To retrieve statistics about a node, you can first retrieve a list of nodes in a cluster with this request:

shell> curl -u Admin:password http://10.4.2.4:8091/pools/default/buckets/default/nodes

You can send this request using the IP address and port for any node in the cluster. This sends the following HTTP request:

GET /pools/default/buckets/default/nodes HTTP/1.1
User-Agent: curl/7.21.4 (universal-apple-darwin11.0) libcurl/7.21.4 OpenSSL/0.9.8r zlib/1.2.5
Host: 10.4.2.4:8091
Accept: */*

If Couchbase Server successfully handles the request, you will get a response similar to the following example:

{"servers":[
  {"hostname":"10.4.2.6:8091",
  "uri":"/pools/default/buckets/default/nodes/10.4.2.6%3A8091",
  "stats":
      {"uri":"/pools/default/buckets/default/nodes/10.4.2.6%3A8091/stats"}}
    ....

You can then make a REST request to the specific IP address and port of given node shown in the response and add /stats as the endpoint:

shell> curl -u Administrator:password http://10.4.2.4:8091/pools/default/buckets/default/nodes/10.4.2.4%3A8091/stats

This sends the following HTTP request:

GET /pools/default/buckets/default/nodes/10.4.2.4%3A8091/stats HTTP/1.1
User-Agent: curl/7.21.4 (universal-apple-darwin11.0) libcurl/7.21.4 OpenSSL/0.9.8r zlib/1.2.5
Host: 10.4.2.4:8091
Accept: */*

If Couchbase Server successfully handles the reuqest, you will get a response similar to the following example:

{"hostname":"10.4.2.4:8091","hot_keys":[{"name":"[2012-11-05::3:47:01]"
....
"samplesCount":60,"isPersistent":true,"lastTStamp":1352922180718,"interval":1000}}

The statistics returned will be for the individual bucket associated with that node.