diff --git a/launcher/CMakeLists.txt b/launcher/CMakeLists.txt
index 085cc211..6dcea8e2 100644
--- a/launcher/CMakeLists.txt
+++ b/launcher/CMakeLists.txt
@@ -483,6 +483,7 @@ set(API_SOURCES
     modplatform/ModAPI.h
 
     modplatform/flame/FlameAPI.h
+    modplatform/flame/FlameAPI.cpp
     modplatform/modrinth/ModrinthAPI.h
     modplatform/modrinth/ModrinthAPI.cpp
     modplatform/helpers/NetworkModAPI.h
diff --git a/launcher/modplatform/flame/FlameAPI.cpp b/launcher/modplatform/flame/FlameAPI.cpp
new file mode 100644
index 00000000..983e09fd
--- /dev/null
+++ b/launcher/modplatform/flame/FlameAPI.cpp
@@ -0,0 +1,125 @@
+#include "FlameAPI.h"
+#include "FlameModIndex.h"
+
+#include "Application.h"
+#include "BuildConfig.h"
+#include "Json.h"
+
+#include "net/Upload.h"
+
+auto FlameAPI::matchFingerprints(const std::list<uint>& fingerprints, QByteArray* response) -> NetJob::Ptr
+{
+    auto* netJob = new NetJob(QString("Flame::MatchFingerprints"), APPLICATION->network());
+
+    QJsonObject body_obj;
+    QJsonArray fingerprints_arr;
+    for (auto& fp : fingerprints) {
+        fingerprints_arr.append(QString("%1").arg(fp));
+    }
+
+    body_obj["fingerprints"] = fingerprints_arr;
+
+    QJsonDocument body(body_obj);
+    auto body_raw = body.toJson();
+
+    netJob->addNetAction(Net::Upload::makeByteArray(QString("https://api.curseforge.com/v1/fingerprints"), response, body_raw));
+
+    QObject::connect(netJob, &NetJob::finished, [response] { delete response; });
+
+    return netJob;
+}
+
+auto FlameAPI::getModFileChangelog(int modId, int fileId) -> QString
+{
+    QEventLoop lock;
+    QString changelog;
+
+    auto* netJob = new NetJob(QString("Flame::FileChangelog"), APPLICATION->network());
+    auto* response = new QByteArray();
+    netJob->addNetAction(Net::Download::makeByteArray(
+        QString("https://api.curseforge.com/v1/mods/%1/files/%2/changelog")
+            .arg(QString::fromStdString(std::to_string(modId)), QString::fromStdString(std::to_string(fileId))),
+        response));
+
+    QObject::connect(netJob, &NetJob::succeeded, [netJob, response, &changelog] {
+        QJsonParseError parse_error{};
+        QJsonDocument doc = QJsonDocument::fromJson(*response, &parse_error);
+        if (parse_error.error != QJsonParseError::NoError) {
+            qWarning() << "Error while parsing JSON response from Flame::FileChangelog at " << parse_error.offset
+                       << " reason: " << parse_error.errorString();
+            qWarning() << *response;
+
+            netJob->failed(parse_error.errorString());
+            return;
+        }
+
+        changelog = Json::ensureString(doc.object(), "data");
+    });
+
+    QObject::connect(netJob, &NetJob::finished, [response, &lock] {
+        delete response;
+        lock.quit();
+    });
+
+    netJob->start();
+    lock.exec();
+
+    return changelog;
+}
+
+auto FlameAPI::getLatestVersion(VersionSearchArgs&& args) -> ModPlatform::IndexedVersion
+{
+    QEventLoop loop;
+
+    auto netJob = new NetJob(QString("Flame::GetLatestVersion(%1)").arg(args.addonId), APPLICATION->network());
+    auto response = new QByteArray();
+    ModPlatform::IndexedVersion ver;
+
+    netJob->addNetAction(Net::Download::makeByteArray(getVersionsURL(args), response));
+
+    QObject::connect(netJob, &NetJob::succeeded, [response, args, &ver] {
+        QJsonParseError parse_error{};
+        QJsonDocument doc = QJsonDocument::fromJson(*response, &parse_error);
+        if (parse_error.error != QJsonParseError::NoError) {
+            qWarning() << "Error while parsing JSON response from latest mod version at " << parse_error.offset
+                       << " reason: " << parse_error.errorString();
+            qWarning() << *response;
+            return;
+        }
+
+        try {
+            auto obj = Json::requireObject(doc);
+            auto arr = Json::requireArray(obj, "data");
+
+            QJsonObject latest_file_obj;
+            ModPlatform::IndexedVersion ver_tmp;
+
+            for (auto file : arr) {
+                auto file_obj = Json::requireObject(file);
+                auto file_tmp = FlameMod::loadIndexedPackVersion(file_obj);
+                if(file_tmp.date > ver_tmp.date) {
+                    ver_tmp = file_tmp;
+                    latest_file_obj = file_obj;
+                }
+            }
+
+            ver = FlameMod::loadIndexedPackVersion(latest_file_obj);
+        } catch (Json::JsonException& e) {
+            qCritical() << "Failed to parse response from a version request.";
+            qCritical() << e.what();
+            qDebug() << doc;
+        }
+    });
+
+    QObject::connect(netJob, &NetJob::finished, [response, netJob, &loop] {
+        netJob->deleteLater();
+        delete response;
+        loop.quit();
+    });
+
+    netJob->start();
+
+    loop.exec();
+
+    return ver;
+}
diff --git a/launcher/modplatform/flame/FlameAPI.h b/launcher/modplatform/flame/FlameAPI.h
index aea76ff1..e45b5cb1 100644
--- a/launcher/modplatform/flame/FlameAPI.h
+++ b/launcher/modplatform/flame/FlameAPI.h
@@ -3,7 +3,15 @@
 #include "modplatform/ModIndex.h"
 #include "modplatform/helpers/NetworkModAPI.h"
 
+#include "net/NetJob.h"
+
 class FlameAPI : public NetworkModAPI {
+   public:
+    auto matchFingerprints(const std::list<uint>& fingerprints, QByteArray* response) -> NetJob::Ptr;
+    auto getModFileChangelog(int modId, int fileId) -> QString;
+
+    auto getLatestVersion(VersionSearchArgs&& args) -> ModPlatform::IndexedVersion;
+
    private:
     inline auto getSortFieldInt(QString sortString) const -> int
     {
diff --git a/launcher/modplatform/flame/FlameModIndex.cpp b/launcher/modplatform/flame/FlameModIndex.cpp
index b99bfb26..0ad1d4ba 100644
--- a/launcher/modplatform/flame/FlameModIndex.cpp
+++ b/launcher/modplatform/flame/FlameModIndex.cpp
@@ -110,7 +110,7 @@ auto FlameMod::loadIndexedPackVersion(QJsonObject& obj) -> ModPlatform::IndexedV
     file.fileId = Json::requireInteger(obj, "id");
     file.date = Json::requireString(obj, "fileDate");
     file.version = Json::requireString(obj, "displayName");
-    file.downloadUrl = Json::requireString(obj, "downloadUrl");
+    file.downloadUrl = Json::ensureString(obj, "downloadUrl");
     file.fileName = Json::requireString(obj, "fileName");
 
     auto hash_list = Json::ensureArray(obj, "hashes");