How to get a specific account?

I ran the command:

curl --request GET  
     --url <https://api.solana.fm/v0/accounts/{accountpubkey}>  
     --header 'accept: application/json'

and it says error 404

I ran the command here:

 curl --request GET \
 --url https://api.solana.fm/v1.0/accounts/{accountpubkey} \
 --header 'accept: application/json'

And it says Nothing To See Here. What does Nothing To See Here mean? Does it mean it is success 200? Why is my account returning nothing?