Add Chain Opera Testnet to Your Wallet — MetaMask, OKX, Rabby, Trust Wallet

Testnet

Chain ID: 10066·Symbol: CO

Chain Opera Testnet is an EVM-compatible blockchain with Chain ID 10066 and native token CO. This page lets you add Chain Opera Testnet to MetaMask, Rabby Wallet, OKX Wallet or Trust Wallet in one click — no manual Chain ID or RPC entry required.

RPC Endpoints

http://40.78.123.6:8545

What is Chain Opera Testnet?

Chain Opera Testnet is an EVM (Ethereum Virtual Machine) compatible blockchain network. Any EVM wallet — MetaMask, Rabby, OKX Wallet, Trust Wallet, Coinbase Wallet — can connect and transact on Chain Opera Testnet once you add the network configuration.

Why do you need to add Chain Opera Testnet to your wallet?

MetaMask and most wallets only come pre-configured with Ethereum Mainnet. To transact, swap tokens, or use dApps on Chain Opera Testnet, you need to add the network first. Entering an incorrect Chain ID or RPC can put your assets at risk. Use the "Add to wallet" button above — data sourced directly from chainid.network, the canonical Ethereum chain registry.

How to add Chain Opera Testnet to your wallet

1
Click Add to wallet
Press the "Add to wallet" button above. MetaMask, OKX Wallet, Rabby Wallet or Trust Wallet will show a popup asking you to confirm adding the Chain Opera Testnet network.
2
Confirm in your wallet
Your wallet shows the Chain Opera Testnet network details: Chain ID 10066, native token CO. Verify the Chain ID is correct, then click "Approve" or "Add Network".
3
Switch to the new network
After confirming, your wallet automatically switches to Chain Opera Testnet. You can start transacting right away — you will need CO to pay gas fees.

Chain Opera Testnet network technical details

To add manually, go to Settings → Networks → Add Network in MetaMask (or your wallet's equivalent) and enter the details below:

NameChain Opera Testnet

Chain ID10066

Native tokenCO

Decimals18

RPC Endpointhttp://40.78.123.6:8545

Important notice

•Always verify Chain ID 10066 before confirming — attackers sometimes create fake networks with similar names but different Chain IDs
•You need CO tokens in your wallet to pay gas fees for transactions on Chain Opera Testnet
•Data on this page is sourced from chainid.network — the community-verified Ethereum chain registry
•If the "Add to wallet" button doesn't work, your wallet may not support wallet_addEthereumChain — add the network manually using the details below

Frequently asked questions

Is it safe to add Chain Opera Testnet to MetaMask?▾

Yes, if you use the "Add to wallet" button on this page. Data is sourced from chainid.network — the community-audited Ethereum registry. Adding a network does not expose your private key or grant any permissions to the dApp.

What is Chain Opera Testnet Chain ID?▾

The Chain ID of Chain Opera Testnet is 10066. This unique number identifies the network and prevents MetaMask and other EVM wallets from mixing up transactions across different chains.

Do I need CO tokens to use Chain Opera Testnet?▾

Yes. Every transaction on Chain Opera Testnet requires CO to pay gas fees. You can purchase CO on exchanges and bridge it to Chain Opera Testnet, or use a faucet if this is a testnet.

What is the Chain Opera Testnet RPC endpoint?▾

An RPC endpoint is the server address your wallet uses to communicate with the Chain Opera Testnet blockchain — sending transactions, reading balances, and checking state. One popular Chain Opera Testnet RPC is http://40.78.123.6:8545. This page shows live latency for each RPC so you can pick the fastest one.

My wallet says Chain Opera Testnet already exists when I click Add — what do I do?▾

That's completely normal. If Chain Opera Testnet is already in your wallet, it will simply switch to that network instead of adding a duplicate — no error or conflict.

I added Chain Opera Testnet but the network won't load — what's wrong?▾

The most common cause is a broken or overloaded RPC endpoint. Your wallet uses RPC to connect to the blockchain — if the RPC is down, the network won't load even if it was added correctly. Fix: copy a different RPC from the list above (prefer green low-latency ones), then go to Settings → Networks in your wallet and replace the old RPC with the new one. Watch the tutorial video above for step-by-step instructions on updating your RPC.

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