Hi, what URL should I use to POST tree data?

I tried /services/data/v33.0/sobjects/ with POST method with Json data provided in the documentation but I have the following error:

[ {

"errorCode" : "METHOD_NOT_ALLOWED",

"message" : "HTTP Method 'POST' not allowed. Allowed are HEAD,GET"

} ]

I also tried with /services/data/v33.0/sobjects/account but i receive "No such column 'records' on sobject of type Account"

Thanks in advance