• This is Microsoft.
• He returns Webhook success with a code 200 and plaintext 1.
• He returns Webhook failure with a code 200 and a string tells its endpoint returned error 400.
• the string didn’t tell what exactly the error.
• Don’t be like Microsoft.

EDIT: Got a few details wrong since this happens a few months ago and this meme used to be on r/ProgrammerHumor. Also the proof: