diff --git a/src/gateway/http.rs b/src/gateway/http.rs
index a455a6b..87baab9 100644
--- a/src/gateway/http.rs
+++ b/src/gateway/http.rs
@@ -947,6 +947,49 @@ pub async fn get_memories(
     Ok(Json(json!({ "memories": memories })))
 }
 
+#[derive(Deserialize)]
+pub struct PutMemoryBody {
+    content: String,
+    importance: Option<f64>,
+}
+
+pub async fn put_memory(
+    State(state): State<Arc<GatewayState>>,
+    Path(key): Path<String>,
+    Json(body): Json<PutMemoryBody>,
+) -> Result<Json<Value>, ApiError> {
+    let existing = state
+        .storage
+        .get_memory_by_key(&key)
+        .await
+        .map_err(ApiError::internal)?
+        .ok_or_else(|| ApiError::not_found("memory not found"))?;
+    let mut updated = existing;
+    updated.content = body.content;
+    if let Some(importance) = body.importance {
+        updated.importance = importance.clamp(0.0, 1.0);
+    }
+    updated.updated_at = chrono::Utc::now().to_rfc3339();
+    state
+        .storage
+        .upsert_memory(&updated)
+        .await
+        .map_err(ApiError::internal)?;
+    Ok(Json(json!({ "updated": true, "key": key })))
+}
+
+pub async fn delete_memory(
+    State(state): State<Arc<GatewayState>>,
+    Path(key): Path<String>,
+) -> Result<Json<Value>, ApiError> {
+    state
+        .storage
+        .delete_memory(&key)
+        .await
+        .map_err(ApiError::internal)?;
+    Ok(Json(json!({ "deleted": true })))
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
diff --git a/src/gateway/mod.rs b/src/gateway/mod.rs
index 36fc4cc..00a4432 100644
--- a/src/gateway/mod.rs
+++ b/src/gateway/mod.rs
@@ -599,6 +599,10 @@ fn build_router(state: Arc<GatewayState>) -> Router {
         .route("/api/jobs", routing::get(http::get_jobs))
         .route("/api/jobs/{id}/runs", routing::get(http::get_job_runs))
         .route("/api/memories", routing::get(http::get_memories))
+        .route(
+            "/api/memories/{key}",
+            routing::put(http::put_memory).delete(http::delete_memory),
+        )
         .route(
             "/api/chat/{client_id}/uploads",
             routing::post(http::upload_file).layer(axum::extract::DefaultBodyLimit::disable()),
diff --git a/src/storage/memory.rs b/src/storage/memory.rs
index ffc8fc7..5e2db2d 100644
--- a/src/storage/memory.rs
+++ b/src/storage/memory.rs
@@ -42,6 +42,17 @@ impl super::Storage {
         parse_memory_rows(&rows)
     }
 
+    pub async fn get_memory_by_key(&self, key: &str) -> Result<Option<MemoryEntry>, StorageError> {
+        let rows = sqlx::query(
+            "SELECT id, key, content, category, importance, session_id, created_at, updated_at FROM memories WHERE key = ?",
+        )
+        .bind(key)
+        .fetch_all(self.pool())
+        .await?;
+        let mut entries = parse_memory_rows(&rows)?;
+        Ok(entries.pop())
+    }
+
     /// Store or update a memory entry (upsert by key).
     pub async fn upsert_memory(&self, entry: &MemoryEntry) -> Result<(), StorageError> {
         let category_str = entry.category.as_str();