/v1/swap API Throwing HTTP Errors (502 and 404)

[walkjoi]

I'm encountering issues with the Uniswap Trading API (https://trading-api-labs.interface.gateway.uniswap.org/v1/swap) when trying to swap an ERC20 token pair (e.g., WETH -> USDC) on the Sepolia testnet. The API has been consistently throwing HTTP errors recently:

• 502 error yesterday
• 404 error today

I've identified that the error is thrown at the SwapTransactionAsync step when performing a classicSwap, but I can't locate the original code of the API service.

Can anyone help me with that? Really appreciate it!

[walkjoi]

The response of this API is either 502 or 404:

Leave me a message if you need the cURLs

[mikeghen]

I also have this issue, mention it in #7880.

[walkjoi]

Not exactly the same issue, but I hear you. If the backend APIs were open source or more accessible, that would really help. At least then we could try to track down the root cause ourselves instead of waiting haha