I was trying to swap ETH to BUSD via direct swap on BSC . Approval on ETH was set to MAX_UINT for 0x exchange proxy on BSC, so allowance shouldn't be an issue and I made sure there was enough balance before querying

1 Answer 1


It might be an issue related to slippage as discussed here. Try adjusting the slippagePercentage parameter as discussed in the troubleshooting guide.

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