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Add custom EVM networks when your chain isn’t listed or to recover funds sent to the wrong network.

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Setup Process

  1. Add the network in Custom EVM networks settings
  2. Import tokens via Token list (see Manage Tokens & NFTs)
  3. Add the custom chain to your wallet
  4. Transact as you would on any EVM chain

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Add a Custom Network

  1. Go to console.mpcvault.com.
  2. Navigate to vault settings > Custom EVM networks.
  3. Click + Add a network and enter the chain details.
  4. Click Create to save.
Add Custom Network
Only add trusted RPC URLs. Reference Chainlist for verified chain and node information.

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Troubleshooting

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Transaction Not Found

The transaction may not have been broadcast yet. Use the Re-broadcast button in the signing request details.

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Transaction Failed

Usually caused by incorrect gas settings. Reference recent similar transactions on a block explorer to find appropriate values.

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”Intrinsic gas too low” Error

  1. Find your chain’s block explorer (search “[chain name] explorer”)
  2. Locate a recent successful transaction of the same type
  3. Check the Gas Limit & Usage and Gas Price fields
  4. Set your gas slightly higher than the reference values
Gas Settings Reference
Match the transaction type (Legacy or EIP-1559) when referencing gas values.
Gas Price Reference

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”Nonce too low” Error

Re-initiate with the correct nonce. The nonce starts at 0 and increments by 1 for each transaction. Check the block explorer for your wallet’s latest nonce. Nonce Reference

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Empty Gas/Nonce Fields

If fields are frequently empty, your RPC node may be unstable. Update to a more reliable RPC URL from Chainlist.