Any ERC20 token can be added to your local MEW interface by following these instructions.
You will need three pieces of information to add a custom token with our interface: the contract address, decimal count, and symbol. All of this information can be found via an Ethereum blockchain explorer, like Etherscan.io or Ethplorer.io. We will show you how to find this via Etherscan.io.
Step 1. Head to Etherscan.
Step 2. If you have a balance of the token you are trying to add, search for your public address (0x…) in the search bar.
If you do not have a balance and would like to add the token before receiving it, search for the token in the search bar. Make sure you find the correct token, or you will be adding another token to your list.
There is no harm in sending your ERC20 token to your address before adding it as a custom token. In fact, this may make it easier to find via Etherscan.
Step 3. Find your token in the token balances dropdown. Select the token to be taken to a token information screen.
Step 4. Here, you will find the token’s contract address and decimal count to the right of the interface. Remember the decimal count, and click on the contract address to be taken to the token’s main screen.
Step 5. Copy this address and head back to MEW. Click ‘+ Custom Tokens’ to bring up the custom token addition screen. This option is found right next to your token balance.
Step 6. Paste the contract address into the contract address field then click 'Next' so that MEW can scan the address.
If the token's contract address is not a well know token, you will be prompted to manually enter the contract address, the icon, the token name, and the symbol.
If the token is well known, the details will pop up automatically. Please make sure to review the information to make sure they're correct.
Step 7. If the details are correct, go ahead and click 'Add token' to finalize the process.
Step 8. Congratulations! You have successfully added that token as a custom token and it should appear in your 'Tokens value' list.
“Token Already Exists!”
If you see this error, there is a simple fix for it. Re-enter your custom token information, but put a ‘2’ after the symbol. I.e. If the token’s symbol is ‘XYZ’, enter is as ‘XYZ2’.
If you still get this error after submitting it with the modified symbol, then your token is likely already a default token. Try searching the token list again for the symbol. If you see it with a balance of 0, but etherscan.io shows a balance, then you’ll likely need to change networks to another ETH node, in the upper right-hand corner.
'Contract not valid'
If you see this error, chances are that the contract address has been entered incorrectly. We recommend double-checking the contract address for the token on Etherscan to make sure the address being entered is correct.
My custom tokens are disappearing!
If your custom tokens are disappearing every time you access our interface, make sure that you do not have cache-clearing software installed (i.e. CCleaner). Your custom token information is stored locally in your browser, so this software will clear this information and require you to re-submit the token every time you access your wallet.