diff --git a/main.cpp b/main.cpp
index 36e01d3..66ff979 100644
--- a/main.cpp
+++ b/main.cpp
@@ -52,6 +52,18 @@ int main(int argc, char** argv) {
     });
 
 #ifndef NDEBUG
+    // TODO remove
+    server.Get("/debug/userillusts", [&](const httplib::Request& req, httplib::Response& res) {
+        std::vector<uint64_t> illusts = pixiv_client.get_illusts(2583663);
+        std::string output;
+
+        for (uint64_t i : illusts) {
+            output += std::to_string(i);
+            output += '\n';
+        }
+
+        res.set_content(std::move(output), "text/plain");
+    });
     server.Get("/debug/exception/known", [](const httplib::Request& req, httplib::Response& res) {
         throw std::runtime_error("awoo");
     });
diff --git a/pixivclient.cpp b/pixivclient.cpp
index c2b2053..8eb5160 100644
--- a/pixivclient.cpp
+++ b/pixivclient.cpp
@@ -22,6 +22,22 @@ User PixivClient::get_user(uint64_t user_id) {
     return this->_handle_result(std::move(res)).at("user_details").get<User>();
 }
 
+std::vector<uint64_t> PixivClient::get_illusts(uint64_t user_id) {
+    httplib::Result res = this->_www_pixiv_net_client.Get("/touch/ajax/illust/user_illusts", {
+        {"lang", "en"}, {"user_id", std::to_string(user_id)}
+    }, httplib::Headers());
+
+    nlohmann::json user_illust_ids = this->_handle_result(std::move(res)).at("user_illust_ids");
+    std::vector<uint64_t> ret;
+    ret.reserve(user_illust_ids.size());
+
+    for (auto &[_, i] : user_illust_ids.items()) {
+        ret.push_back(to_ull(std::move(i)));
+    }
+
+    return ret;
+}
+
 nlohmann::json PixivClient::_handle_result(httplib::Result res) {
     if (!res) {
         throw HTTPLibException(res.error());
diff --git a/pixivclient.h b/pixivclient.h
index 7505939..76eabb3 100644
--- a/pixivclient.h
+++ b/pixivclient.h
@@ -27,6 +27,7 @@ public:
     PixivClient();
 
     User get_user(uint64_t user_id);
+    std::vector<uint64_t> get_illusts(uint64_t user_id);
 
 private:
     nlohmann::json _handle_result(httplib::Result res);