diff --git a/src/backend/cuda/CudaBackend.cpp b/src/backend/cuda/CudaBackend.cpp
index 9043299c1..903c096ff 100644
--- a/src/backend/cuda/CudaBackend.cpp
+++ b/src/backend/cuda/CudaBackend.cpp
@@ -169,7 +169,7 @@ public:
     }
 
 
-    inline void start(const Job &job)
+    inline void start(const Job &)
     {
         LOG_INFO("%s use profile " BLUE_BG(WHITE_BOLD_S " %s ") WHITE_BOLD_S " (" CYAN_BOLD("%zu") WHITE_BOLD(" threads)") " scratchpad " CYAN_BOLD("%zu KB"),
                  tag,
@@ -285,7 +285,7 @@ void xmrig::CudaBackend::printHashrate(bool details)
 
     size_t i = 0;
     for (const auto &data : d_ptr->threads) {
-         Log::print("| %8zu | %8" PRId64 " | %7s | %7s | %7s |" CYAN_BOLD(" #%u") YELLOW(" %s") " %s",
+         Log::print("| %8zu | %8" PRId64 " | %7s | %7s | %7s |" CYAN_BOLD(" #%u") YELLOW(" %s") GREEN(" %s"),
                     i,
                     data.thread.affinity(),
                     Hashrate::format(hashrate()->calc(i, Hashrate::ShortInterval),  num,         sizeof num / 3),
@@ -390,6 +390,27 @@ rapidjson::Value xmrig::CudaBackend::toJSON(rapidjson::Document &doc) const
     out.AddMember("algo",       d_ptr->algo.toJSON(), allocator);
     out.AddMember("profile",    profileName().toJSON(), allocator);
 
+    if (d_ptr->threads.empty() || !hashrate()) {
+        return out;
+    }
+
+    out.AddMember("hashrate", hashrate()->toJSON(doc), allocator);
+
+    Value threads(kArrayType);
+
+    size_t i = 0;
+    for (const auto &data : d_ptr->threads) {
+        Value thread = data.thread.toJSON(doc);
+        thread.AddMember("hashrate", hashrate()->toJSON(i, doc), allocator);
+
+        data.device.toJSON(thread, doc);
+
+        i++;
+        threads.PushBack(thread, allocator);
+    }
+
+    out.AddMember("threads", threads, allocator);
+
     return out;
 }
 
diff --git a/src/backend/cuda/wrappers/CudaDevice.cpp b/src/backend/cuda/wrappers/CudaDevice.cpp
index 7eb947fc2..740a063c5 100644
--- a/src/backend/cuda/wrappers/CudaDevice.cpp
+++ b/src/backend/cuda/wrappers/CudaDevice.cpp
@@ -115,5 +115,15 @@ void xmrig::CudaDevice::generate(const Algorithm &algorithm, CudaThreads &thread
 #ifdef XMRIG_FEATURE_API
 void xmrig::CudaDevice::toJSON(rapidjson::Value &out, rapidjson::Document &doc) const
 {
+    using namespace rapidjson;
+    auto &allocator = doc.GetAllocator();
+
+    out.AddMember("name",           name().toJSON(doc), allocator);
+    out.AddMember("bus_id",         topology().toString().toJSON(doc), allocator);
+    out.AddMember("smx",            smx(), allocator);
+    out.AddMember("arch",           arch(), allocator);
+    out.AddMember("global_mem",     static_cast<uint64_t>(globalMemSize()), allocator);
+    out.AddMember("clock",          clock(), allocator);
+    out.AddMember("memory_clock",   memoryClock(), allocator);
 }
 #endif
diff --git a/src/backend/cuda/wrappers/CudaDevice.h b/src/backend/cuda/wrappers/CudaDevice.h
index 40b8ee11f..07866c82e 100644
--- a/src/backend/cuda/wrappers/CudaDevice.h
+++ b/src/backend/cuda/wrappers/CudaDevice.h
@@ -60,6 +60,7 @@ public:
     inline bool isValid() const                 { return m_ctx != nullptr; }
     inline const PciTopology &topology() const  { return m_topology; }
     inline const String &name() const           { return m_name; }
+    inline uint32_t arch() const                { return (computeCapability(true) * 10) + computeCapability(false); }
     inline uint32_t index() const               { return m_index; }
 
 #   ifdef XMRIG_FEATURE_API
diff --git a/src/backend/opencl/OclBackend.cpp b/src/backend/opencl/OclBackend.cpp
index 8aadc9264..c9fef1f91 100644
--- a/src/backend/opencl/OclBackend.cpp
+++ b/src/backend/opencl/OclBackend.cpp
@@ -409,7 +409,7 @@ rapidjson::Value xmrig::OclBackend::toJSON(rapidjson::Document &doc) const
     Value threads(kArrayType);
 
     size_t i = 0;
-    for (const OclLaunchData &data : d_ptr->threads) {
+    for (const auto &data : d_ptr->threads) {
         Value thread = data.thread.toJSON(doc);
         thread.AddMember("affinity", data.affinity, allocator);
         thread.AddMember("hashrate", hashrate()->toJSON(i, doc), allocator);