When adding a custom (non-whitelisted) token, you can either type the token name into the search box or paste the token contract address directly (recommended).
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When choosing the token to import, it is strongly recommended to triple-check the token contract address to ensure that it is the correct token. As there are many copycat tokens, some of which are likely scams. Confirming that you have the correct token contract address will reduce the possibility of you buying a token that cannot be sold.
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After clicking on the token, you will be able to view its contract address, as well as open the contract directly in the block explorer. Once you confirm that the token is legitimate, read the disclaimer and click “Continue.” The token will then be added to the swap form.
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If 1inch Shield flags the custom token as risky, you will see a warning message.

*** Please, be aware that by adding a token as a custom token, you confirm that all further interactions with it are at your own risk.