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MetaMask Setup

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The Monolythium Browser Wallet comes pre-configured with all Monolythium networks — no manual setup required. Install from Chrome Web Store

This guide explains how to connect MetaMask to Monolythium networks for EVM transactions.

Prerequisites​

  • MetaMask browser extension installed
  • Access to a Monolythium RPC endpoint

Adding Monolythium Network​

Manual Configuration​

  1. Open MetaMask and click the network dropdown
  2. Select Add Network or Add Network Manually
  3. Enter the following details for your target network:

=== "Sprintnet"

FieldValue
Network NameMonolythium Sprintnet
RPC URLhttps://rpc.sprintnet.mononodes.xyz
Chain ID262146
Currency SymbolLYTH
Block Explorer URLhttps://sprintnet.monoscan.xyz

=== "Testnet"

FieldValue
Network NameMonolythium Testnet
RPC URLhttps://rpc.testnet.mononodes.xyz
Chain ID6766
Currency SymbolLYTH
Block Explorer URLhttps://testnet.monoscan.xyz

=== "Mainnet"

FieldValue
Network NameMonolythium
RPC URLhttps://rpc.mononodes.xyz
Chain ID6767
Currency SymbolLYTH
Block Explorer URLhttps://monoscan.xyz
  1. Click Save

!!! warning "Verify Before Adding" Always verify the Chain ID and RPC URL from official sources before adding a network. Incorrect chain IDs can lead to transaction failures or security issues.

Chain ID Reference​

NetworkEVM Chain ID (decimal)EVM Chain ID (hex)
Localnet2621450x40001
Sprintnet2621460x40002
Testnet67660x1A6E
Mainnet67670x1A6F

Verifying Your Connection​

After adding the network:

  1. Switch to the Monolythium network in MetaMask
  2. Your balance should show 0 LYTH (or your actual balance)
  3. The chain ID in the network details should match the expected value

To verify the RPC is responding correctly:

curl -X POST -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"eth_chainId","params":[],"id":1}' \
  https://rpc.sprintnet.mononodes.xyz

Expected response for Sprintnet:

{"jsonrpc":"2.0","id":1,"result":"0x40002"}

What MetaMask Can Do​

MetaMask on Monolythium supports:

  • Send and receive LYTH (native transfers)
  • Deploy smart contracts (Solidity)
  • Interact with contracts (ERC-20, ERC-721, etc.)
  • Sign messages (personal_sign, eth_signTypedData)
  • View transaction history (via block explorer)

What MetaMask Cannot Do​

!!! important "Staking Requires Cosmos Wallet" MetaMask cannot perform Cosmos-native operations:

  • Staking (delegate, undelegate, redelegate)
  • Governance (vote on proposals)
  • Burn transactions (MsgBurn)

For these operations, use the Monolythium Browser Wallet, Keplr, or Leap.

See Wallets for information on Cosmos wallets.

Troubleshooting​

Wrong Chain ID Error​

If you see "Chain ID mismatch" or similar errors:

  1. Remove the network from MetaMask
  2. Re-add it with the correct chain ID from the table above
  3. Verify the RPC URL is for the correct network

Transaction Stuck​

If a transaction appears stuck:

  1. Check the RPC endpoint is responsive
  2. Verify you have sufficient LYTH for gas
  3. Try resetting your account: Settings → Advanced → Reset Account

!!! note "Reset Account" Resetting your account clears your local transaction history but does not affect your on-chain balance or transactions.

RPC Not Responding​

If the RPC endpoint is not responding:

  1. Check your internet connection
  2. Try an alternative RPC endpoint if available
  3. Check the network status announcements

Security Best Practices​

  1. Verify chain IDs from official sources before transacting
  2. Double-check recipient addresses before sending
  3. Use hardware wallets (Ledger) for significant holdings
  4. Be cautious of phishing sites - always verify URLs

Next Steps​