diff --git a/lib/commands/admin-rpc.js b/lib/commands/admin-rpc.js
index 595b4c6dc..83e2ce8ca 100644
--- a/lib/commands/admin-rpc.js
+++ b/lib/commands/admin-rpc.js
@@ -5,6 +5,7 @@ const getFolderSize = require("get-folder-size");
 const Util = require("../common-util");
 const Ulimit = require("ulimit");
 const Decrees = require("../decrees");
+const Pinning = require("./pin-rpc");
 
 var Fs = require("fs");
 
@@ -324,6 +325,13 @@ var getLimits = function (Env, Server, cb) {
     cb(void 0, Env.limits);
 };
 
+// CryptPad_AsyncStore.rpc.send('ADMIN', ['GET_USER_TOTAL_SIZE', "CrufexqXcY/z+eKJlEbNELVy5Sb7E/EAAEFI8GnEtZ0="], console.log)
+var getUserTotalSize = function (Env, Server, cb, data) {
+    var signingKey = Array.isArray(data) && data[1];
+    if (typeof(signingKey) !== 'string' || signingKey.length < 44) { return void cb("EINVAL"); } // FIXME use a standard check for this
+    Pinning.getTotalSize(Env, signingKey, cb)
+};
+
 var commands = {
     ACTIVE_SESSIONS: getActiveSessions,
     ACTIVE_PADS: getActiveChannelCount,
@@ -349,6 +357,7 @@ var commands = {
     GET_LIMITS: getLimits,
     SET_LAST_EVICTION: setLastEviction,
     GET_WORKER_PROFILES: getWorkerProfiles,
+    GET_USER_TOTAL_SIZE: getUserTotalSize,
 };
 
 Admin.command = function (Env, safeKey, data, _cb, Server) {