DELETE/?corsGET to the same endpoint, what do you get?
get: We encountered an internal error. Please try again. (10001) 
await env.MY_BUCKET.list("my_key")await env.MY_BUCKET.get("my_key").head()? That will not respond with your object's body. Even for .get()s, you get back a stream with your object's body that you should be able to discard, you shouldn't need to buffer the entire body in memory.head did the trick. Thanks!get: We encountered an internal error. Please try again. (10001)await env.MY_BUCKET.list("my_key")await env.MY_BUCKET.get("my_key").head().get()