diff --git a/db/db-core/src/lib.rs b/db/db-core/src/lib.rs
index 410d14be..aaccd9d6 100644
--- a/db/db-core/src/lib.rs
+++ b/db/db-core/src/lib.rs
@@ -232,6 +232,26 @@ pub trait MCDatabase: std::marker::Send + std::marker::Sync + CloneSPDatabase {
 
     /// record PoWConfig confirms
     async fn record_confirm(&self, key: &str) -> DBResult<()>;
+
+    /// featch PoWConfig fetches
+    async fn fetch_config_fetched(&self, user: &str, key: &str) -> DBResult<Vec<i64>>;
+
+    /// featch PoWConfig solves
+    async fn fetch_solve(&self, user: &str, key: &str) -> DBResult<Vec<i64>>;
+
+    /// featch PoWConfig confirms
+    async fn fetch_confirm(&self, user: &str, key: &str) -> DBResult<Vec<i64>>;
+}
+
+#[derive(Debug, Clone, Default, Deserialize, Serialize, PartialEq)]
+/// Captcha statistics with time recorded in UNIX epoch formats
+pub struct StatsUnixTimestamp {
+    /// times at which the configuration were fetched
+    pub config_fetches: Vec<i64>,
+    /// times at which the PoW was solved
+    pub solves: Vec<i64>,
+    /// times at which the PoW token was verified
+    pub confirms: Vec<i64>,
 }
 
 #[derive(Debug, Clone, Default, Deserialize, Serialize, PartialEq)]
diff --git a/db/db-core/src/tests.rs b/db/db-core/src/tests.rs
index 47986c1a..e5b351c4 100644
--- a/db/db-core/src/tests.rs
+++ b/db/db-core/src/tests.rs
@@ -209,14 +209,42 @@ pub async fn database_works<'a, T: MCDatabase>(
     let levels = db.get_captcha_levels(None, c.key).await.unwrap();
     assert_eq!(levels, l);
 
-    // delete captcha levels
-    db.delete_captcha_levels(p.username, c.key).await.unwrap();
+    /*
+     * Test stats
+     * 1. record fetch config
+     * 2. record solve
+     * 3. record token verify
+     * 4. fetch config fetches
+     * 5. fetch solves
+     * 6. fetch token verify
+     */
 
-    // update captcha; set description = username and duration *= duration;
-    let mut c2 = c.clone();
-    c2.duration *= c2.duration;
-    c2.description = p.username;
-    db.update_captcha_metadata(p.username, &c2).await.unwrap();
+    assert!(db
+        .fetch_config_fetched(p.username, c.key)
+        .await
+        .unwrap()
+        .is_empty());
+    assert!(db.fetch_solve(p.username, c.key).await.unwrap().is_empty());
+    assert!(db
+        .fetch_confirm(p.username, c.key)
+        .await
+        .unwrap()
+        .is_empty());
+
+    db.record_fetch(c.key).await.unwrap();
+    db.record_solve(c.key).await.unwrap();
+    db.record_confirm(c.key).await.unwrap();
+
+    assert_eq!(db.fetch_solve(p.username, c.key).await.unwrap().len(), 1);
+    assert_eq!(
+        db.fetch_config_fetched(p.username, c.key)
+            .await
+            .unwrap()
+            .len(),
+        1
+    );
+    assert_eq!(db.fetch_solve(p.username, c.key).await.unwrap().len(), 1);
+    assert_eq!(db.fetch_confirm(p.username, c.key).await.unwrap().len(), 1);
 
     // update captcha key; set key = username;
     db.update_captcha_key(p.username, c.key, p.username)
@@ -230,6 +258,15 @@ pub async fn database_works<'a, T: MCDatabase>(
         .await
         .unwrap());
 
+    // delete captcha levels
+    db.delete_captcha_levels(p.username, c.key).await.unwrap();
+
+    // update captcha; set description = username and duration *= duration;
+    let mut c2 = c.clone();
+    c2.duration *= c2.duration;
+    c2.description = p.username;
+    db.update_captcha_metadata(p.username, &c2).await.unwrap();
+
     // delete captcha; updated key = p.username so invoke delete with it
     db.delete_captcha(p.username, p.username).await.unwrap();
     assert!(!db.captcha_exists(Some(p.username), c.key).await.unwrap());