic features.
Step 2: Gather Network Information
To add a custom RPC network, you’ll need the following information:
- Network Name: A descriptive name for the network (e.g., “Binance Smart Chain”).
- RPC URL: The URL of the network’s RPC endpoint (e.g., “https://bsc-dataseed.binance.org/”).
- Chain ID: A unique identifier for the network (e.g., “56” for Binance Smart Chain).
- Currency Symbol: The symbol for the network’s native cryptocurrency (e.g., “BNB” for Binance Coin).
You can find this information on the network’s official documentation or online resources.
Step 3: Add the Custom RPC Network
Now, let’s add the custom RPC network to MetaMask:
- Open MetaMask and click on the three dots in the top-right corner to access the settings.
- Scroll down to the “Advanced” section and click on “Add Network”.
- Enter the network information gathered in Step 2:
- Network Name
- RPC URL
- Chain ID
- Currency Symbol
- Click “Save” to add the network.
Example: Adding Binance Smart Chain
Let’s add Binance Smart Chain as a custom RPC network:
| Network Information | Value |
|---|---|
| Network Name | Binance Smart Chain |
| RPC URL | https://bsc-dataseed.binance.org/ |
| Chain ID | 56 |
| Currency Symbol | BNB |
Step 4: Switch to the Custom RPC Network
To start interacting with the custom RPC network, switch to it in MetaMask:
- Click on the network dropdown menu in the top-center of the MetaMask interface.
- Select the custom RPC network you added (e.g., “Binance Smart Chain”).
Tips and Considerations
When working with custom RPC networks, keep the following in mind:
- Network compatibility: Ensure the dApps you interact with are compatible with the custom RPC network.
- Security: Be cautious when adding custom RPC networks, as they may pose security risks if not properly vetted.
- Network fees: Be aware of the network fees associated with the custom RPC network, as they may differ from those on the Ethereum mainnet.
Frequently Asked Questions:
Want to connect to a custom RPC network with MetaMask? Here’s a step-by-step guide to help you do just that!
Q: What is a custom RPC network?
A: A custom RPC (Remote Procedure Call) network is a blockchain network that is not supported by MetaMask by default. Examples of custom RPC networks include private testnets, custom sidechains, or other non-standard blockchain networks.
Q: Why would I want to add a custom RPC network to MetaMask?
A: Adding a custom RPC network to MetaMask allows you to interact with the network using MetaMask’s interface. This can be useful for developers testing their own blockchain applications, interacting with private testnets, or using custom sidechains.
Q: How do I add a custom RPC network to MetaMask?
A: To add a custom RPC network to MetaMask, follow these simple steps:
- Open MetaMask and click on the account icon in the top-right corner of the browser extension.
- Click on “Settings” from the dropdown menu.
- Scroll down to the “Networks” section.
- Click on “Add Network”.
- In the “Add a network” modal, enter the following information:
- Network Name: A descriptive name for your custom network (e.g., “My Private Testnet”).
- New RPC URL: The URL of your custom RPC endpoint (e.g.,
https://my-testnet.com/rpc). - Chain ID: The unique identifier for your custom network (e.g.,
12345). - Currency Symbol: The symbol for the cryptocurrency used on your custom network (e.g.,
MTEST). - Click “Save” to add the custom network to MetaMask.
Q: What are the requirements for a custom RPC URL?
A: The custom RPC URL should point to a valid RPC endpoint that supports the Ethereum RPC API. This endpoint should be capable of handling requests and returning responses in the expected format.
Q: Can I add multiple custom RPC networks to MetaMask?
A: Yes, you can add multiple custom RPC networks to MetaMask. Simply repeat the process outlined above for each network you want to add.
Q: How do I switch between custom RPC networks in MetaMask?
A: To switch between custom RPC networks in MetaMask, click on the network dropdown menu in the top-right corner of the browser extension and select the desired network from the list.
Personal Summary
As a cryptocurrency enthusiast and trader, I’ve found that staying ahead of the curve is crucial to maximizing my trading profits. One of the most effective ways I’ve discovered to do so is by expanding my options for custom RPC networks on MetaMask. By doing so, I’ve been able to improve my trading abilities and increase my profits in a significant way.
Here’s how I use custom RPC networks on MetaMask to supercharge my trading experience:
Why Custom RPC Networks Matter
MetaMask is a popular browser extension that allows users to interact with the Ethereum blockchain. By default, MetaMask connects to the same public RPC (Reliable Peer-to-Peer Protocol) network that all other users do. While this is convenient, it also means that I’m competing with a large number of other traders and bots for blockspace, which can drive up transaction fees and slow down my trades.
How to Add Custom RPC Networks on MetaMask
To take my trading to the next level, I’ve started using custom RPC networks on MetaMask. This allows me to connect to decentralized networks that are optimized for low-latency trading and have lower transaction fees.
Benefits of Custom RPC Networks
By using custom RPC networks on MetaMask, I’ve experienced several benefits that have improved my trading abilities and increased my profits. These include:
- Faster transaction times: By connecting to a custom RPC network, I can reduce my transaction times and ensure that my trades are executed quickly and efficiently.
- Lower transaction fees: Custom RPC networks often have lower transaction fees than public networks, which means I can save money on my trades.
- Greater control: By connecting to a custom RPC network, I have more control over my trading experience and can customize the network to meet my needs.
Conclusion
In conclusion, adding custom RPC networks to MetaMask has been a game-changer for my trading experience. By doing so, I’ve been able to improve my trading abilities, reduce my transaction fees, and increase my profits. I highly recommend giving it a try to take your trading to the next level.

