I am making this call to get quote and estimated gas:


either if I set the gasPrice or not the API is always returning:

  "code": 105,
  "reason": "Error",
  "values": {
    "message": "CheeseSwap: K"

Note: sellToken is Elongate and works with 9 decimals.

I apprecciate you guys can help me to deal with this issue with any other token it works fine.

1 Answer 1


0x API only supports compliant ERC20 tokens, so tokens with Transfer fees (like ElonGate) are not supported.

  • ok got it thanks Jacob, and btw how do I know which kind of token has this transfer fees? or this just by evaluating the contract or something like that? Commented Feb 10, 2022 at 1:30
  • Yeah there is no standard to detect it automatically, reading the transferFrom function usually gives an indication. Commented Feb 13, 2022 at 12:23

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