why use chainId=137 response {"success":false,"error":"Internal Server Error","message":"Parse Error"}

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why use chainId=137 response {"success":false,"error":"Internal Server Error","message":"Parse Error"}

request url: https://ethereum-api.xyz/account-balance?address=0xd98085390a9b6aa643d20cc185533d1914cb2705&chainId=137

but i use chainId=1 is valid

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@pedrouid