I tried this example:

curl -G -v -H "Accept: application/json" -H "Authorization: Basic YWRtaW46YWRtaW4=" "http://localhost:8181/tsdr/metrics/query" --data-urlencode "tsdrkey=[NID=][DC=FLOWSTATS][RK=]" --data-urlencode "from=0" --data-urlencode "until=2400000000" --data-urlencode "interval=6000000" --data-urlencode "aggregation=MEAN" > test

Here, (until - from) / interval = 400

However, I still receive a thousand, non-aggregated records.

Here is the output of the curl command:

• Trying 127.0.0.1...
  % Total % Received % Xferd Average Speed Time Time Time Current
  Dload Upload Total Spent Left Speed
  0 0 0 0 0 0 0 0 -::- -::- -::- 0* Connected to localhost (127.0.0.1) port 8181 (#0)
  > GET /tsdr/metrics/query?tsdrkey=%5BNID%3D%5D%5BDC%3DFLOWSTATS%5D%5BRK%3D%5D&from=0&until=2400000000&interval=6000000&aggregation=MEAN HTTP/1.1
  > Host: localhost:8181
  > User-Agent: curl/7.45.0
  > Accept: application/json
  > Authorization: Basic YWRtaW46YWRtaW4=
  >
  < HTTP/1.1 201 Created
  < Set-Cookie: JSESSIONID=1uin4b3kbe5es4zlvlng17igc;Path=/tsdr
  < Expires: Thu, 01 Jan 1970 00:00:00 GMT
  < Set-Cookie: rememberMe=deleteMe; Path=/tsdr; Max-Age=0; Expires=Sun, 12-Jun-2016 11:36:49 GMT
  < Content-Type: application/json
  < Transfer-Encoding: chunked
  < Server: Jetty(8.1.17.v20150415)
  <
  { [16071 bytes data]
  100 178k 0 178k 0 0 19.6M 0 -::- -::- -::- 21.8M
• Connection #0 to host localhost left intact